Built Up Roof Vs Modified Bitumen

Learn about two of the most popular flat roofing systems.

Built up roof vs modified bitumen.

What is the difference between modified bitumen and spray polyurethane foam flat roofing. However the type of materials used for the flat roofs depends a lot on your locality. Build up vs modified bitumen vs rubber membrane flat roofing. 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.

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. Pros of the build up roof. And roofers can pick from three commonly accepted methods of application hot asphalt heat and cold adhesive roofing installations. Bur consists of many layers.

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. It is more durable tougher and has redundancy you don t get with a single ply. January 22 2019 share the wealth. 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.

Built up roofing bur built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. Bit cap sheet if done correctly over any single ply membrane. This is not a requirement at all for modified bitumen roofing systems. Conventional built up roofs bur are known to require a heavy gravel cover significantly adding to the roofing job.

These roof systems are constructed with layers of felt and bitumen that provide a redundancy of durable protection. 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. According to experienced and knowledgeable corpus christi tx roofing contractors modified bitumen is the successor to traditional tar and gravel roofs. This caused the roof to underperform.

Modified bitumen displays the built in redundancy of asphalt built up as well as the uv resistance and flexibility of a modified membrane. Bur roof systems have been utilized for over 100 years in the roofing industry. Second although the gravel spread over a modified bitumen roof is intended to offer uv and hazard.