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Remommn eneded for low pitched roof.
Minimum slope for low slope roof systems with any roofing material a slope of at least 1 4 inch per foot is recommended to promote drainage and minimize ponding.
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This in turn results in a longer life span and a very low annual.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
In combination with iko roof fast cap sheets it provides waterproofing properties and durability for low slope roofs.
Moreover low slope metal roofs are not prone to the degradation experienced by organic materials enabling these roofs to better resist the elements.
But the taller profiles like standing seam and pbr shown below can be installed on roofs with as low as 1 4 or 1 2 in 12 pitch.
The lower pitch of the roof means greater walkability.
In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.
Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak.
The membrane will outlast the shingles and seal around all nail penetrations.
May you like low pitch roof house plans.
For the smaller residential low slope roofing applications such as garage and porch transitions certainteed offers an excellent solution in our flintlastic sa self adhering sbs modified bitumen roofing system.
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4 12 to 20 12 pitches.
For pitches of 2 5 12 up to 4 12 the roof requires double underlayment.
Low pitch roofs are safer and easier to access when maintenance and or repairs are needed.
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For a low slope residential roof there are two main options.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Pros since a low pitch roof doesn t require as many shingles more often than not a low pitch roof will end up being more cost efficient during installation.
Where deflection from snow or other live loads is a concern a greater slope will be needed to prevent any ponding.
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Clay or cement tiles can be used on a wide range of roof pitches.
1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.
Then apply standard asphalt shingles over the membrane.