Foam Roof Vs Tar And Gravel

A foam roof applied directly on a wood deck transmits noise into the homes interior.

Foam roof vs tar and gravel.

Gravel is an excellent fire retardant. 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. 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.

The final layer of a built up roofing system consists of stone or gravel. Spray polyurethane foam spf roofing. A plain tar and gravel roof also referred to as a built up roof or bur is quite different from modified bitumen. Said another way a roof requiring r19 insulation will receive about 3 inches of polyurethane foam.

Foam roofing can be rated with a r value of 6 25 per inch. Advantages of a tar and gravel roof. 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. If you are looking for an alternative to tar and gravel roofs that actually incorporates.

Foam roofs are extremely durable with high tensile and compressive strength. Maintaining a flat roof is much more difficult than standard pitched roofing. 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. 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.

Your tar and gravel roof is a good. Also a tar and gravel roof is very rugged and safe to walk on. The properly cleaned and prepare tar roof makes an excellent surface for a foam roof to adhere to. Through out the bay area many homes were designed using flat roofs to create their unique look.