We often discuss with clients/colleagues the role of U shaped membranes, which is a system applied at the bottom of timber based walls to prevent from rising moisture. Those membranes most of the time are bituminous and provide water tightness via a butyl based adhesive and are presented as the “final solution to the durability issues of timber buildings”. Is this right? (more…)
The answer of the question is complex and related to various aspect of the building process, mainly including the design. The durability of a timber structure can be compromised, but why does it happen? For an intrinsic physical limit of the material or are other factors that determine a considerable reduction of the life of the building? Does a careful study of the construction details help?
The window is a weak point in the envelope of the building and must therefore be considered very carefully during the design phase keeping in mind the following needs:
- Air / water / wind seal
- Limited effect of the thermal bridge and surface temperatures
When we went to see Diego Savio and Paolo Marchetto in their workshop in Trissino (VI), they reminded us of cyclists after a victorious uphill finish: very happy but at the same time exhausted by the effort. Tired because they started pedaling to bring their idea to life, over 3 years ago now as Diego mentioned.