Low Slope
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Understanding Products and Systems
Low-slope roofing products come together to form a low-slope roofing system.
CertainTeed offers over forty roll good products, which equate to hundreds of system configurations and specification options. In an effort to simplify system selection, this Low-Slope Selection Guide highlights our recommended systems by application, their value, and the individual product benefits.
Low-slope roofing products come together to form a low-slope roofing system.
CertainTeed offers over forty roll good products, which equate to hundreds of system configurations and specification options. In an effort to simplify system selection, this Low-Slope Selection Guide highlights our recommended systems by application, their value, and the individual product benefits.
Material
CertainTeed offers non-modified and polymer-modified bituminous (asphalt-based) roll goods. Non-modified asphalt products are categorized as built-up roofing (BUR ).
These products are permeable so that hot asphalt can flow through the product as layers are “built up” on the roof, resulting in a relatively thick, watertight roof system. APP-modified products are manufactured with atactic polypropylene infused asphalt which increases material strength and toughness, especially in high UV areas. SBS-modified products are manufactured with styrene-butadiene-styrene infused asphalt which increases flexibility, especially in low temperatures. Roof systems may consist of one or multiple materials depending on the desired performance, warranty, and cost.
Reinforcement
Reinforcement mats serve as the structure to bituminous low-slope roll goods. They are impregnated and coated with non-modified or modified asphalt. CertainTeed offers low-slope products with either fiberglass mat or polyester mat at varying thicknesses.
Fiberglass
stands up well to heat and tension. Its inherently high melting point affords superior fire resistance when combined with a fire-retardant asphalt formulation. Fiberglass-reinforced products applied in hot asphalt retain excellent dimensional stability. Additionally, fiberglass has superior tensile strength. When combined with SBS-modified asphalt, the sheets will resist roof movement until the stress absorbed in the mat forces a break.
Polyester’s
predominant benefits are puncture resistance and high elongation. Polyester products handle rooftop foot traffic better. They can also cyclically absorb the strain of building movement and return back to their original dimension.
CertainTeed offers non-modified and polymer-modified bituminous (asphalt-based) roll goods. Non-modified asphalt products are categorized as built-up roofing (BUR ).
These products are permeable so that hot asphalt can flow through the product as layers are “built up” on the roof, resulting in a relatively thick, watertight roof system. APP-modified products are manufactured with atactic polypropylene infused asphalt which increases material strength and toughness, especially in high UV areas. SBS-modified products are manufactured with styrene-butadiene-styrene infused asphalt which increases flexibility, especially in low temperatures. Roof systems may consist of one or multiple materials depending on the desired performance, warranty, and cost.
Reinforcement
Reinforcement mats serve as the structure to bituminous low-slope roll goods. They are impregnated and coated with non-modified or modified asphalt. CertainTeed offers low-slope products with either fiberglass mat or polyester mat at varying thicknesses.
Fiberglass
stands up well to heat and tension. Its inherently high melting point affords superior fire resistance when combined with a fire-retardant asphalt formulation. Fiberglass-reinforced products applied in hot asphalt retain excellent dimensional stability. Additionally, fiberglass has superior tensile strength. When combined with SBS-modified asphalt, the sheets will resist roof movement until the stress absorbed in the mat forces a break.
Polyester’s
predominant benefits are puncture resistance and high elongation. Polyester products handle rooftop foot traffic better. They can also cyclically absorb the strain of building movement and return back to their original dimension.