Gravel Built Up Roof

This case study shows what a typical gravel built up roof looks like when it is twelve to fifteen years old, and then after a polyurethane foam and the Diversified Coatings system is installed on a roof.

First we take off all the loose gravel on the roof and then clean the roof. In this case, we accomplish both by wet-vacuuming the roof. This ensures the polyurethane foam will adhere to the roof substrate. The foam is sprayed on the roof at a minimum of 1 1/2 inches to seal the entire roof area. Special care is taken around parapet walls and penetrations to make sure there is a tight seal.

After the foam was installed, we applied two coats of top coats to protect the foam from the suns ultraviolet rays. Without the coating, the foam would quickly break down. The foam and Diversified Coatings system gives the building owner not only an outstanding waterproof solution, but also an R10 insulation value for his building.

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