What is required before applying a peel and stick waterproof membrane on a foundation?

Using an approved primer before the installation of a peel and stick waterproof membrane is crucial for ensuring optimal adhesion to the foundation surface. The primer promotes better bonding of the membrane to the substrate by creating a suitable surface that the adhesive can effectively adhere to. It helps in sealing the substrate and can enhance the overall performance of the waterproofing system.

In addition to improving adhesion, the primer often helps to fill in any small voids or irregularities in the substrate, which can otherwise compromise the integrity of the waterproofing. Proper preparation of the surface with a primer is a fundamental step in the application process, minimizing the risk of failure and ensuring longevity in the waterproofing solution.