BSH (glulam timber) is manufactured from native softwood from sustainably managed forests. The commonly used adhesives include either no formaldehyde or formaldehyde in such small quantities that the formaldehyde emission of engineered wood (E1 class) is significantly below fixed upper limits (up to 1m2/m3), also at high loading rates.
Preventative chemical wood protection according to DIN 68800-3 is, in compliance with the structural constraints of the DIN 68800-2, not required for the majority of designs. Customary designs can be assigned to the so-called hazard class “0”. The commonly used coatings to improve the cleanability of the surface and reduction of moisture absorption in transport and construction stages are solvent-free
Unlike with the use of structural components made of steel or reinforced concrete, analysis shows that the product within its entire working life results in a negative primary energy demand. This means that in thermal utilization at the end of its working life and substitution of fossil fuel associated with it, CO2 is saved. The product declaration prepared in 2010 for the registered association Holzleimbau study (Studiengemeinschaft Holzleimbau) can be downloaded here.