How do I compute the roof pitch for a 45 degree angle?



Answers:
12/12

Other answers:
I am not sure I understand your question but here is how the pitch is described. A 4/12 pitch roof falls 4" in 12"
a 12/12 is probably closet to your 45 degree as it will fall 12"in 12".

Hope this helps.
I am not sure I understand your question but here is how the pitch is described. A 4/12 pitch roof falls 4" in 12"
a 12/12 is probably closet to your 45 degree as it will fall 12"in 12".

Hope this helps.
A 6/12 roof is only 22.5 degrees.

A 45-degree pitched roof will drop 12 inches ("rise" for every 12 inches of length ("run") or 12 over 12.

To compute this:
You know you have a right angle, because structures are generally built straight up from the ground (90 degrees in relation to the ground). So you know your triangle has a 90, 45, & 45 degree angles, making the old C(2) = A(2) + B(2) formula work great. [(2) means squared]
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