Roof Sagging Between Rafters

Sagging rafters are a sign that a house is in serious trouble.

Roof sagging between rafters.

Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. Prevent this unfortunate series of events by bracing your rafters to make them sturdy and resistant to snow loads and wind. If the roof sags between the rafters or trusses the most likely cause is sheathing that s too thin for the area it covers. Drill four 3 8 holes in the base of the steel angle stock and four holes in the side.

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. Roof sheathing sags for the same reason any component of a home that spans between two bearing points sags. Fixing a truss or rafter. When sagging gets too severe it can lead to roof collapse and once the roof goes the house won t last for long.

Place the side holes about 1. The fix here is to replace the thin sheathing with thicker sturdier sheathing. Here s some examples of how it can happen. Roof sagging in between trusses 1.

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. 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. Sagging rafters can lead to serious problems with the entire roofing system. Using 3 8 x 2 lag.