My Roof Sags

Also inspect the metal or plywood gusset plates used where your wood meets on a truss.

My roof sags.

From there you ll be able to decide the best next step. Step 1 the first step is to the basement first. Determine where the sag is in your roof in relation to your attic. A sagging roof is one of the most serious signs of roof failure.

The fix here is to replace the thin sheathing with thicker sturdier sheathing. The expert should be able to inspect your roof and explain to you what the problem is. Since roofs are designed to be straight a curved or sagging roof means that its structural integrity is insufficient and it may be a warning sign that your roof is headed for collapse. To be safe you will want to have a professional residential roofing contractor or structural engineer take a look.

Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. A ridge that droops in the middle forming that unintentional western design feature likely is due to undersized rafters and or missing or inadequate internal bracing rafter or collar ties. 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. If the roof sags between the rafters or trusses the most likely cause is sheathing that s too thin for the area it covers.