Gravel Flat Roofs

To weigh down or secure the roofing material as is the case with single ply flat roofs.

Gravel flat roofs. Also a tar and gravel roof is very rugged and safe to walk on. Built up flat roof replacement. It provides excellent protection against uv rays and is an attractive option for windows and decks that overlook the roof. For many people the built up roof is what comes to mind when they think of flat roofs.

However if epdm roofs are spray applied then the chance of the seams pulling away from the roof is significantly lowered. As protection the stones absorb some of the sun s. Gravel roof disadvantages on the other hand gravel roofs are hot energy inefficient heavy moisture trapping and unstable. Of all the flat roofing options a tar and gravel roof is the most economical.

To protect the underlying layer of roofing materials as is the case with built up roofs burs. Gravel is an excellent fire retardant. Gravel is used on flat roofs for two reasons. It also provides protection from foot traffic.

They provide a loading coat and they afford uv protection. Roof gravel provides a protective layer to flat roofs reducing the weather damaging effects from uv rays and heavy snow hail and wind. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. 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.

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. There are different types and weights of gravel used on flat roofs for these purposes. 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. As ballast the gravel will help anchor the material underneath and lower the risk of it being blown off in high winds.

Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. Gravel and pea shingle have two primary purposes on a flat roof. 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. 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.

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. A built up flat roof bur is made up of tar and gravel. Gravel flat roofs and pea shingle flat roofs.