Foam Roof Vs Tar And Gravel

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.

Foam roof vs tar and gravel.

Through out the bay area many homes were designed using flat roofs to create their unique look. 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. Foam roofing can be rated with a r value of 6 25 per inch. Of all the flat roofing options a tar and gravel roof is the most economical.

Your tar and gravel roof is a good. A plain tar and gravel roof also referred to as a built up roof or bur is quite different from modified bitumen. The tar and gravel roof is built up of typically three to five layers of roofing felt. Spray polyurethane foam spf roofing.

Also a tar and gravel roof is very rugged and safe to walk on. Maintaining a flat roof is much more difficult than standard pitched roofing. In 1974 dissatisfied with performance of traditional tar and gravel built up roofing bur systems the physical plant department began looking for viable roofing alternatives the bur roofs were constantly leaking and because of the nature of bur leak detection was virtually impossible. Gravel is an excellent fire retardant.

Foam roofs are extremely durable with high tensile and compressive strength. The properly cleaned and prepare tar roof makes an excellent surface for a foam roof to adhere to. A foam roof applied directly on a wood deck transmits noise into the homes interior. Said another way a roof requiring r19 insulation will receive about 3 inches of polyurethane foam.

Advantages of a tar and gravel roof. If you are looking for an alternative to tar and gravel roofs that actually incorporates. The surface texture of a foam roof applied over an existing tar roof is more uniform than if the tar roof were removed. By texas a m laboratories.