My 2 x 4 rafters are 24" on center. They support 3 layers of shingles, a layer of cedar and a layer of pine sheathing - that's a lot of weight. So much so that it has cracked
several of the rafters.
After consulting buddies of mine that each have twenty plus years of roofing experience I am going to follow these directions;
First replace floor joists from
end to end (the entire span in all structural framing is key) Use nail gun and circular for this
Step 2 lay a 2x6 plate across and above the entire span of my attic floor / downstairs ceiling joists
Step 3 climb step ladder, use speed square to measure pitch of roof, set chop saw and cut base plate side of 2x6 sister rafter
Step 4 Have a friend hold base plate flush to floor (I don't need a seat cut - you might)
Grab other end of sixteen foot 2x6 climb step ladder use square to draw a line down from my 1x8 pine ridge plate, cut 2 x6 - lay sister rafter on the ground then
Step 5 use a four foot level against cracked rafter and good rafter to inspect the difference in pitch (get a mental picture of how the good rafter looks)
Step 6 jam a kneewall sized 2x6 between new base plate (step 2) and cracked rafter to take the sagg out of the roof (check pitch with level)
Step 7 from
end to end nail up the sister rafter that I just cut both sides of with the nail gun my buddy lent me.
Step 8 remove kneewall from new 2x6 rafters and put them under good 2x4's
Peace out y'all
Slummy
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