How long does a BUR roof last?
20 to 30 years
A built-up roof (BUR) is a layered roof that is typically used on flat roofs with a very slight pitch. BUR roof pros include being fire-resistant and inexpensive. The average lifespan of BUR is 20 to 30 years, depending on the climate and the particular materials that it’s made of.
What does bur mean in roofing?
built up roof system
A built up roof system is a popular choice for buildings with low-slope or flat roofs. Often referred to by the acronym BUR, this system has been used for 100-plus years in the U.S.
What is 4 ply built up roofing?
A 4-Ply roofing system involves roofing felts that are typically four plies composed of layers of reinforcement such as fiberglass or polyester felts, with each ply being embedded in a full bed of hot asphalt/bitumen.
Can a built up roof be repaired?
The following method of repair is only applicable to roof systems that are asphalt-based. If your roof assembly is a single-ply membrane, such as EPDM or TPO, the application of asphalt repair material to the surface of the membrane can damage the membrane and lead to a much larger patch or even full replacement.
What is the best material to use for flat roofs?
For many projects, PVC roofing is our preferred choice as the best flat roof material on the market. PVC roofing is somewhat more expensive than other single-ply commercial roofing materials, however it offers a wide range of benefits for the price.
Is TPO single ply?
Thermoplastic Polyolefin is a single-ply roofing membrane that is one of the fastest-growing commercial roofing systems on the market. TPO roofing systems are made up of a single layer of synthetics and reinforcing scrim that can be used to cover flat roofs.
Which type of flat roof is best?
EPDM Membranes Quite possibly the best flat roofing membrane, EPDM is a relatively low-cost flat roof material that offers a number of significant advantages. Clean, straightforward installation, incredible strength, a long lifespan, and a smart finish combine to make EPDM membranes a difficult one to beat.
How thick is a built-up roof?
between two to four inches
How thick is built-up roofing? A BUR roof system comes in multiple layers, most often between two and four. The thickness depends on the materials used and the number of built-up roofing layers applied, but typically the selvage area ranges between two to four inches.
How much does built-up roofing weight?
Table of Roofing Material Weights
| Weight of Roofing Materials | ||
|---|---|---|
| Built-up Roof Membrane 4-Ply, Gravel-Surfaced | 6.3 lbs | 630 lbs |
| Built-up Roof Membrane 4-Ply, Smooth-Surfaced | 2.58 lbs | 258 lbs |
| Clay Tile Roofing | 6 – 15 lbs | 600 – 1500 lbs |
| Concrete Tile Roofing | 6 – 11 lbs | 600 -1100 lbs |