Flat Roof Felt Thickness

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot.

Flat roof felt thickness.

The flat roof is torch on bitumen with torch on flashing this roof has been patched repaired previously torch on felt roofs have an approximate life span of 10 12 years merely as a covering. It s available in rolls that are 8m long and 1m wide with a thickness of 4 2mm mineral or 3 8mm sand. There are two types of flat roof. Ikopro solvent free water proofer is an easy to use bitumen based emulsion for roofs.

We would recommend a different covering such as grp fibre glass. The best weight for roofing felt is the 30 pound product because it provides thicker and stronger footing for roofers that does not tear out especially on steep roofs where footing is critical. However over the last few decades new and advanced materials have been developed. As the single ply roofing association spra points out this type of flat roofing is strong durable completely sealed and usually lasts at least 25 30 years.

Roofing felt s thickness is not a measurement of its depth because it is thin similar to heavy paper. Anderson tecnatorch sbs torch on mineral felt capsheet is used as the final layer of the felt roofing process. Most flat roofs are typically not as long lasting or durable as sloped ones because the latter shed snow and rain a lot quicker. Cold roofs and warm roofs.

Roofing felt s thickness is actually measured in pounds per square with one square equaling 100 feet of roofing material. The most commonly used felts are 15 and 30 with weights of 8 and 20 pounds per 100 square feet respectively. A classic flat roof is either almost completely level or has a very slight pitch of 3 in 12 inches or less. The product can be used as a waterproofing coating on asphalt fibre cement sheeting concrete and bituminous roofing membranes.

Of course how many rolls you need will depend on the size of the roof so ensure you measure correctly. Here alternating layers of roofing felt usually fiberglass and hot applied asphalt are combined to create a long lasting roof system. A built up roof bur sometimes called a tar and gravel roof is a tried and true style of flat roof.