What is built-up roof membrane?
Built-up roofing systems are an evolution of the asphalt roofing method. As compared to other roofing materials (such as metal roofs), BUR roofing membranes are created through a layering process of bitumen and reinforcing fabrics. They are most commonly used on low-slope roofs or flat roofs.
What is built-up roofing system?
As a system, built-up roofing (BUR) is a type of asphalt roofing that has been around for more than 100 years. It is one of the most common materials used on low-slope or flat roofs. They can also be used in combination with modified bitumen.
What are the layers of a built-up roof?
Built-up roofing systems are most commonly applied with three or four layers of roofing materials to make up the complete roofing system. These layers are typically a base sheet, a fiber sheet, and then either one or two layers of bitumen.
What is a built-up reflect roof?
Built-up roofs consist of several layers of reinforcing materials embedded in waterproofing materials. A coating of gravel, granules, or a reflective coating protects the surface from UV light.
What are three common problems you’ll find on modified bitumen roofs?
List 9 common problems you will find on modified bitumen roofs. old; openings at seams and flashing; surface cracking; loss of granules; slippage; punctures; ponding; patching.
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.
How much does a new built up roof cost?
The average roofing installation price for a tar and gravel (built up) roof costs anywhere between $3,750 to $6,750 depending on the slope, pitch, and size of your roof. You can expect to pay $2.50 to $4.00 per sq. foot or $250 to $400 per square installed on a standard sized single story home.
How is built up roofing applied?
ARMA defines a built-up roofing system as a roof where multiple layers of asphalt alternated with ply sheets (felts) are applied over the roof deck (vapor retarder) and, most often over insulation that is attached to the roof decking.
How many layers will a typical built up roof covering have?
This system is a series of multiple layers of asphalt-impregnated sheets of felt paper and hot asphalt. Most built-up roof systems are comprised of three layers of felt and asphalt. The top of the roof system is then covered with a gravel surface to protect the asphalt from ultraviolet (UV) rays of the sun.
Can I walk on a bitumen roof?
Flat Roof Surfaces You Can Walk On Whether its BUR (Built-up Roofing), TPO (Thermoplastic polyolefin), Modified Bitumen, or Single Ply Roofing, your roofing professional can apply the right waterproofing membrane to make it possible to walk on.
Can you walk on a modified bitumen roof?
Can you walk on a modified bitumen roofing system? Yes. Well-installed MB roofing is designed to withstand foot traffic. For areas that support building equipment or heavier foot traffic, the roof can be appropriately reinforced.
How do you find a leak on a built-up roof?
How To Locate a Flat-Roof Leak
- Clear the Roof. It is easier to identify signs of damage on a roof that is free of debris such as fallen leaves or branches.
- Check Flashing, Collars and Seams.
- Examine the Condition of Patching.
- Look for Low Spots.
- Try the Hose Test.
How do you install a built up roof?
Built Up Roof Labor, Basic. Basic labor to install built up roofing with favorable site conditions. Clear roof surface of debris. Apply base sheet. Glue, secure and prime flashing. Apply 3 plys with hot mopping between each ply. Paint exposed flashing cement with UV resistant coating.
What is built up roof system?
A built-up roof, most of the time referred to as BUR, is a time-tested roofing system typically comprised of hot tar and gravel. It is made up of many layers and typically the top layer is where the tar and gravel lie. This is a system that has been around and in demand for ages.
What are built up roof shingles is called?
Built-up roofing, also called BUR , is the most common roofing material used on low-slope roofs. 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.
What is built-up roofing (BUR)?
A built-up roof (BUR) is the most widely used material for covering flat roof surfaces. These roofs have been used for well over a century, and are made from multiple layers of reinforced fabric joined by a binding agent, or bitumen.