However you can only use this pitch with built up roofing or specialized synthetic roofing.
Build pitched roof over porch.
By doing this method you will have a clean finish that is connected to the wall line.
Using two inch by four inch studs build a frame for columns that stand from the porch floor to the soon to be built roof.
Rainwater management by building a pitched gable roof the amount of water being shed on top of anyone entering the house was reduced.
Because the rainwater is diverted out to the sides of the porch there was no need for the extra complication and expense of rainwater guttering.
Draw the plan of you porch roof and make calculations.
When building a porch roof asphalt shingles or other roofing material are then attached over the roofing paper and drip edge.
Once completed roofing paper will be installed.
Calculate rise and run it is quite a simple task if you use the special online calculator to determine pitch roof slope and cut the rafter to the proper length.
If you have a square porch you need support columns at the two corners farthest from the house.
Then attach drip edge over the roofing paper.
A new coat of shingles over decaying shingles will cause your roof deck to decay.
Accurate and detailed plan and is crucial to building a durable and good looking porch roof.
Sheathing 1 2 inch plywood or osb is nailed to the rafters.
Brace the column frame in place using l brackets and concrete screws.
The solution is changing the roof pitch or building a new roof at a higher pitch than the old roof.
The back channel is connected to the rafter directly and reinforced.
You must not build the new roof directly over the old.
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The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.