Step 1: Prep
Roof Preparation
The roof surface is prepared for the foam installation. The foam does not rely on the old roof membranes for waterproofing. After a thorough preparation, the old membranes do make a good surface for 100% adhesion of the foam. We only remove the old roof membranes when it will improve the job. Leaving the old membrane in place and reusing it as a substrate for the new roof system reduces landfill waste and is good for the environment.
This tar and gravel roof is ready for step 1, roof preparation.
The tar and gravel roof above is a good candidate for a foam roof system. Before the foam roof system is applied several steps are taken including the following:
- All loose dirt and gravel is removed and hauled to a recycling facility.
- The tar membrane is secured to the roof deck.
- Deteriorated edge flashing and vent caps are replaced.
- Low areas are determined.
Other types of roof membranes that often make acceptable surfaces for foam roof application include cap sheet, single ply, and torch-down roof systems.
