How long should a membrane be allowed to relax before proceeding with localized shrinkage repair in single-ply systems?

Allowing a membrane to relax for 30 minutes before proceeding with localized shrinkage repairs in single-ply roofing systems is critical to ensure that the material has stabilized. When a membrane is installed, it can have built-up tension due to the stretching applied during installation. This tension can cause issues such as warping or improper adhesion if repairs are attempted too soon.

By allowing this specific time frame for the membrane to relax, crews ensure that the material has time to settle and will conform more accurately to the intended placement without excessive strain. This practice contributes to the longevity and effectiveness of the repair work, minimizing the likelihood of future issues associated with improper installation or tension in the membrane.

Longer relaxation periods than needed might not significantly enhance the repair process, while shorter periods could lead to potential failures. Hence, 30 minutes strikes the right balance between allowing adequate relaxation and maintaining workflow efficiency on the job.