Foam Roof Vs Tar And Gravel

Also a tar and gravel roof is very rugged and safe to walk on.

Foam roof vs tar and gravel. Spray polyurethane foam spf roofing. By texas a m laboratories. The surface texture of a foam roof applied over an existing tar roof is more uniform than if the tar roof were removed. Built up roofs or burs also called a tar and gravel roof is a well established and popular style of flat roof that is made up of alternating layers of roofing felt or fiberglass and asphalt that is applied with heat which combine to make a long lasting sturdy roofing system.

Of all the flat roofing options a tar and gravel roof is the most economical. A plain tar and gravel roof also referred to as a built up roof or bur is quite different from modified bitumen. Your tar and gravel roof is a good. Spray polyurethane foam more commonly referred to as spf is a liquid that is sprayed on the existing roof and expands into a foam creating a solid layer across an existing roof.

Through out the bay area many homes were designed using flat roofs to create their unique look. The final layer of a built up roofing system consists of stone or gravel. Said another way a roof requiring r19 insulation will receive about 3 inches of polyurethane foam. Gravel is an excellent fire retardant.

As each layer is applied and mopped down using hot tar between layers we end up with not a single membrane but a multiple ply. A foam roof applied directly on a wood deck transmits noise into the homes interior. Advantages of a tar and gravel roof. Foam roofing can be rated with a r value of 6 25 per inch.

The tar and gravel roof is built up of typically three to five layers of roofing felt. It provides excellent protection against uv rays and is an attractive option for windows and decks that overlook the roof. If you are looking for an alternative to tar and gravel roofs that actually incorporates. Maintaining a flat roof is much more difficult than standard pitched roofing.