In KAGER architecture, wood is more than just a construction element. It’s a core part of a living philosophy — one that values timelessness, sustainability and a strong connection to nature.

Wood as an architectural material — with responsibility

But natural materials are not inert. They require thoughtful protection, as they’re affected by both weather and time. With the right care and protection, wood can remain beautiful and stable for decades. Sunlight — our most important source of natural light — is also one of the main elements that impacts the durability and appearance of exposed wooden surfaces.

 

The impact of sunlight on wood

Natural materials inevitably respond to external conditions. UV rays break down lignin in the wood, leading to fading, loss of sheen, surface roughness and cracking. The most exposed elements are typically located on the south and southwest façades, as well as on open architectural features such as pergolas and overhangs.


This is why, in every KAGER house, wood protection begins at the design level. Shading systems, deeper eaves and well-placed overhangs reduce direct exposure and significantly prolong the lifespan of the timber structure. Yet orientation alone is not enough — protection also depends on careful material selection and preparation.

Protection starts in production

All load-bearing structures are made from glued laminated timber (BSH), known for its high strength and long-term dimensional stability. BSH consists of multiple layers of technically dried timber, bonded together under precisely controlled conditions. By removing knots and imperfections, and aligning the grain in alternating directions, we reduce internal stresses, prevent warping and minimize the risk of cracks.


Protection begins in our production facility. Every visible wooden element is hand-inspected, sanded and coated with a base finish that reduces moisture and heat absorption. Connections and joints are designed to prevent water retention or localized stress in the timber. These early steps reduce future maintenance needs and help preserve the long-term value of your home.

 

Wood quality and certifications

The value of wooden surfaces lies not only in their appearance, but in their certified origin, technical compliance and responsible sourcing. All timber used in our homes is PEFC™ certified, guaranteeing it comes from sustainably managed forests.


Our production complies with the European EN 14080 standard for BSH glulam timber and is CE-marked, confirming mechanical strength and construction safety. We also meet the RAL quality mark and the demanding German DIN 1052 standards. Together, these certifications ensure consistently high levels of quality, safety and material integrity.

How often is maintenance needed?

Even the best timber needs occasional care. The protective finish on wooden surfaces must be renewed periodically, depending on the type of coating, degree of exposure and local conditions.

Recommended intervals:

  • Translucent coatings (lazures): Every 2 years on average — or sooner for highly exposed areas (e.g. high-altitude locations, direct sun).

  • Opaque coatings (which fully cover the wood’s texture): Last around 5 years before reapplication.

What matters most is not the calendar — but the surface condition. Signs like fading color, roughness or water not beading on the surface are clear indicators that it’s time to recoat. Regular inspections help avoid costly interventions and preserve the aesthetic value of your home.

 

 

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