Why Do You Put Gravel On Flat Roofs

First of all it weighs down the covering surface of the roof and secondly it protects the roof from sun damage.

Why do you put gravel on flat roofs. Most flat roofs traditionally have tar applied over the roof decking to make it watertight. As ballast the gravel will help anchor the material underneath and lower the risk of it being blown off in high winds. Contractors and builders use gravel on flat roofing for two primary reasons. There are different types and weights of gravel used on flat roofs for these purposes.

So all you need to be able to say to your roof contractor is you want an epdm rubber roof. To protect the underlying layer of roofing materials as is the case with built up roofs burs. Walking on the tar would hurt the tar s seal fast. Gravel on a flat roof is important for two reasons.

Why do you put gravel on a flat roof. They provide a loading coat and they afford uv protection. 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. 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.

Walked on gravel tends not to hurt the seal of the tar underneath. Also the gravel acts as a wick to pull up any water left on the roof after scuppers or gutters lead excess water away. A built up roof bur. Gravel and pea shingle have two primary purposes on a flat roof.

These roofs are installed as thin sheet materials 0 030 30 mils to 0 060 inches 60 mils thick and are applied to the roof in a single layer. Gravel to protect built up roofs. To weigh down or secure the roofing material as is the case with single ply flat roofs. The gravel covers a tar roof.

Gravel is heavy and concentrations of gravel can contribute to roof deck deflection low areas.