Flat and Low Slope Roofing

Here are some galleries of our completed jobs for flat roofs.

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EDPM

Ethylene Propylene Diene Monomer (or Terpolymer which is simply a product consisting of three distinct monomers). EPDM is classified as a Thermoset material which means it is either fully-cured prior to being installed or that it cures during natural weathering after installation. Most systems we install are fully-cured prior to instillation. EPDM roofs are single-ply membranes meaning there is only one ply of roofing material, not multiple plies laminated together.

EPDM has been in use on roofs in the USA since the 1960's and is one of the most common types of low-slope roofing materials. This is because it is relatively inexpensive, simple to install, and fairly clean to work with when compared to conventional built-up roofs. There is no risk of fire to the building or dwelling during the application; which may occur with the torch down modified system.

EPDM is a rubber material whose principal components consist of the compounds ethylene and propylene. A flexible rubber matrix forms when a small amount of diene is added to the mix. EPDM is available reinforced or unreinforced with both commonly used; it's also available in either a cured (vulcanized) or uncured (non-vulcanized) state. Vulcanized EPDM is the most common with non-vulcanized often used for flashing purposes.

EPDM membrane thickness ranges from thirty mils (0.030") to one-hundred mils (0.100") with the most common thicknesses being sixty mils (0.060"). There are three standard application procedures: (1) fully-adhered; (2) mechanically-fastened; (3) loose-laid. Fully-adhered EPDM uses solvent-based adhesives to adhere the rubber to the substrate. Mechanically-fastened EPDM is attached by manufacturer-approved mechanical means with Olympic screws which are usually accompanied by plates to hold the insulation in place. to the substrate, and loose-laid membranes are secured only at the perimeters and any penetrations. We use the 2001 System for most of our loose laid jobs. We also use a ballast of round river rock spread out evenly over the entire roof with a gravel stop flashing detail around all perimeters to prevent rock from sliding off the roof edges due to excessive water flow. River rock is usually installed at a rate of 1000 - 1200 pounds per square (100 square feet) Structural integrity is important with loose-laid roof systems. The seams of all systems are then sealed using either an adhesive or a splice tape. Splice tapes have tested with a higher tear-strength.