Habitable basement concepts made in timber construction - Assessment on the durability of walls and floor slabs made of solid cross-laminated timber boards

摘要

This paper will present two ongoing R&D- projects concerning the development of highly-insulated, habitable basement concepts made in timber construction for energy-efficient residental homes. European basements are usually carried out in prefabricated or cast-in-place reinforced concrete. Due to increasing requirements for the thermal protection of the building envelope but also nowadays available modern techniques, highly-insulated timber constructions have become a possible and alternative purpose. Therefore together with two timber construction professionals several assemblies made of solid timber boards, planked with different insulation materials, were designed and regarding to their behavior in everyday life investigated. The main focus was to investigate the hygrothermal performance and probable durability of the developed wooden wall and floor slab assemblies. Hence primarily several transient calculations with special simulation tools were done, to assess their theoretical behavior. In addition to that, measurements on two full-scale experimental buildings have been started to validate the theoretical results. The agreement of in-situ measurements and simulation results within the course of the projects will enable the possible application of innovative timber constructions, also in highly stressed areas of the building envelope.