KLH, by the nature of its product, is a specialist in sustainable construction.

We promote the use of timber in lieu of concrete and steel, as timber is the only truly renewable construction material, with the lowest energy consumption of any building material across its lifecycle.  Using cross-laminated timber will reduce CO2 because trees act as a carbon 'sink' removing CO2 from the atmosphere, releasing oxygen and sequestering/storing carbon.

1m3 (480-500kg/m3) of KLH panels will remove approximately 0.8 tonnes of CO2.  The CO2 is absorbed by the timber and ultimately the carbon stored/sequestered (and oxygen released).  Therefore, 1m3 of KLH panels will have approximately 240-250kg of 'lock-in'carbon.

In comparison, the production of Portland Cement results in around 870kg of CO2 emissions per tonne of cement ("The cement industry's role in climate change", Dr Robert McCaffrey, Global Cement & Lime Magazine); the production of steel results in around 1.75 tonnes of CO2 emissions per tonne of steel (The Carbon Trust); and substituting GGBS Cement - ground granulated blastfurnace slag (typical mix 40 - 50%) - may reduce CO2 emissions in concrete, but only by around 100 - 130kg per tonne (Ecocem).

The use of timber in the construction of buildings can achieve negative net CO2 emissions.