That s how to fix a sagging roof.
How to take the sag out of a roof.
The first step is to find out how many rafters are sagging and if anything else is damaged.
It may be necessary to tear up shingles to fix a sagging roof.
You should obtain a piece that measures 1 2 with sides that measure 4 in length and an overall length of the entire piece being a minimum of 2 feet.
Determine the extent of damage.
Next place your piece of plywood and styrofoam foam side up against the damaged roof decking.
Use instructions from my page how to fix a sagging floor before you continue trying to fix the roof sagging issue.
Push up on the plywood until the foam is touching the underside of the roof decking.
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How to straighten sagging roof rafters.
You may find that.
Drill holes in angle iron.
The first step is to the basement first.
Check the ceiling for sagging by attaching a string on one end of the beam and run it along the bottom edge of the beam.
It is best to do all repairs from the top of the roof which means you will have to tear up shingles and other coverings as well as the roof decking in some cases.
After that use a piece of lumbar strapping to keep the plywood in place until you can get a roofing repair expert to fix it.