If necessary use something to force the roof up while you work the beams into place and fasten them.
Fix sagging roof garage.
In some cases roof sagging problems are not caused by framing issues.
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.
Push up on the plywood until the foam is touching the underside of the roof decking.
Gradually work along all the beams pushing the roof up as you go.
Safeway carpentry and doors has a great deal of experience in repairing and replacing garage roofs garage siding garage door openers garage doors and the concrete in and around a garage.
The first step is to the basement first.
If the line does not continually follow the bottom of the beam and the bottom of the beam is below the line the beam is sagging.
Next place your piece of plywood and styrofoam foam side up against the damaged roof decking.
A sagging garage roof a leaning garage or a garage in need of straightening can lead to other problems.
Any sagging will gradually be lifted and by the time you have finished the garage roof repair your roof should but upright again.
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.
Attach it to the beam with carriage bolts but do not tighten completely.
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.
Step 4 strengthen the beams.
It may be necessary to tear up shingles to fix a sagging roof.
That s how to fix a sagging roof.
This is the easiest problem to repair.