This was confirmed in a 2005 study of low slope roofing conducted by ducker international.
Low pitch epdm roof details.
1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.
Many details call for an 8 to 12 inch vertical but this just isn t sufficient.
If the upper edge of a low slope shed roof intersects a vertical wall the most logical approach in my opinion is to detail the roof as an unvented roof.
Fleece backed epdm has been used as a separator when the substrate consists of an old bituminous roof containing soft bitumen e g.
Regular asphalt shingles and standard skylights will work at pitches of 4 12 or greater but at lower pitches you have to use different materials.
The conservation technology epdm roofing system offers any homeowner builder or roofer the means to reliably and permanently waterproof low slope roofs rooftop decks and green roofs.
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Another approach is to build a cupola or ventilated doghouse in the middle of the low slope roof an approach championed by joe lstiburek.
Firestone has developed cad drawings of its epdm installation details to assist roofing professionals with the specification of firestone epdm roofing systems.
By low slope roofing we mean any roof that is pitched at less than 4 inches of rise in 12 inches of run or 4 12 pitch.
There are over 150 variations of details available from carlisle syntec for epdm roofing systems.
Installation is important when it comes to putting a single ply roofing system on a building.
The membrane will outlast the shingles and seal around all nail penetrations.
Unlike other traditional roofing materials the rubber membrane is incredibly versatile and easy to install on a wide range of surfaces and angles.
In most cases we custom fabricate a single sheet the size of each roof eliminating the risks associated with field seaming.
Coal tar pitch type i asphalt asphalt mastic or a resaturant.
The detail drawings are grouped by detail type and can be downloaded below in dwg or pdf format.
Then apply standard asphalt shingles over the membrane.
Ballasted systems are limited to a maximum slope of 2 inches per foot 2 percent.
Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs.
Respondents to the study said they expected the life cycle cost of a metal roof including outlays for maintenance to be about 30 cents a square foot per year far less than their expectations for built up and single ply roofs at 37 cents and 57 cents.
People don t like the look of the exposed membrane so there is always a temptation to shingle over the lower roof membrane.
That includes soldered metal roofing or synthetic membranes.
In many instances the lower roof is deep enough that the exposed roofing isn t visible from the ground.
