Bituminous Roofing Felt

Bituminous felt is a form of waterproof sheeting that is used to cover flat roofs or as an underlay beneath slate or tile roofing.

Bituminous roofing felt.

The substance itself is made from bitumen which comes from the distillation of crude oil that has been either mixed with sand or crushed limestone. These systems are sometimes used to construct roofs in the form of roofing felt or roll roofing products. Bituminous waterproofing systems are designed to protect residential and commercial buildings bitumen asphalt or coal tar pitch is a mixed substance made up of organic liquids that are highly sticky viscous and waterproof. 15 tarah astm 4869 type i is an 15 tarah astm 4869 type i is an authentic asphalt saturated organic felt underlayment is used as a breathable secondary weather resistant barrier when applied over the roof deck prior to the installation of the primary roofing product.

It should not be used over tar based products. Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe. Organic dry felt is made from 100 post consumer recycled material. One of the longer lasting roofing options for flat roofs is bitumen roofing or a modified bitumen roof.

Modified bitumen is a type of asphalt product that can be applied in a number of ways to the roof in both hot and cold temperatures.