Built-Up Roofing

The term built-up roof or BUR refers to a system of multiple layers of felt applied either with hot asphalt or cold application cement, surfaced with various materials. These roof assemblies have a good life expectancy, normally in the range of 15 to 25 years.

Coal tar BURs are best utilized when roof areas have a very low slope and water is likely to collect. Coal tar is completely impervious to ponding water, which is a trait few other roofing materials can claim. Coal tar also has a low melting point, which means that in the summer months, the coal tar becomes fluid and “self-heals.”

Single Ply Roofing

Single ply roofing involves a rubber roof membrane that is applied with or without adhesive and is sealed and fastened at the laps of the material. Laps are sealed with special hot air welders or special lap adhesives. Heat welding is the preferred method of sealing. We work with a range of membranes and specialize in EPDM, TPO, and PVC single ply roofing.

• Ethylene Propylene Diene Monomer (EPDM) is an elastomeric membrane and a high performance roofing choice. It is highly resistant to tears, impacts, punctures, and normal roof traffic. This membrane also provides excellent resistance to ozone and ultraviolet exposure, retaining pliability through wide temperature variations.
• Thermoplastic Polyolefin (TPO) is a high quality reinforced membrane with superior tear strength and stability.
• Polyvinyl Chloride (PVC) is an energy efficient, fiber reinforced, lightweight roof membrane.

Modified Bitumen Roofing

Modified bitumen roofing systems consist of asphalt with added modifiers to increase the roof’s durability properties. These types of roofing systems are usually applied with heat welding, though they are occasionally applied with cold adhesive. The types of additives used as modifiers are known as SBS and APP.

• Styrene-Butadiene-Styrene (SBS) "rubber" modifier additive is combined with a premium asphalt flux to provide an asphalt-blended coating that has elongation and recovery properties, better able to deal with the stresses created by wind, temperature fluctuation, and normal roof-top expansion and contraction.
• Atactic Polypropolyene (APP) "plastic" modifier additive is combined with the asphalt to provide a tougher, better weathering asphalt coating that can be heat welded or applied with cold adhesive. The APP blend is more plastomeric than the elastomeric SBS blend, so it will not have the recovery properties associated with the SBS products.