For a low slope residential roof there are two main options.
Low pitch epdm roof details.
The membrane will outlast the shingles and seal around all nail penetrations.
In many instances the lower roof is deep enough that the exposed roofing isn t visible from the ground.
Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs.
Another approach is to build a cupola or ventilated doghouse in the middle of the low slope roof an approach championed by joe lstiburek.
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.
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.
Low pitch roof construction repair and replacement with a classicbond epdm rubber roofing membrane an epdm rubber roof can be used for low pitched roofs.
Unlike other traditional roofing materials the rubber membrane is incredibly versatile and easy to install on a wide range of surfaces and angles.
Installation is important when it comes to putting a single ply roofing system on a building.
Coal tar pitch type i asphalt asphalt mastic or a resaturant.
Videos have been put together for many of these details and can be found below.
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.
Then apply standard asphalt shingles over the membrane.
Many details call for an 8 to 12 inch vertical but this just isn t sufficient.
There are over 150 variations of details available from carlisle syntec for epdm roofing systems.
That includes soldered metal roofing or synthetic membranes.
In most cases we custom fabricate a single sheet the size of each roof eliminating the risks associated with field seaming.
This was confirmed in a 2005 study of low slope roofing conducted by ducker international.
People don t like the look of the exposed membrane so there is always a temptation to shingle over the lower roof membrane.
Hold your cursor over the file name to view when a drawing was last updated.
Firestone has developed cad drawings of its epdm installation details to assist roofing professionals with the specification of firestone epdm roofing systems.
Fleece backed epdm has been used as a separator when the substrate consists of an old bituminous roof containing soft bitumen e g.
The detail drawings are grouped by detail type and can be downloaded below in dwg or pdf format.
Ballasted systems are limited to a maximum slope of 2 inches per foot 2 percent.
