Structure

CLT (Cross-Laminated Timber).

CLT is one of the most climate-friendly construction materials. It stores CO₂ and can replace concrete and steel in most residential structures. Scandinavian CLT with certified timber is the best choice.

Key Figures

Carbon Footprint (GWP): −0.55 kg CO₂-eq/kg
Density: 500 kg/m³
Expected Lifespan: 100+ år

What is clt (cross-laminated timber)?

CLT is solid wood panels built from crosswise layers of structural timber. It combines timber's carbon sequestration with high load-bearing capacity and dimensional stability. CLT is used as a direct replacement for concrete in floors, walls and roof structures — with significantly lower climate impact.

Carbon Footprint Compared

CLT ← this material −0.55 kg CO₂/kg

Structural timber −0.72 kg CO₂/kg

Concrete 0.13 kg CO₂/kg

Steel 1.46 kg CO₂/kg

Negative carbon footprint (green) indicates carbon storage. Data based on EPD averages from ECO Platform and estimates per EN 15804.

Typical Applications

check_circle Floor slabs
check_circle Load-bearing walls
check_circle Roof structures
check_circle Facade elements
check_circle Stairs

In Renovation

CLT is used for extensions and adding extra storeys to existing buildings — precisely because it is lightweight. A lightweight top storey in CLT places much lower demands on existing foundations and structures than a concrete supplement.

Questions about clt (cross-laminated timber)

Is CLT strong enough for residential buildings?

Yes. CLT is approved for load-bearing structures up to many storeys. In Scandinavia, CLT buildings up to 18 storeys have been built. It has good fire resistance (charring protects the core) and high dimensional stability.

What does CLT cost compared to concrete?

CLT is typically 15–25% more expensive in material cost than concrete, but easier to install, faster to build, and gives lower total costs including foundation (lighter structure = lighter foundation).

Does CLT work in the Danish climate?

Yes, CLT is well-suited to the Northern European climate. Correctly built with vapour barrier and ventilated facade cladding, it performs well. It should be protected from direct moisture exposure.

Does CLT store CO₂ permanently?

CO₂ is stored as long as the building stands. If CLT elements are dismantled and reused in new structures, storage continues. CO₂ is only released again upon burning or decomposition.

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