Fix Sagging Roof Line

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.

Fix sagging roof line.

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. Using a flashlight inspect the rafters and decking in your attic especially in the areas where your roof is sagging. The first step is to the basement first. This gives your roofer a chance to inspect the flashing and roof underlayment for damage.

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. That s how to fix a sagging roof. When the framing of the roof is put together quite frequently two of the ceiling rafters will be fixed together as this will create a much longer span. Move the jack in increments of one inch to allow for the roof to be able to move with it without cracking.

Then inspect the metal or plywood gusset plates. Fortunately there are different ways to jack up a sagging roof. It might be a simple fix that can be done by jacking up loose rafters adding struts or more economically by. Push up on the plywood until the foam is touching the underside of the roof decking.

If the sagging roof is due to rotting or warping roof decking the repair will be much easier. 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. You will need to remove the shingles and the old decking however which means there will be an exposed hole in the roof. Unfortunately most roof structural defects don t respond well to homeowner fixes and require professional evaluation and repair.

The easiest way to straighten rafters is to jack them into position. Problems with and repairs to a sagging roof should be evaluated by professionals. A sagging roof line may original from the ceiling s horizontal rafters. 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.

Why is my roof sheathing sagging between the trusses. To learn more about roofs and attics see these other blog posts. Look for any kind of damage including rot cracks breaks and more.