To speed up sheet membrane installation, the author cuts, dry-fits, and folds all sections before applying adhesive. First, he positions the cut sheet.
When the contact cement becomes tacky (which takes about 10 to 20 minutes), the author unfolds the loose end of the membrane.
With the front of the sheet laminated, he pulls the back portion forward and spreads contact cement for the rest of the sheet.
For a flat and leakproof seam in the sheet membrane, the author lays down two beads of manufacturer-supplied sealant.