Article – KAGER

What is a Prefab Glass House?

What is a Prefab Glass House?

A prefab glass house is a prefabricated structure that utilizes extensive glass elements, offering a modern, eco-friendly, and energy-efficient living solution. These houses are constructed off-site in factories and assembled on location, providing numerous advantages in terms of construction speed, cost-efficiency, and design flexibility.

Advantages of Prefab Glass Houses

Speedy Construction

Rapid Assembly: One of the most significant benefits of prefab glass houses is the speed of construction. Unlike traditional building methods, which can take months or even years, prefab houses can be assembled on-site in a matter of weeks. According to the National Association of Home Builders, the off-site construction process can reduce build time by up to 50%.

Cost Efficiency

Budget-Friendly: Prefab glass houses are generally more cost-effective compared to traditional homes. The factory setting allows for bulk purchasing of materials and reduces waste, ultimately lowering costs. Moreover, the quick assembly time minimizes labor costs significantly.

Design Flexibility

Customizable Designs: Prefab glass houses offer a high degree of customization. Homeowners can choose from various design options and layouts, allowing for a tailored living space that meets their specific needs and preferences. This flexibility is particularly appealing for those looking to create unique, modern living spaces.


Sustainable Living: These houses are often designed with sustainability in mind. The use of glass not only maximizes natural light, reducing the need for artificial lighting, but also incorporates advanced glazing technologies for better insulation. Prefabrication reduces waste and the carbon footprint associated with traditional construction methods. According to a report by McKinsey & Company, modular construction can cut waste by up to 90%.

Energy Efficiency

Superior Insulation

Thermal Performance: Modern prefab glass houses use high-performance glazing and advanced insulation techniques to maintain consistent indoor temperatures, which can significantly reduce energy consumption. Double or triple-glazed windows help in minimizing heat loss during winters and keep interiors cool during summers.

Solar Gain

Natural Light Utilization: The extensive use of glass maximizes solar gain, utilizing natural sunlight to warm the house during the day. This reduces the reliance on heating systems, lowering energy bills and enhancing the home’s eco-friendliness.

Innovative Technologies

Smart Home Integration

Advanced Systems: Prefab glass houses often incorporate the latest smart home technologies, including automated lighting, heating, and security systems. These integrations not only enhance comfort and convenience but also improve energy management, contributing to overall sustainability.

Renewable Energy Sources

Green Power: Many prefab glass houses are equipped with renewable energy systems such as solar panels or wind turbines. These systems provide a clean, sustainable source of energy, further reducing the carbon footprint of the house.

Durability and Safety

Sturdy Construction

Robust Materials: Despite their delicate appearance, prefab glass houses are built to last. The materials used in the construction are durable and designed to withstand various weather conditions. The structural integrity of these houses is often superior to traditional homes due to the precision manufacturing process.

Safety Features

Enhanced Security: Modern prefab glass houses are equipped with toughened glass and secure locking mechanisms to ensure safety. Additionally, the integration of advanced security systems provides homeowners with peace of mind.

Case Studies and Examples

Luxurious Prefab Glass Homes

Project Spotlight: The “Lake Glass House” is a prime example of a luxurious prefab glass house that combines modern design with high functionality. This project showcases the potential of prefab glass houses to deliver both aesthetic appeal and practical living solutions.

Affordable Prefab Solutions

Budget-Friendly Models: Companies like Blu Homes and LivingHomes offer affordable prefab glass house options that do not compromise on quality or design. These models are perfect for eco-conscious buyers looking for cost-effective housing solutions.


In summary, prefab glass houses provide a myriad of benefits, from rapid construction and cost savings to energy efficiency and sustainability. Their customizable design, modern technologies, and eco-friendly features make them an attractive option for contemporary living. By understanding the advantages and possibilities of prefab glass houses, potential homeowners can make informed decisions that align with their lifestyle and environmental goals.

Our Certifications: A Guarantee of Quality

At Kager Hiša, we pride ourselves on the quality and reliability of our wooden houses. Our numerous certifications reflect our commitment to excellence and ensure that our constructions meet the highest standards. Here are the key certifications our wooden houses possess:

1. CE Certification

The CE marking guarantees that our houses meet essential requirements related to the safety of the structure: resistance, mechanical stability, sustainability, and a healthy living environment. It also ensures compliance with requirements for the emissions of hazardous substances, as well as thermal and acoustic insulation and sound absorption.

2. PEFC Certification

Kager Hiša has obtained the PEFC Certification for the wood used and the Chain of Custody Certification. These certifications attest to the origin of the wood from sustainably managed forests and ensure that all processing phases up to the finished construction comply with the PEFC protocol.

3. SALE Certification

The SALE (Sistema Affidabilità Legno Edilizia) certification identifies companies that build green buildings in compliance with current regulations, guaranteeing long-lasting, quality constructions. The SALE certification also provides customers with access to facilitated mortgage options dedicated to the wooden house and green building sector at major credit institutions, as well as favorable conditions for home insurance policies.

4. RAL Quality Mark

The high quality of the incorporated materials, sophisticated production, and meticulous assembly of Kager houses are demonstrated by the RAL certificate, issued by the Bundes-Gütegemeinschaft Montagebau und Fertighäuser.

5. DIN 1052 Quality Mark

In addition to the above certifications, all our houses meet the demanding German standard DIN 1052, which ensures correct construction execution, as well as environmental, fire, and earthquake safety, and sound insulation.

6. Members of the Section “Slovenian Producers of Prefabricated Wooden Houses”

Kager Hiša d.o.o. is a member of the Slovenian Prefabricated Wooden House Manufacturers (SPLMS) Section. According to the rules of the Section, SPLMS includes only manufacturers of prefabricated wooden buildings that meet the highest quality standards and have acquired European technical approval, allowing them to affix the CE mark to their products. SPLMS members are involved in developing wooden constructions that meet the highest technical, environmental, and aesthetic standards.

7. 25 Years of Controlled Production by Bundes Gütegemeinschaft

For 25 years, the production of Kager Hiša d.o.o. has been controlled according to the quality protocol of the wooden house manufacturers Bundes Gütegemeinschaft. In 2018, we celebrated this significant 25-year milestone.

8. Fire Resistance Certified by Holz Forschung

The fire resistance of Kager wooden house structures is certified by Holz Forschung Austria, an independent certification body recognized at the European level. This certification guarantees that a Kager wooden house can withstand a fire without risking collapse.

Discover the elegance and efficiency of Kager House’s prefab glass houses

At Kager House, we are redefining modern living with our stunning prefab glass houses. Combining the elegance of glass architecture with the efficiency and sustainability of prefabricated construction, our homes offer a unique blend of contemporary design and eco-friendly living.

In this article, we will explore the numerous benefits of Kager House’s prefab glass houses and why they are the perfect choice for your next home.

What is a prefab glass house by Kager House?

A Kager House prefab glass house is a type of prefabricated home that incorporates extensive glass elements in its design, offering breathtaking views and seamless integration with the surrounding environment.

Prefabrication means that the components of the house are manufactured off-site in our state-of-the-art factory and then assembled on-site, ensuring precision and quality in every build.

Benefits of Kager House’s prefab glass houses

  1. Modern aesthetics Kager House’s prefab glass houses are known for their sleek, modern design. The use of large glass panels allows for an abundance of natural light, creating a bright and airy living environment. The transparency of glass blurs the line between indoor and outdoor spaces, offering stunning views and a connection to nature.
  2. Energy efficiency Our prefab glass houses are designed with energy efficiency in mind. We use high-performance glass that helps regulate indoor temperatures, reducing the need for artificial heating and cooling. Additionally, our homes often incorporate other sustainable features, such as solar panels and energy-efficient appliances, to minimize their environmental impact.
  3. Quick and cost-effective construction One of the most significant advantages of our prefabricated construction is the reduced build time. Since the components are manufactured in a controlled factory environment, the assembly process on-site is much quicker compared to traditional methods. This efficiency also translates to cost savings, as labor and material waste are minimized.
  4. Customization and flexibility Kager House offers a high degree of customization. Homeowners can choose from a variety of designs, layouts, and finishes to suit their personal preferences and lifestyles. Whether you desire a minimalist open-plan layout or a more traditional segmented space, our prefab construction can accommodate your needs.
  5. Durability and quality Our prefabricated components are manufactured to precise specifications, ensuring consistent quality and durability. The controlled factory environment eliminates the risks associated with on-site construction, such as weather delays and material inconsistencies. As a result, Kager House prefab glass houses are built to last and require minimal maintenance.

Designing your Kager House prefab glass house

When designing a prefab glass house with Kager House, consider the following key factors:

  • Location and orientation: The placement of your home should maximize natural light and take advantage of scenic views. Consider the orientation to optimize solar gain and minimize energy consumption.
  • Materials: Choose high-quality, sustainable materials for both the structural components and finishes. This will enhance the overall durability and aesthetic appeal of your home.
  • Floor plan: Decide on a floor plan that suits your lifestyle. Open-plan layouts are popular for their spacious feel, but segmented designs can offer more privacy and defined areas.
  • Interior design: Select interior finishes and furnishings that complement the modern aesthetic of your glass house. Natural materials, such as wood and stone, work well with glass to create a harmonious look.


Kager House’s prefab glass houses are the epitome of modern, sustainable, and stylish living. With numerous benefits, including energy efficiency, quick construction, and customization options, our homes are designed to meet the needs of contemporary homeowners.

If you’re considering a new home, a Kager House prefab glass house is the perfect solution for you.

For more information on our prefab glass houses and to explore design options, contact us today. Start your journey to a brighter, more sustainable future with a beautiful Kager House prefab glass house.

First project in Spain

After three years of collaboration

We are thrilled to share the exciting news about the initiation of our first project in Spain! After three years of detailed planning and close collaboration with the architect and client, we have finally begun preparing the site.


A new milestone for our company

This first house in Spain is not just another project; it represents a significant milestone for our company. With our presence already established in Germany, Italy, France, and Switzerland, we are now expanding to Spain. This expansion demonstrates our ongoing commitment to growth and delivering our high-quality services in new markets.


Enthusiasm for a new market

Our extensive experience teaches us that patience and mutual trust are crucial for the successful execution of any project. This endeavor is yet another example of how consistent collaboration and careful planning lead to client satisfaction and quality living in a new home.



We are excited to share these moments with you and look forward to updating you on our progress in Spain. Thank you for being part of our journey and for trusting Kager House in creating your dream homes.

Advantages of Prefabricated Timber Houses

Over 35 Years of Experience

Our technical solutions are based on decades of experience in building timber structures and the latest findings in the use of eco-friendly materials. The origins of our company date back to 1989, with our initial experiences in prefabricated timber houses starting in the 1970s in the USA and Germany.


Every house is individually designed according to the client’s requirements, needs, and wishes. We have satisfied more than 1000 families in Slovenia, Austria, Germany, Switzerland, Italy, France, Russia, and Ukraine with our personalized approach.

Construction Speed

Prefabricated components of KAGER houses are assembled on-site within three days. Since the construction process, except for the screeds, is dry, the house does not require prolonged drying and is ready for occupancy within eight months.




KAGER houses meet the highest architectural standards in terms of both interior and exterior design and timeless elegance. All structural elements are produced using CNC machines based on 3D computer models, ensuring error-free construction. Our team includes civil engineers, skilled carpenters, joiners, and other professionals. All wood is handcrafted.

Optimal Execution at All Project Levels

At KAGER Hiša, we ensure optimal execution of all project phases – from initial consultation, planning, production, supervision, to final implementation.


Stress-free planning with predefined deadlines, fixed construction costs, and guaranteed quality of the final product. The price for each house is determined after a thorough analysis of all client-specific requirements and expectations.


A KAGER house represents infinite design possibilities. We can meet any specific requirement, whether it’s a luxurious villa, a country house, or the most modern architecture. Your desires, needs, and lifestyle dictate the final appearance and function.

Energy Efficiency

The principle of every KAGER house is to use all energy sources as economically and ecologically as possible – including passive solar energy. Extensive timber-glass structures with high transparency are oriented from east to west, capturing maximum solar energy. Conversely, smaller, more cold-resistant windows face north. This design allows the house to capture and retain heat efficiently, resulting in very low heating costs.

Health and Comfort

Timber is a natural material that positively impacts health and overall well-being, creating a warm and homely atmosphere. Our houses are built from natural, renewable materials, with a construction volume smaller than traditional buildings. Additionally, the energy required for the creation and deconstruction of the house is minimal.

Earthquake Safety

KAGER houses are earthquake-safe. The supporting structure of our prefabricated timber houses has a high energy absorption capacity, making them resilient to seismic activity. This characteristic is due to the unique design, primary timber structure, cladding, and connecting materials.

By choosing KAGER Hiša, you invest in a prefabricated timber house that offers customization, quick construction, and superior quality, all while ensuring energy efficiency and sustainability.

This is how we guarantee excellent energy performance in Vita Nova homes

When deciding to build a house that guarantees good energy performance, there are many aspects to consider. At Kager, we have made this one of our strong points, achieving excellent performance in the homes of the Vita Nova line.


We carefully select projects that can exploit the bio-climatic characteristics of their location. As specialists in active and passive insulation systems, we only use premium materials and apply various types of electrical systems using renewable sources.


Vita Nova wooden villa with glass windows without Kager consumption


Our materials, our technology

The combination of high-quality materials and technologies developed over the years allows us to build houses with exceptional energy performance. For wooden walls, we use high-density wood fiber, ensuring the best thermal and acoustic insulation. Kager construction technology achieves incredibly low thermal coefficients, ranging between 0.10 W/m²K and 0.14 W/m²K.


For glass, we use triple glazing with the lowest achievable thermal coefficient value today: 0.5 W/m²K. This ensures a constant temperature inside the home during both winter and summer.


Wood and glass villas Vita Nova interior Kager
Living room luxury villa wood glass Vita Nova Kager
Kitchen with large glass windows in Kager wood
Kitchen interior in vile wood Vita Nova Kager

Energy consumption: data at hand

Empirical data shows that temperature variations inside Kager homes are minimal in both summer and winter. In intense cold conditions, with the heating systems off, the temperature inside the house drops by only 1°C in 24 hours. During a very hot day, turning off the cooling system results in a variation of just 1°C over 24 hours.


A Vita Nova house measuring between 180 and 220 m² consumes between 15 and 18 KW/m²/year for heating, cooling, controlled mechanical ventilation, and domestic hot water.

Wooden glass house Vita Nova exterior

Our monitoring system

Measuring the performance of a house involves understanding how individual elements react to climatic conditions and energy needs as a whole. The exceptional nature of our creations lies in the balance of the entire project and the integration of each part into a single organism. This is why our homes fall into the A4 energy class or are categorized as “passive houses.”


With over 30 years of experience, we have created a monitoring network that keeps us updated on changes in living comfort and energy performance. Homes with structural glass walls have been among those that have most distinguished us in Europe.


By integrating premium materials, advanced technology and rigorous monitoring, we ensure that our Vita Nova homes provide unparalleled energy efficiency and comfort.


How a Kager house is born: all the steps

What are the stages of building a Kager house?

From verifying the architectural project to turnkey construction, this article summarizes the main steps that will lead you to enter your new wooden house.

Contractual phase


1. Pre-feasibility analysis

The creation of a new Kager wooden house always starts with validating the architectural project. Our technical office analyzes the project delivered to us to verify its feasibility according to Kager technology’s construction specifications.


2. Choice of finishes

With our offices and showrooms in the area, we will guide you step by step in choosing the finishes that will make your new home unique. Faithful to our approach of total project customization, we pay great attention to even the smallest details to meet every expectation. Any solutions not present among the currently available proposals may be developed ad hoc by our technical department.


3. Delivery of the estimate

With the information collected in the first two steps, we develop a complete estimate for the construction of your new home. Each Kager quote is drawn up following our policy of total transparency and cost certainty, delivering a clear, understandable document without surprises.

To find out more, read our in-depth focus “Wooden house estimates: how to read them?” .


4. Signing the contract

If our proposal is accepted, the first phase of the process that will lead to the delivery of your Kager wooden house ends with signing the contract. From this moment on, our team’s attention shifts to the design phase.


Design phase


5. Executive design

Every home we create is a tailor-made, unique, and inimitable project. This is why our technical office dedicates the utmost attention to each project for the study and definition of every detail. The designs will then be sent to the Kager factory for the production of the walls. The accurate realization of the executive project is our trademark and makes the subsequent assembly phase easier, allowing us to respect the times foreseen for the construction of your new home.


6. Load analysis

Load analysis defines the specifications of each structural element, representing one of the most important design steps. This study is carried out by our structural engineering department, made up of specialists in wooden house construction with experience in over 1,500 Kager houses built throughout Kager’s history.


7. Static relationship

The results of the analyses and design steps carried out so far are used to draw up the Certificate of Static Suitability. This document includes the report on seismic safety according to current regulations and represents the last authorization step to obtain the building permit.


Implementation phase


8. Factory production

The construction of the walls of your new wooden house takes place in the Kager factory, in a controlled and optimized working environment to guarantee the best working conditions for our expert workers. This ensures maximum control of the insulation of the walls, benefiting the home’s energy efficiency. This is one of the main advantages of prefabrication. Find out more in our in-depth focus.


 9. Transport to the construction site

Once all the structural elements of the house have been produced, they are transported to the construction site, where the base has already been built, to begin the house’s assembly. It is a process refined with experience, guaranteeing rapid and certain times, and is carried out exclusively by our team of specialized workers.


10. Assembly of the Advanced Blank

At the end of the assembly work on the house, the construction process reaches the so-called advanced rough stage, which includes the assembly of structures (such as internal and external walls, floors, roof, and porches), plastering of external walls, roofing, plumbing, and lifeline.

The time for completing the advanced rough work varies between 3 and 5 weeks, depending on the project’s complexity.


11. Turnkey

Following the completion of the advanced rough work, the following works will be carried out: completion of the internal and external floors and coverings, creation and painting of the internal plasterboard, installation of sanitary fixtures, taps, showers, internal doors, internal staircase, electrical system, hydro-thermo-sanitary, photovoltaic and VMC system, in addition to the customizations envisaged by the project.

The time for completion of the works and turnkey delivery is on average 16-20 weeks.

turnkey-wooden-house construction

This is the last step of a journey involving 150 experts, including engineers, architects, and specialized workers. Your new Kager home is now ready to welcome, protect, and excite you.


The house as an organism: the importance of intelligent design

Design and build a Vita Nova wooden house

Achieving high energy performance in a house, especially in a wood and glass construction using Vita Nova technology, does not depend solely on the characteristics of walls, ceilings, and windows but involves various factors.

First of all, the choice of materials used allows for higher or lower performance. In our case, we only use premium materials such as high-density wood fiber and high-performance structural glass for Vita Nova walls. Secondly, the application of construction technologies aimed at saving consumption counts, such as those we have refined over 30 years of research.

This brings us to the third point: intelligent design. Suppose the first two are fundamental for obtaining an excellent project. In that case, excellence cannot be achieved without a project that can make the most of the bio-climatic characteristics of the place where the house will be built.

Data such as the thermal coefficient of structural glass walls must be inserted into the context in which the Vita Nova wall is located, making a total balance in which the response of the house as a whole is analyzed.

Intelligent design orientation for Villa Vita Nova Kager
Villa wood glass Vita Nova night Kager
Villa Vita Nova nature orientation Kager

Intelligent design in practice

In practice, this translates into a series of architectural and energy solutions that influence the performance of the individual elements. An intelligent design must, therefore, take into account factors such as the optimal exposure of the rooms and the zenith rotation. Consequently, the provision of eaves, pergolas, porches, and terraces can protect the windows from direct sun in summer and favor radiation in winter when the sun’s trajectory is lower.

For example, the design of a house in a particularly sunny place with Vita Nova walls facing south should include the presence of overhangs that prevent the house from overheating. At the same time, in the winter months, the same overhangs would not represent a problem for cooling the house, as the sun is lower.

The technical verification of the projects

A house reacts like an organism to climatic conditions and energy needs: each element contributes to the functioning of the whole. It is up to the designer to optimize the composition of the walls, roof, reinforced concrete foundation plate, and external windows.

As builders, we take care to create only the projects proposed to us that meet these characteristics. Otherwise, we try, where possible, to make improvements in agreement with the designer. In the case of projects involving Vita Nova technology, Friedrich Kager himself takes care of the review.



Triple glazing and blinds for thermal insulation in Vita Nova homes

Thermal variations in a Vita Nova wooden villa

Among the characteristics that make Kager wooden houses outstanding in the construction field are the remarkable energy performances we guarantee for each project. This is especially true for homes with Vita Nova windows that cover extensive surfaces and replace entire walls.


Our customers often wonder how much large windows impact energy performance. This concern is understandable: glass indeed disperses heat faster than masonry or wooden walls, potentially leading to cold interiors in winter and overheating in summer.


However, evaluating a house’s energy performance requires considering it as a whole. Homes, much like organisms, function as integrated systems. Thus, it’s essential to make an overall assessment rather than focusing on a single element. Many techniques are applied to make our homes energy efficient. In this analysis, we delve into the importance of triple glazing and active blinds in Vita Nova houses.

Triple darkening glass villa Vita nova
Villa Vita Nova stained glass night Kager
Villa Vita Nova triple darkening glass exterior

Kager technology

To ensure minimal temperature variations inside Kager homes, we have adopted two complementary technologies: triple glazing to prevent cooling in winter and blinds to prevent overheating in summer.

Triple glazing

The glass we use is triple-glazed, which significantly reduces the thermal insulation coefficient. On average, single-glazed windows have a coefficient approaching 5.8 W/m²K, and double-glazed windows have around 2.8 W/m²K. The glass adopted by Kager has the lowest thermal coefficient value achievable today: 0.5 W/m²K.

Vita nova kitchen with triple glazed interiors

Blinds and sunblinds

Darkening systems are an often underestimated solution with great potential. These elements are placed in front of windows and glass to protect the home from the sun’s rays. The significant advantage of these systems is their ability to tilt the slats to regulate the amount of light and heat passing through the glass.


At Kager, we place the blinds outside the home. If inserted inside the glass, heat would still pass through the windows and enter the house. By placing them outside, they effectively shield the structure from the heat.

Villa Vitanova living internal blinds Kager
Vita nova living Kager sunblinds
Sunblinds, exterior detail of Villa Vitanova Kager

Additionally, an innovative technology unique to us allows for the integration of sunshade guides within the Vita Nova structure, making them invisible when closed and ensuring no aesthetic impact on the facade.


To ensure maximum living comfort, the blinds can be managed by the home automation system. This system, through light sensors, can regulate the amount of sunshine (and thus energy contribution) based on the season and the day/night cycle.


By combining high-performance materials and advanced technologies, we create homes that maintain optimal living conditions year-round. The synergy between triple glazing and external blinds is a key element in achieving the energy efficiency that Kager houses are known for.




High quality Laminated wood: more resistance, fewer design constraints

The history of Kager construction technology is rooted in key concepts of green building, such as the environmental sustainability of the entire project lifecycle, the achievement of maximum living well-being, the optimization of energy resources, and, above all, the use of natural and high-performing materials.


The construction of a wooden house allows for significant advantages in terms of living well-being, seismic resistance, and excellent energy performance, but only if the construction technology is based on a careful selection of the wood used. All wooden houses made by Kager, consistent with the company’s commitment to excellence in quality, have a structure composed exclusively of certified quality laminated wood.


The characteristics of laminated wood

Laminated wood, unlike solid wood, has no dimensional or shape limitations linked to the size of the tree, allowing greater freedom in the design phase. The production technology of laminated wood also improves the degree of drying, guaranteeing lower humidity content, and reduces the presence of cracks or shrinkage deformations, ensuring considerable shape stability. This allows us to avoid the need for pillars and metal carpentry in load-bearing structures, even for much larger dimensions than solid wood.


The product standard for laminated wood certification is the same as for solid wood, EN 14081. Both products are certified with the same level of reliability and safety.


The Kager quality standard requires that each processing step is carried out with the attention to detail that makes our prefabricated wooden houses special.


The knots naturally present in wood are one of the most beautiful and appreciated aesthetic characteristics of this material, but they represent a potential point of fragility on a structural level, as cracks can develop from the knots. For this reason, Kager craftsmen manually remove every knot present, replacing them with specific reinforcement dowels.








Once this phase is completed, the wall assembly process begins, carried out by hand by specialized technicians with decades of experience. From the assembly of the load-bearing sections to the blowing in of the insulating material and the installation of the wood fiber and natural fiber panels, each phase within the Kager factory ensures maximum control of the quality level of each module that leaves the production line and the absence of thermal bridges in the walls.




By combining these meticulous processes with high-quality materials, Kager ensures that every prefabricated wooden house not only meets but exceeds standards for durability, energy efficiency, and aesthetic appeal.

Construction technology – The advantages of prefabrication

Prefabrication is a construction method that offers various benefits, some of which are universally recognized while others are less known but equally important. Kager’s production technology is based on wooden prefabrication, requiring that all the structural walls are built (or prefabricated) inside the Kager factory in Slovenia.


This is where Kager’s experience, construction technology, and artisan technique come together to create our wooden walls. Subsequently, the walls are transported to the construction site, where our specialized technicians assemble them to create a new home.

But where is this particular production process most useful?

Energy efficiency

Prefabrication brings significant advantages in terms of energy efficiency because it allows us to eliminate many problems related to critical points for thermal insulation, such as windows and doors. Kager construction technology requires that all parts of the walls are completed during the production process in the factory, from the structural components to the materials for thermal and acoustic insulation, up to the fixtures and fittings.


The installation of these elements takes place in a controlled and comfortable environment, where our technicians can operate with the utmost attention to detail and in greater safety than on the construction site, where there are inevitably more risks and operational impediments. This ensures that it is possible to reach the highest quality standards and achieve the total absence of thermal bridges.


Thermal bridges, often found around window and door frames, are areas of the building envelope where greater heat exchange occurs between inside and outside, leading to losses that increase energy consumption. Furthermore, producing the walls within the factory allows us to drastically reduce the risk of damaging the most delicate components, operating in a protected environment with maximum order and cleanliness.


Reduced construction times

Through experience and constant updates, Kager has developed and perfected a unique construction method that combines design, production, construction, and assembly. This results in perfect synergy between the elements, precise to the centimeter, capable of achieving excellent results in thermal and wind tightness, as well as seismic stability.


One significant advantage of this process is the reduction in construction times. Thanks to prefabrication, the work carried out on-site is significantly reduced, shortening on-site construction times to a minimum and delivering the new house to our customers sooner.


Construction times typically last just 2-3 weeks for the advanced raw material stage, while the entire process from the ground floor slab to delivery to the customer is completed in just 4-5 months. (watch the video of the assembly on site ).

Low consumption even in winter: this is how we do it

Anyone who lives in a Kager wooden house quickly forgets about the high costs associated with winter heating that affect most traditional masonry buildings. But what are the reasons behind this difference? Here are the three main characteristics of Kager homes that allow you to maintain low heating costs even when external temperatures drop.

1. Absence of structural thermal bridges

Thermal bridges are areas of a building envelope where unwanted heat flow is generated between the inside and outside. These are most common at joints (between walls and floors, walls and ceilings, or roof beams and walls), where the geometric characteristics and the meeting of different materials can reduce the insulating capacity of the structure.

To address this issue, Kager engineers have developed various innovative solutions over the years, including the use of the highest quality materials which are unique in the wooden construction industry. Some design solutions include a double roof that guarantees proper insulation without thermal issues and the creation of fixing and anchoring systems for the structures (walls-walls, walls-floor, walls-basement reinforced concrete) combined with corner sealing systems. These elements remain a crucial aspect of Kager’s technological heritage.

Wooden houses winter heating consumption

2. Perfect insulation in window connections

Windows and French doors are the most critical thermal bridges in a home during winter. While design and living comfort recommend increasing glass surfaces to improve internal lighting conditions (and thus reduce energy consumption for lighting in winter), the connection points between windows and walls can often create drafts and lower internal temperatures.

It is not enough to have highly insulated glass (double or triple glazing); the installation phase is very delicate and can undermine the insulation capabilities of the frame. Prefabrication offers significant advantages in this case. In Kager prefabricated wooden houses, all fixtures are assembled in the factory in a protected and controlled environment where it is possible to achieve total insulation, free of imperfections, rich in details and technical measures that ensure the complete absence of thermal bridges.

Warm wooden houses in winter Kager Italy

3. Intelligent solutions for air exchange

Air exchange improves the quality of the air we breathe in our homes daily, especially when traditional heating systems excessively lower the humidity percentage, causing typical seasonal ailments.

Kager wooden houses are equipped with advanced controlled mechanical ventilation systems (VMC), which allow the air in the house to be renewed up to 8 times a day with the possibility of pre-heating the incoming air using the heat of the outgoing air. This way, it is no longer necessary to open the windows to breathe clean air, filtered against dust and pollen and treated to achieve ideal humidity conditions.

Would you like to know more?

In this article, we have explored some solutions that help reduce heating costs in a Kager house. To find out all the details, contact us and request an appointment with one of our consultants.

The difference between a Kager House and brick house

1. Construction times

Kager construction technology leverages the benefits of prefabrication to ensure extremely short construction times: from the ground floor slab to delivery to the customer in just 4-5 months. In contrast, a traditional house requires over 18 months of work, often compounded by difficulties in providing the client with definitive deadlines.

2. Certain costs

Kager wooden houses come with a procurement contract that includes a cost guarantee, ensuring that you won’t encounter any unpleasant surprises along the way. Traditional constructions often have quotes that can fluctuate during construction due to variations and unforeseen events.

3. Simplicity of procedures

With Kager, there is a single point of contact: our team coordinates all the figures involved in the process, maximizing simplification. In traditional constructions, it is common for the customer to interact with multiple specialists in individual areas of activity.

4. Customization

The flexibility of Kager construction technology, which is completely tailor-made, allows for no constraints during the design phase. Thanks to the lightness of wood, it is also possible to build elevations or extensions of existing structures. Traditional houses often face constraints during construction, and in many cases, interventions to raise or expand existing structures are not possible due to the high weight of the structure.

5. Living comfort

A Kager wooden house guarantees high well-being. The temperature inside the house does not fluctuate significantly with changes in the outside temperature (variation less than 1°C during a winter night). In summer, it remains cool even without air conditioning, thanks to high thermal insulation and low humidity.

Thus, there is no risk of mold in indoor environments. Traditional houses often have high humidity, thermal bridges, mold, and internal temperature fluctuations that necessitate air conditioning, especially in attics.

6. Security

A Kager home is fire-resistant. The external materials and internal sections of the walls allow a slow advance of the combustion front, ensuring the structure’s resistance for many hours even in the event of serious fires.

Traditional construction homes often use metal elements to ensure structural integrity. However, these materials are negatively affected by the high temperatures that can develop during a fire, risking structural failure.

7. Consumption

A 100 m² Kager house in energy class A4 has an extremely low annual heating cost, averaging €318 with methane gas, €217 with pellets, and €285 with a heat pump. Heating a traditional house in energy class C (70% of houses in Europe) of 100 m² costs on average up to four times as much: €1,090 with methane gas, €870 with pellets, and €1,200 with a heat pump.

8. Maintenance

Extraordinary maintenance of Kager wooden houses is simplified by the structure of the walls, optimized to facilitate interventions on the electrical and plumbing systems. Ordinary maintenance is comparable to that of traditional houses. The extraordinary maintenance of concrete and brick houses is demanding; even simple interventions often require long times and high costs.

9. Warranty

The great durability of Kager wooden houses is confirmed by a 30-year guarantee on all structural parts. This is possible thanks to the correct management of humidity and the presence of thermal breaks. Traditional houses generally only offer the ten-year guarantee for serious defects as provided for by the Civil Code.

10. Investment

The market value of a Kager wooden house today is more than 10% higher than that of a similar traditional house, thanks to its durability and high energy efficiency. Traditional houses that are not energy efficient depreciate over time. Furthermore, the thickness of the thermal insulation in traditional walls removes up to 7% of the internal walkable surface compared to a Kager house.

Comparison of wooden houses


What makes a Kager house special compared to other wooden houses? To answer this question, we compared the main aspects that affect the quality of a wooden house and living well-being.

1. Custom-made homes

Each Kager wooden house is completely custom-made. We develop each project with absolute care, from foundations to finishes, to create your new home exactly as you have always dreamed of, without compromises.

Most companies in the wooden house sector create catalog houses with standard stylistic and functional solutions. Some manufacturers offer custom-built homes starting from predefined modules, with limited customization possibilities.

2. No restrictions on furnishings

Kager construction technology requires that each wall of the house has a structure capable of supporting suspended wall furniture. This allows for furniture design without constraints, with hanging solutions on both internal and perimeter walls, and the ability to change their layout as desired.

In many wooden houses, the furniture layout cannot be customized by the buyer because not all walls have sufficient capacity to support hanging furniture. For example, the kitchen must follow a predefined layout, preventing future changes to the furnishings.

3. Accessibility of the facilities

Thanks to the system compartment solution introduced by Kager and present in all our homes, it is possible to easily access an internal area of the walls dedicated to electrical and plumbing systems. This ensures that all subsequent maintenance or modifications to the systems do not cause concern.

In most wooden houses, the electrical and plumbing systems are arranged in specific positions depending on the house model, leading to technical difficulties and risks to the wall structure during subsequent maintenance or modification. Some manufacturers offer the system compartment solution as a paid option.


4. Natural materials

Kager uses completely natural materials for the thermal insulation of the walls. Wood fiber is a natural, breathable material, free from glues or added chemicals, offering the best thermal insulation performance.

Most wooden houses built throughout Europe use insulating materials derived from petroleum. These materials offer a compromise between cost and thermal performance but have a strong environmental impact and prevent proper wood transpiration. Some builders offer walls made from natural materials as a paid option.

5. Fire resistance

Fire resistance in Kager wooden houses is ensured by the adoption of a special technical sheet inserted in all internal and perimeter walls, which slows the advancement of the combustion front while protecting structural parts. The fire resistance of Kager structures is certified by Holz Forschung Austria, an independent European certification body.

Many companies, to keep costs low, produce wooden houses without this safety feature for all walls, resulting in partial resistance that does not guarantee structural integrity in case of a fire.

6. Breathability of wood

Using wood fiber as a thermal insulator means vapor barriers are not used in Kager house walls. Vapor barriers are synthetic materials with high thermal insulating power that prevent necessary wood transpiration. Wood, being a living material, requires adequate ventilation to resist environmental humidity over time.

Vapor barriers are standard in the wooden house sector because they guarantee high thermal insulation with limited dimensions and costs. However, they create ideal conditions for condensation and mold formation, risking the wooden structure’s durability.

7. High quality laminated wood

Kager construction technology uses only laminated wood for house structures. This material offers significant benefits in terms of resistance and stability over time, allowing greater design freedom without needing support pillars and metal carpentry in load-bearing structures.

A high percentage of wooden houses use solid wood for structural parts. Although this product is certified with the same reliability and safety level as laminated wood, it implies various design constraints due to its tendency to develop cracks and deformations.

8. No-gas houses only

All Kager wooden houses are built without a gas connection, reflecting Kager’s innovative character in both system technology and the casing. Most of the energy used comes from renewable sources.

Most manufacturers offer gas connections as a standard solution. When this complicates the customer (e.g., land not reached by a methane pipeline), the no-gas option is subject to a fee.

9. 35-year guarantee

Due to the high construction quality, Kager offers a thirty-year guarantee on all structural parts of its wooden houses. Almost all companies in Europe offer only the minimum ten-year guarantee required by law.

10. CE certification on the entire production process

Kager boasts CE certification for the entire production process, the most authoritative certification currently obtainable in Europe. Wooden house manufacturers typically obtain CE certification only on individual materials, not the entire production process.

11. Transparency policy

Kager commits to developing and proposing transparent, complete, and detailed estimates to offer certain costs and maximum transparency. We only indicate the products that have been selected for the project and that meet the customer and technical designer’s requirements.

One of the most common problems for those entering the wooden house world is the difficulty in understanding estimates from different companies. The complexity of the regulatory landscape and the tendency to provide partial indications on the technologies used often lead to difficult interpretation, risking significant variations during construction with a clear impact on final costs.

12. History

Kager is a company specialized in wooden houses, active in Europe for over 30 years. Choosing a builder who has contributed to the wooden house sector’s success guarantees safety and reliability throughout the process, from the contract to after-sales assistance.

The wooden house sector is growing in Europe, with more customers choosing to invest in green building, leading several companies to enter this market. Many companies, without a strong product culture, purchase and resell catalog products guided solely by price.

Seimic safety in real world – Kager House


The importance of seismic safety

To ensure safety, especially in today’s world, a house must guarantee high seismic resistance. Kager wooden houses, developed with decades of research, leverage the resistance and elasticity of wood to provide seismic resistance unparalleled in traditional masonry constructions.

A concrete example

The Kager wooden house shown in this image was built in the municipality of Argenta, in the province of Ferrara, just 42 km away from the epicenter of the 2012 Emilia earthquake.


How a Kager wooden house reacts to an earthquake

In the event of an earthquake, a Kager wooden house can excellently absorb the seismic waves, even of high magnitude. The characteristics of Kager construction technology allow for optimal controlled deformation, and the elasticity of the wood enables the structure to return to normal without consequences once the stresses have ceased. A fundamental role is played by the lightness of the structure, which results in smaller forces compared to a brick house.


«The surrounding houses were full of cracks, chimneys had collapsed, a disaster.
My Kager house, on the other hand, had not suffered any damage.”

 Max Salani
Owner of the Kager house in Argenta


The owner’s story

The earthquake had its epicenter in the municipality of Finale Emilia, just 42 km from Argenta, where a Kager house is located. Despite the extensive damage to buildings in the area, the Kager house remained unscathed. The homeowner, who was inside his home with his family at the time of the earthquake, recounts his experience: “The house was swinging, shaking, but I thought: ‘It’s an earthquake-proof house, it will resist.’”

Download a

Start your
project today