Roof Sagging Between Rafters

Because it was structurally inadequate when installed or has deteriorated over time.

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. Remove any broken splinters of wood that may prevent the rafter or truss member from re aligning itself. Place the side holes about 1. Roof sagging in between trusses 1.

Here s some examples of how it can happen. 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. 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.

If the roof sags between the rafters or trusses the most likely cause is sheathing that s too thin for the area it covers. Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. 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. The fix here is to replace the thin sheathing with thicker sturdier sheathing.

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. Roof sheathing sags for the same reason any component of a home that spans between two bearing points sags. Using 3 8 x 2 lag.