Modified Bitumen Roof Vs Built Up Roof

Modified bitumen displays the built in redundancy of asphalt built up as well as the uv resistance and flexibility of a modified membrane.

Modified bitumen roof vs built up roof.

A built up roofing system is installed by alternating layers of bitumen and reinforced fabric. If needed a base sheet can be fastened to the roof to create a flat and safe work space. Built up roofing the first layer can be adhered directly to the roof substrate. However these have now been replaced by modified bitumen.

This roof system has two types. This type of a roof could be installed with the cold adhesives the asphalts or the common torch method. You will never see actual gravel chunks of rock say 3 16 to 1 4 in size on a modified bitumen roof. In that case it could be set up by the owners of the property without much strain.

Built up roof bur vs modified bitumen roof torch down roofing construction questions. Strengthened by a polymer reinforced roof wear layer they boast excellent elasticity and flexibility to resist damage. The tar and gravel roof is built up of typically three to five layers of roofing felt. 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.

Benefits of bur and mod bit time tested defense. Second although the gravel spread over a modified bitumen roof is intended to offer uv and hazard. Modified bitumen what are bur and mod bit. This caused the roof to underperform.

I have a flat section of roof on my house that needs to redone. November 19 2014 9 48pm 1. In the 1970s modified bitumen roofing was introduced to the us roofing market and it quickly caught on. They mix a modifier with high quality asphalt in lieu of a heavy gravel cover to weather well.

The main benefit of this kind of a roof is that the peel and stick material is conducive for diy. I need some advice and or opinions about these types of roofs. Engineered modified bitumen roofing membranes originated in europe in the mid 1960 s and have been used successfully in the united states and canada since approximately 1975. I had this roof completely torn off and redone bur approx 11 years ago.

Atactic polypropylene app and styrene butadiene styrene sbs. Built up roofing systems were once a popular solution for commercial and other flat or low sloped roofs. Incredible durability modified bitumen systems share the proven performance of classic built up roofs burs. Bur roof systems have been utilized for over 100.

A plain tar and gravel roof also referred to as a built up roof or bur is quite different from modified bitumen.