Single-Ply System Products
EPDM or Rubber Roofing Systems
Ethylene Propylene Diene Terpolymer, EPDM for short, is most common in low slope, commercial roofing. EPDM has a great resistance to hail damage and a significant lifespan. EPDM is covered by manufacturer labor and material warranties, which are not prorated, and cover labor to repair. This means the manufacturer will pay if the system fails. Manufacturer warranties are available for 10, 15, and 20 years. Even 30 years for certain roofing systems. The two main rubber roof manufacturers in the United States are Firestone and Carlisle. Weathercraft is qualified to work with both.
Polyvinyl Chloride, or PVC, is the original single-ply roof system in the US. PVC roof systems are resistant to grease and chemicals, reduce urban heat index, help under-insulated systems, and are white reflective giving a better Energy Star rating. PVC systems vary dramatically in quality and characteristics, as there are many different formulations and manufacturing methods used when producing PVC roof membranes. Sarnafil, Fibertite, GAF are the biggest PVC manufacturers in the US. Weathercraft is qualified to handle all three.
Built Up Roofs (BUR) use a base layer of insulation or asphalt-soaked base sheet, then alternating of hot asphalt and felts to create multiple plies, then capped off by a flood coat of asphalt, gravel, or modified cap sheet. An aluminum coating can be used to extend the lifespan of the roof. BUR’s need to be well maintained and require periodic roof inspections and repairs. Weathercraft mostly uses Firestone and United Asphalt Systems. Weathercraft uses better products, especially at the walls, to ensure a longer lifespan of roofs.
Modified Asphalt Roofs
Modified Asphalt Roofs consist of thick three-foot-wide sheets of modified bitumen that have been rubberized for increased strength and weatherproof properties. Typically know as Styrene Butadiene Styrene, or SBS for short. These can be used in tandem with BUR systems or as a standalone. SBS sheets are smooth surfaced but granules can be added for extra protection. Weathercraft uses Firestone SBS systems.
Torch Down Modified Roofs
Torch Down Modified Roofs const of thick three-foot-wide sheets of modified bitumen that has been “plasticized” for increased strength and weatherproofing. Typically known as Atactic Polypropylene, or APP, systems. Like SBS, it can also be smooth surfaced or granules can be added for extra protection. APP systems are installed using an open flame torch to heat the asphalt on the back of the sheets. Due to the inherent dangers of using open flames on a roof, APP roof systems are only used in specific situations by crews with regional certification.
Spray-foam systems are two-part spray-applied polyurethane foam, which is put directly to an existing roof or deck. This spray foam is then waterproofed with a coating. These systems are extremely susceptible to any size of hail and high winds, and dirt commonly found in the Midwest. Spray-foam roofs are expensive to remove and will need to be re-coated often, depending on the weather and the original thickness of the coating.
Weathercraft does not install spray foam roofs but is qualified to repair existing roofs if the damage is caught before too much moisture penetrates the system.
Weathercraft does not recommend installing a spray-foam roof in the Midwest.