First let s define what a tar gravel or built up roof bur is.
Residential built up roof.
Built up roof bur modified bitumen roof mbr and rubber membrane roof epdm.
Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.
Built up roofing bur built up roofing bur is an excellent option for flat or low slope roofs and is particularly effective for large commercial properties.
Roofs shall be covered with materials as set forth in sections r904 and r905.
Built up roofing also called bur is the most common roofing material used on low slope roofs.
Bur systems often called tar and gravel roofs are created with multiple layers of bitumen and roof felts that are sealed together.
This roofing option is popular among both residential and commercial properties.
Let s look at both solutions.
It is composed of alternating layers of reinforcing fabric and bitumen asphalt and is finished with a top layer of aggregate such as stone or gravel.
A built up roof or tar gravel roof as it is also known is layers of gravel or aggregate and bitumen.
From there the flat roof system you choose will determine the materials you apply.
Wally for the project kick off segment of the roofing it right miniseries on installing a commercial roof from start to finish.
Built up roofing bur is one of the most reliable and oldest ways to install low slope and flat roofs.
Bur is preferred for low slope or flat roofs because it creates a continuous sealed surface.
Whether you re an experienced commercial roofer a steep slope roofer thinking of adding low slope services or just like to learn from the best you ll want to join gaf senior commercial training specialists dave scott and wally brown dave amp.
A dependable choice for flat or low slope roofs built up roofing bur has long been popular for commercial applications.
One of the most common commercial roofing materials in use today it is also one of the oldest of the modern roofing options dating back to the early 1800.
With over 100 years of application built up roofing is time tested and tough enough for heavy foot traffic.
The bitumen is comprised of coal tar asphalt or other types of adhesives.
Pros and cons for flat roof materials all three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof.
Both solutions work on a little to no slope type of roof.