Built Up Roof Vs Modified Bitumen

A single ply just offers a cleaner easier solution but without the longevity of a built up roof.

Built up roof vs modified bitumen.

Modified bitumen displays the built in redundancy of asphalt built up as well as the uv resistance and flexibility of a modified membrane. First although an app modified bitumen roof is designed to resist uv light damage blistering cracking and oxidation a lack of standards led some manufacturers to skimp on the addition of the app modifier. Build up vs modified bitumen vs rubber membrane flat roofing. Bit cap sheet if done correctly over any single ply membrane.

Built up roof membranes bur and modified bitumen mod bit are generally composed of alternating layers of bitumen and reinforcing fabrics that create a finished membrane. Modified bitumen is a roofing membrane consisting of asphalt and plastic or rubber polymers and is therefore widely considered an evolution of asphalt built up roofing bur. It is more durable tougher and has redundancy you don t get with a single ply. This caused the roof to underperform.

Second although the gravel spread over a modified bitumen roof is intended to offer uv and hazard. Bur consists of many layers. January 22 2019 share the wealth. According to experienced and knowledgeable corpus christi tx roofing contractors modified bitumen is the successor to traditional tar and gravel roofs.

And roofers can pick from three commonly accepted methods of application hot asphalt heat and cold adhesive roofing installations. Conventional built up roofs bur are known to require a heavy gravel cover significantly adding to the roofing job. A bottom layer or two of insulation board multiple intermediate layers of tar or asphalt alternated with layers of roofing felt and a top layer of gravel. All roofing materials can offer this particular perk but the most affordable ones are modified bitumen roofs and tar and gravel or built up roofing bur.

Learn about two of the most popular flat roofing systems. Pros of the build up roof. Built up roofing bur built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. These roof systems are constructed with layers of felt and bitumen that provide a redundancy of durable protection.

This is not a requirement at all for modified bitumen roofing systems. However the type of materials used for the flat roofs depends a lot on your locality. Bur roof systems have been utilized for over 100 years in the roofing industry.