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Flat And Low Slope Roof Systems

Roof Cost CalculatorThe generally accepted industry standard for flat roofs is a structure with enough pitch (slope) to adequately drain water from the structure. In the past this was 1/4" per foot. Due to problems with the building structure setteling and creating "ponding areas" the current industry standard is 1/2" per foot.  A low slope roof is defined as a structure with a roof slope no greater than 2-1/2 in per foor slope. All the roof systems descriped below can be applied to eather of these structures.

Single Ply Roofing Systems: Single Ply roof systems are most often installed on larger commercial projects. There are many different product types but the most common ones are PVC, TPO & EPDM. They can be decanally attached, fully adhered or ballested. Their ease of installation and low cost of repairs/maintenance make them the choice of most commercial architects.

Builtup Roofing Systems: A low slope roof system used in both Residential and Commercial Construction. It typically consists of a fiberglass base sheet followed by layers of fiberglass ply sheet adhered with hot asphalt or cold applied adhesives. The top surface can be a granular surfaced cap sheet or roofing gravel embedded in hot asphalt. A very dependable, and affordable, roof system when properly maintained.

Modified Roofing Membranes: Similar to the Builtup Roof System, however, the fiberglass ply sheets and cap sheet are replaced with a single layer of Modified Bituman Roofing Membrane typically reinforced with Polyester or Fiberglass. This membrane comes in several different types and can be applied with hot asphalt (SBS), heat applied (APP) or self adhering (SA). This roof system is most often used when dealing with smaller roof decks or where access to the roof areas is limited.

Foam Roofing Systems: Spray Polyurethane Foam (SPF) is a low slope roof system used in both Residential and Commercial Construction. It typically consists of closed cell sprayed polyurethane foam and a top protective layer of elastomeric coating. This system is effective on roof decks with poor drainage. Drawbacks to a foam roof are that they require periodic recoating and are susceptible to impact damage from hail.

 

Duro-Last Approved Applicator

BBBLogoDLTransparentResidential • Commercial • Industrial • Hospitality • Retail • Restaurants

Concrete & Clay Tile • Asphalt Shingles • Wood Shakes & Shingles • Builtup Roofing

Single Ply Roofing • Modified Roof Systems • Standing Seam Metal Roofing

Fascia & Soffit Systems • Roof & Deck Coatings

 

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