Fix Sagging Roof Line

If the sagging roof is due to rotting or warping roof decking the repair will be much easier.

Fix sagging roof line.

Next place your piece of plywood and styrofoam foam side up against the damaged roof decking. 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. Unfortunately most roof structural defects don t respond well to homeowner fixes and require professional evaluation and repair. Push up on the plywood until the foam is touching the underside of the roof decking.

It might be a simple fix that can be done by jacking up loose rafters adding struts or more economically by. The easiest way to straighten rafters is to jack them into position. Using a flashlight inspect the rafters and decking in your attic especially in the areas where your roof is sagging. Why is my roof sheathing sagging between the trusses.

Fortunately there are different ways to jack up a sagging roof. If your roof is sagging under the weight of too many shingles ideally all the shingles should be removed and a new set installed. 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. That s how to fix a sagging roof.

Then inspect the metal or plywood gusset plates. However the trick to this process is to do it very slowly so it may take a few weeks before you get the rafter into a position where it is straight again. A sagging roof line may original from the ceiling s horizontal rafters. You will need to remove the shingles and the old decking however which means there will be an exposed hole in the roof.

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. 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. Typically they are lapped and then toe nailed together in its center so that the correct length can be achieved. Look for any kind of damage including rot cracks breaks and more.

Move the jack in increments of one inch to allow for the roof to be able to move with it without cracking. This gives your roofer a chance to inspect the flashing and roof underlayment for damage. To learn more about roofs and attics see these other blog posts.