Contractors and builders use gravel on flat roofing for two primary reasons.
Tar roofing material.
Gravel is an excellent fire retardant.
Telltale signs of a coal tar pitch roof.
The first is to protect the underlying layer of roofing materials on built up roofs burs and the second is to secure or weigh down the roofing material as is the case with single ply flat roofs.
885 tropi cool 100 silicone seam and repair roof sealant.
What are tar gravel roofs or built up roofs.
Roofing tar will also protect your roof from wind and from snow and water which can collect on a flat roof.
Once made of tar paper these types of roofs gradually are using more advanced materials such as fiberglass membranes.
Roofing tar is a good choice for a flat roof as this kind of material is highly resistant to the ultraviolet rays from the sun.
Coal tar pitch roofing is a type of built up roofing in which coal tar pitch forms the waterproofing component of the roof membrane.
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.
Some components of tar roofing material are considered hazardous and therefore there are rules to ensure you dispose of it safely there are different procedures to dispose of tar roofing material that depend on what county or city you live in and you may need a permit before you begin a roof removal project.
Coal tar pitch is produced by distilling or heat treating coal tar which is a by product of the production of coke or coal gas.