Built Up Roof Vs Modified Bitumen

Bit cap sheet if done correctly over any single ply membrane.

Built up roof vs modified bitumen.

Having worked with most and specified several i can tell you i prefer a built up roof with a mod. According to experienced and knowledgeable corpus christi tx roofing contractors modified bitumen is the successor to traditional tar and gravel roofs. January 22 2019 share the wealth. 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.

Built up roofing bur built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. 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. What is the difference between modified bitumen and spray polyurethane foam flat roofing.

These roof systems are constructed with layers of felt and bitumen that provide a redundancy of durable protection. 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. Flat roofs are one of the most popular roofing designs and yet still one of the best investments for most of the facilities. Learn about two of the most popular flat roofing systems.

However the type of materials used for the flat roofs depends a lot on your locality. Conventional built up roofs bur are known to require a heavy gravel cover significantly adding to the roofing job. And roofers can pick from three commonly accepted methods of application hot asphalt heat and cold adhesive roofing installations. It is more durable tougher and has redundancy you don t get with a single ply.

This is not a requirement at all for modified bitumen roofing systems. A single ply just offers a cleaner easier solution but without the longevity of a built up roof. 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. Bur consists of many layers.

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 displays the built in redundancy of asphalt built up as well as the uv resistance and flexibility of a modified membrane. This caused the roof to underperform.