Bales of straw, wood and clay – renewable raw materials from close by – can be used to easily build highly thermally insulated, salubrious and eco-
In contrast to the historic examples set by the settlers, today timber frames are filled with bales of straw. In Germany this load-
Healthy homes from nearby fields
The essential components of straw bale buildings – wood, clay and crop straw – are renewable and therefore almost indefinitely available. Using clay as natural plastering provides a comfortable and healthy indoor climate as well as an optimal compensation of moisture. The building owners can save money by helping to embed and plaster the bales of straw.
Features of structural engineering
Moisture in straw bales outdoors will not raise a problem if a construction pervious to vapor plus an adequate exterior cladding are being used. They also need to be effectively protected against driving rain. The indoors plastering has to be free of cracks and as airtight as possible. That way, neither rodents and vermin nor mildew, wind and weather can harm professionally installed bales of straw.
Straw bales provide an excellent thermal insulation – a wall 35 cm in width equates to passive house standard. U-
Approval of German building laws
According to German building supervision, bales of straw are permitted as insulant since 2006. Furthermore, for deviant construction projects an individual approval under building law can be requested and will generally be approved without any difficulty. A general certification report by the building supervision guarantees the applicability as a fire-