Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off.
Proper pitch on a covered patio roof.
This is a two percent drop and it is the ideal slope for a patio to effectively drain away from your home.
If you are going to use shingles to cover the patio roof do not forget to install black roofing felt along with a single layer of oriented strand board.
Determine the minimum slope of the roof based on the roofing material.
The minimum pitch for shingles is 1 6 which is equivalent to 4.
Slope of a patio cover can also be adjusted for a larger slope if you are following your roofline for example.
This allows for your patio cover to have proper drainage.
Buddy of mine had a stone patio put in last friday and the contractor pitched the patio 1 2 3 4 per foot.
When they are installed you can begin attaching roofing shingles.
When all the rafters are installed correctly form your patio roof by attaching the planks horizontally across the rafters.
Do not go for a steeper pitch because the form of the covered porch will overpower or contrast with the main roof.
This means that the side furthest from your house will be five inches lower than your house.
If you are considering installing a patio cover or aluminum awning you will want to have a minimum of slope per foot projection.
For example if the patio is 20 feet in length the slope should be five inches.
If it is not possible to match the existing roof choose a pitch that is shallower.
Importance of a roof pitch.
The chief reason for having a roof pitch is to redirect water and snow away from the roof and avoid any percolation that might result from stagnation of water on the roof.
The irc recommends a minimum design load of 10 pounds per square foot in addition to all dead loads except where this minimum is exceeded by local snow or wind load requirements.
Match the roofing on the covered porch with the main roof.
How roof pitch determines suitable roofing systems.
He s not happy with the slope and asked what the norm was.
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Residential roofing with different pitches does not appear cohesive.
The pitch of the covered porch roof should match that of the main roof.