Rise and run for your porch roof your roof s slope also called pitch is determined by the rise and run.
Back porch roof pitch.
Its design is shallow to compliment the design of a house.
Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12.
After that cut the rafters back to the wall line.
The slope is the steepness of your roof and is the ratio between any two points on your roof.
On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.
By matching the pitch of the gables we were still consistent with the roof.
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Blind valleys simplify framing.
Your porch roof pitch should maintain the same pitch also known as rise and run as the other roof lines on your home or as a minimum the pitch of the roof directly above the porch roof.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
The detached porch below has a metal hip roof.
While the home s primary roof is a more steeply pitched hip roof the porch roof does not need to be the same pitch.
You ll need a level that is 12 or longer and a tape measure.
By doing this method you will have a clean finish that is connected to the wall line.
The back channel is connected to the rafter directly and reinforced.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
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A 7 12 roof normally expressed as a ratio means that for every 12 inches horizontally the run your roof rises 7 inches.
It is a roof with a sloping surface attached to the upper end of the house wall.
After a taking some measurements and doing a bit of ciphering we established that the steepest pitch we could use on the porch roof was 4 in 12.
On this home the roof pitch is the same as that of the gables on the dormers.
You can raise the patio roof up to 500 millimeters by removing the eaves fascia and gutter.
If the area of the porch is too deep the house roof line will look somewhat high and out of place.