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Residential Roof Consultant ~ Unbiased Advice ~ Independent Oversight
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BUR
The BUR (built-up-roof) system incorporates a double or triple layer of ply sheet interspersed with hot liquid asphalt over a fiberglass base sheet. Also referred to as a “hot tar” roof, this roofing product, while once quite common in the residential industry, today is found predominately in commercial applications. BUR roofs are available in the following installation methods:
|
BUR Style |
Application |
UV |
Manufacturer's Warranty (Years) |
Realistic Life |
|
3-Ply and 4-Ply |
Commercial flood coat |
Required |
10 - 20 |
10 - 15 |
|
3-Ply and 4-Ply |
Tar and gravel / rock |
Not required |
10 - 20 |
10 - 15 |
|
3-Ply and 4-Ply |
With granulated cap sheet |
Not required |
20 |
20 |
Pros
- Cost effective
- Resistant to seam failure
- Low maintenance on systems not incorporating gravel or rock
- No open flame on roof
Below are links to several manufacturers’ sites. Remember that manufacturers’ web sites are designed to promote their products and will generally provide you with only positive product information.
You can count on Seattle Roof Advisor to provide unbiased advice.
Cons
- Limited qualified installers
- High maintenance on systems incorporating gravel or rock
- Extreme spill hazard in material handling
- Temporary unpleasant odor during installation
- Limited life expectancy
The built-up roof system had long been the most common roof system used on low-pitch installations, but has been replaced in virtually all residential applications by bitumen-backed, single-ply and other membrane systems.
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