Frame construction is growing in popularity. The damp insulation of the foundation sill plate is one of the most essential elements when constructing the foundation of a timber-framed building. Griltex, having 60 years of experience in the manufacture of geosynthetics for waterproofing, has designed a state-of-the-art solution that integrates a waterproofing membrane with a barrier against the flow of air from the outside into the building.