Roof Gravel Weight

There are different types and weights of gravel used on flat roofs for these purposes.

Roof gravel weight.

Generally the weight for a gravel coated roof must be within 10 25 pounds per square foot. Contractors and builders use gravel on flat roofing for two primary reasons. To weigh down or secure the roofing material as is the case with single ply flat roofs. Gravel is used on flat roofs for two reasons.

To protect the underlying layer of roofing materials as is the case with built up roofs burs. Sika s experts provide assistance to benefit your business. Felt tar and gravel roofing 4 ply 5 3 lb m ft 2 25 9 kg m 2 felt tar and gravel roofing 5 ply 6 1 lb m ft 2 29 8 kg m 2 felt tar and slag roofing 3 ply 4 5 lb m ft 2 22 kg m 2. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m2.

The single ply membrane and other roof components including thermal insulation are loose laid. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. Gravel to protect built up. 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.