Neue Lösungen zur energetischen Sanierung von Fachwerkhäusern

Since many timber-framed houses are listed, a practicable compromise between thermal rehabilitation and preservation of the historic appearance and fabric must be found. Mostly the thermal protection can only be achieved by applying thermal insulation to the interior side of the exterior wall. But since interior insulation lowers the temperature between insulation layer and filling material and thus raises the humidity level, such measures are not without risk. The choice of a suitable type of insulation and an appropriate type of assembly must be made with proper consideration of the hygrothermal conditions at the timberframed façade. It has been investigated to which extent the moisture problems created ba an interior insulation can be mitigated by applying a moisture-adaptive vapour retarder or by using a capillary active insulation material. Another novel approach consists of using the insulation as part of the infill. A newly designed infill assembly is presented whose performance has been demonstrated by outdoor exposure tests and hygrothermal simulations