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.
How to fix a sagging garage roof.
Rotten or saturated sheathing can also cause roof lines to sag.
If the sagging roof is due to rotting or warping roof decking the repair will be much easier.
How to fix a sagging garage roof step by step guide written by kellan jansen.
Push up on the plywood until the foam is touching the underside of the roof decking.
Even if you don t park your cars in one a garage still provides you with extra space for storage tools and other items you don t want to keep indoors.
Try to rope in a friend or two as the beams can be heavy and try to plan your renovation project for a sunny weekend.
This may be problematic in winter months but allowing the roof to continue to sag can lead to greater problems such as a cave in.
You will need to remove the shingles and the old decking however which means there will be an exposed hole in the roof.
You can therefore easily identify whether your roof is sagging if you can see a swag curve or dip at its peak when you stand on the street.
A sagging garage roof repair isn t an overwhelming task but it is best to get the job done before it becomes a major roof replacement.
This is the easiest problem to repair.
Garages are an excellent addition to any home.
Next place your piece of plywood and styrofoam foam side up against the damaged roof decking.
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.
In some cases roof sagging problems are not caused by framing issues.
That s how to fix a sagging roof.