Moisture Problems Overhead: Lightweight Concrete in Roofing and Waterproofing Applications

September 29, 2009
Publication: Construction Specifier p 34-41

Abstract: Roofing and waterproofing failures can stem from the use of lightweight structural concrete as the substrate for the membrane. Despite other advantages, this material can retain much more moisture than its traditional counterpart; it then releases this moisture more slowly. To date, the construction industry has not fully understood how this additional moisture can affect roofing and waterproofing systems and their components. This article explains the impact and offers suggestions for design professionals.