A shingled roof definitely has its list of advantages. Asphalt shingles are resilient and offer a fairly long lifespan for most homes. However, if it is time to replace or cover up those roofing shingles, you may want to consider having them covered with a foam roof. Because foam roofing can be applied over existing roofs, the shingles themselves don't have to be removed before the new roof goes in place. While this is one great advantage, most homeowners don't quite understand how a foam roof is applied over asphalt shingles. Here is a closer look at the installation process of foam roofing over shingles so you can get a better understanding of the process:
The asphalt roof is prepared for the installation.
Foam roofing systems are basically sprayed in place by the contractor. But before this can be done, the shingles themselves and the rest of the existing roof has to be prepared for the process. The contractor will:
- Properly anchor down any loose or broken shingles
- Seal off the outer perimeter of the roof and gutter system
- Close off any openings and protrusions on the roof, such as vent pipes and chimneys
Additionally, steps will be taken to ensure the shingled roof is mostly level so the proper distribution of the foam roofing system is easier to achieve.
The initial layers of foam are applied to the roof.
A foam roof is actually more than one layer of material. The first layer that goes into place over the shingles is the polyurethane foam that creates the waterproof barrier between the elements and the roof of the home. This layer of foam can be made of different components and can be installed at different thicknesses depending on the makeup of the roof and the specific system going into place. One of the top advantages of foam roofing is it slightly expands during installation to perfectly seal even the smallest cracks.
The upper layer of rigid material is applied to finish the roof.
The foam itself creates an excellent protective layer, but most foam roofing systems are finished with a final layer of rigid material to give the roof a more naturally roofed appearance. This upper layer of rigid material also gives the fam a more resilient structure overall that is better able to deal with moisture and weight. The rigid finish can be made of different materials, including some aggregate-type filler ingredients that provide an attractive textured finish.
Check out a website like http://www.durafoaminc.com for more information and assistance.