Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak.
Remommn eneded for low pitched roof.
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The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
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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Where deflection from snow or other live loads is a concern a greater slope will be needed to prevent any ponding.
1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.
Low pitch roofs are safer and easier to access when maintenance and or repairs are needed.
Iko roof fast base ma is a fiberglass reinforced nailable base with a special film surface designed to be used as one of iko s roof fast low slope roofing components.
The lower pitch of the roof means greater walkability.
Flintlastic sa products feature easy and clean application and also have granulated surfaces with colors that coordinate with certainteed shingles providing the homeowner with a complete and coordinated solution for roof designs that transition from steep to low slope.
In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.
Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.
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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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.
Moreover low slope metal roofs are not prone to the degradation experienced by organic materials enabling these roofs to better resist the elements.
The membrane will outlast the shingles and seal around all nail penetrations.
4 12 to 20 12 pitches.
For pitches of 2 5 12 up to 4 12 the roof requires double underlayment.
This in turn results in a longer life span and a very low annual.
In combination with iko roof fast cap sheets it provides waterproofing properties and durability for low slope roofs.
For a low slope residential roof there are two main options.
Then apply standard asphalt shingles over the membrane.
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Asphalt shingles continue to be the most widely installed roof covering option in north america.
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