Roof Sagging Between Rafters

When sagging gets too severe it can lead to roof collapse and once the roof goes the house won t last for long.

Roof sagging between rafters.

If the framing is sound and problems are not found elsewhere but the roof still sags the problem might have originated because of poor installation of the plywood sheathing or shingles. Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. Sagging rafters are a sign that a house is in serious trouble. Sagging sheathing between rafters may be due to rot delamination use of fiberboard or other materials that may not perform well over the life of a home or due use of too thin plywood roof decking to start with.

Fixing a truss or rafter. Here s some examples of how it can happen. Sagging rafters can lead to serious problems with the entire roofing system. There is a section of roof where the rafters appear to be sagging.

Picture the vertical finishing edge that connects to the ends of rafters trusses and the area where the gutter attaches to the roof. If you notice that there is a visible dip in your roof chances are you have a problem with one or several rafters and you may soon be facing more issues like water leaks bowed out walls or your roof caving in on you. Half inch drywall can sag if it s hung under roof trusses that are spaced every 24 in. Prevent this unfortunate series of events by bracing your rafters to make them sturdy and resistant to snow loads and wind.

The fix here is to replace the thin sheathing with thicker sturdier sheathing. Because it was structurally inadequate when installed or has deteriorated over time. Its not just sagging between rafters. Sepecifically its sagging towards the lower 1 3 of the roof.

The ceiling below the sagging portion is a vaulted ceiling. There are no cracks or anything in. The primary function of fascia is to protect by acting as a layer between the edge of the roof and the elements of the outdoors especially water. If the roof sags between the rafters or trusses the most likely cause is sheathing that s too thin for the area it covers.

Drywall instead of 5 8 in. I took a pic but the sagging it not as noticeable in the pic as it is in person. Also inspect the metal or plywood gusset plates used where your wood meets on a truss look for damage that includes cracks rot breaks and any other impairment.