Pros of the build up roof.
Modified bitumen vs built up roof.
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.
Second although the gravel spread over a modified bitumen roof is intended to offer uv and hazard.
Conventional built up roofs bur are known to require a heavy gravel cover significantly adding to the roofing job.
Flat roofs are one of the most popular roofing designs and yet still one of the best investments for most of the facilities.
Modified bitumen mb roofing is an asphalt based close cousin of the built up roof bur designed for buildings with low slope or flat roof structures.
If needed a base sheet can be fastened to the roof to create a flat and safe work space.
January 22 2019 share the wealth.
Modified bitumen displays the built in redundancy of asphalt built up as well as the uv resistance and flexibility of a modified membrane.
However the type of materials used for the flat roofs depends a lot on your locality.
There are 3 main types of flat roofing systems.
This prevent leaks mold and rot all of which can weaken the roofing structure and cause costly damage.
This caused the roof to underperform.
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.
Built up roofing the first layer can be adhered directly to the roof substrate.
Build up vs modified bitumen vs rubber membrane flat roofing.
A built up roofing system is installed by alternating layers of bitumen and reinforced fabric.
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.
A plain tar and gravel roof also referred to as a built up roof or bur is quite different from modified bitumen.
Bur roof systems have been utilized for over 100 years in the roofing industry.
These roof systems are constructed with layers of felt and bitumen that provide a redundancy of durable protection.
You will never see actual gravel chunks of rock say 3 16 to 1 4 in size on a modified bitumen roof.
Each system is designed to waterproof the roof and protect it from sun rain snow and more.
And roofers can pick from three commonly accepted methods of application hot asphalt heat and cold adhesive roofing installations.
Having worked with most and specified several i can tell you i prefer a built up roof with a mod.
It is more durable tougher and has redundancy you don t get with a single ply.
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.
Built up roof bur modified bitumen and single ply.
