The top of a chimney pipe must extend at least 2 feet above the peak of the roof if the pipe is within 10 feet of the peak.
Peek roof line.
If the pipe is farther than 10 feet from the roof.
Pitch is the slope or angle from the wall plate to the roof ridge line.
If your rafters are still sagging a bit and it is causing your roof to dish out a little in the center of the roof sides add a 2x4 that goes all the way across the rafters in the center of the length of the rafters.
Usually made from 1 2 inch plywood the decking closes and reinforces the roof structure and provides a nailbed for the shingles.
Pitch for a gable roof the most common is generally 1 4 or 1 3.
Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang.
You roof line is now straight and your floors are as well.
Pitch can vary a great deal from a shallow slope up to a very steep pitch.
Use your string line to determine how much the roof need to go up.
Gabriel poole s gartner house uses a sweep of custom orb to form the roof line and a wall of glass faces the dramatic view.