Why Put Stones On Flat Roofs

Your roofing merchants can supply the stones.

Why put stones on flat roofs.

Contractors and builders use gravel on flat roofing for two primary reasons. But as said the stones help the roof from bubbling etc from the sun. Specifically there are two main reasons to use a ballasted roof system. Having a large flat roof this is something that i pondered on too.

This is the protective cover that keeps the layers of tar and bitumen from deteriorating in the weather. The gravel prevents sun hail errant baseballs etc from damaging the membrane the all important moisture seal created by the tar paper and tar. No stones for us as it was a bay window. A layer of gravel or small stones is applied on top of the final coating of asphalt to protect the roof from the elements including.

There are different types and weights of gravel used on flat roofs for these purposes. We had to replace a big portion of our flat roof recently. What are tar gravel roofs or built up roofs. 2 to break up the rain into fine mists and keep the noise level down.

We used on a flat roof bitumen mastic to plug a hole we then painted with a water proof roofing paint. All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Stone is also used as a ballast for single ply membrane roofing. Here alternating layers of roofing felt usually fiberglass and hot applied asphalt are combined to create a long lasting roof system.

The chips act as a barrier between non solar reflective felt and the sun basically help prolong its life span of the felt if its green mineral on your new roof you will not have to chip it as the minerals are solar reflective. If the roof is a built up roof made with layers of tar and bitumenous sheets it creates a wear layer for the roof. Gravel to protect built up roofs. The stones force it to stay put.

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. On more expensive mebrane rooves you dont need pebbles. For mineral based felting the pebbles are there to help protect the felting as ballast depending on the fitting type and to help prevent water pooling aparantly. The stones does 3 things 1 help to keep the roof fire resistance.

A built up roof bur sometimes called a tar and gravel roof is a tried and true style of flat roof. There are several reasons flat roofs have stones. Built up roof bur the traditional hot tar and gravel. 3 to protect the roofing felt from perishing and heat melting the bitumen.