Gravel Flat Roofs

Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed.

Gravel flat roofs.

Built up roof bur the traditional hot tar and gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone. It provides excellent protection against uv rays and is an attractive option for windows and decks that overlook the roof. Roof gravel provides a protective layer to flat roofs reducing the weather damaging effects from uv rays and heavy snow hail and wind. Gravel roof disadvantages on the other hand gravel roofs are hot energy inefficient heavy moisture trapping and unstable.

For many people the built up roof is what comes to mind when they think of flat roofs. Built up flat roof replacement. Our roof gravel is available for delivery in tunnel lift bulk bags allowing an easy method of transporting the gravel onto a roof using a crane not provided. 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.

There are different types and weights of gravel used on flat roofs for these purposes. It also provides protection from foot traffic. Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. To protect the underlying layer of roofing materials as is the case with built up roofs burs.

Gravel and pea shingle have two primary purposes on a flat roof. Bur consists of many layers. Gravel is used on flat roofs for two reasons. However if epdm roofs are spray applied then the chance of the seams pulling away from the roof is significantly lowered.

Just enough slope to drain water but also flat enough to be a problem if not constructed properly. Gravel flat roofs and pea shingle flat roofs. They provide a loading coat and they afford uv protection. A bottom layer or two of insulation board multiple intermediate layers of tar or asphalt alternated with layers of roofing felt and a top layer of gravel.

Also a tar and gravel roof is very rugged and safe to walk on. Of all the flat roofing options a tar and gravel roof is the most economical. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. To weigh down or secure the roofing material as is the case with single ply flat roofs.

As ballast the gravel will help anchor the material underneath and lower the risk of it being blown off in high winds. Gravel roof advantages most gravel roofs are inexpensive to build offer some protection to vulnerable asphalt against uv damage and the stones are very durable. As protection the stones absorb some of the sun s.