My Roof Sags

A sagging roof is one of the most serious signs of roof failure.

My roof sags.

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. If the roof sags between the rafters or trusses the most likely cause is sheathing that s too thin for the area it covers. A sagging roof can come in one of a few classic forms each with its own cause. 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.

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. Determine where the sag is in your roof in relation to your attic. Straighten out your old house s sagging roof and get rid of those cracks in the wall with these easy to follow steps. Step 1 the first step is to the basement first.

To be safe you will want to have a professional residential roofing contractor or structural engineer take a look. Also inspect the metal or plywood gusset plates used where your wood meets on a truss. Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. The fix here is to replace the thin sheathing with thicker sturdier sheathing.