Roof Sagging Between Rafters

When considering what to do about sags in a roof start by noticing if the sag is in sheathing between rafters page top photo0 or sagging along the length of the rafters.

Roof sagging between rafters.

This article describes a diy repair project using a site built spreader to straighten sagged roof rafters and decking. Drywall instead of 5 8 in. Sagging roof lines can originate with the horizontal ceiling rafters. Half inch drywall can sag if it s hung under roof trusses that are spaced every 24 in.

Some problems relating to a sagging roof line should definitely be evaluated by a professional in the roofing industry. When sagging gets too severe it can lead to roof collapse and once the roof goes the house won t last for long. If so i bet the installers used 1 2 in. 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.

When rain water comes through your roof s shingles the plywood will wrap rot or weaken and this will make the roof look like it is sagging between its rafters. Before fixing the problem however it is important to identify the exact cause of the problem. Prevent this unfortunate series of events by bracing your rafters to make them sturdy and resistant to snow loads and wind. Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging.

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. Problems with the roof itself aren t the only reason a roof might sag. On average a roof lasts between 15 to 30 years depending on the design the materials used and your climate.

If your ceiling drywall is sagging between joists sometimes called pillowing it s probably on the top floor and attached to the roof trusses. If your roof is more than 30 years old rebuilding it will be the most effective approach to dealing with sagging. Sagging rafters are a sign that a house is in serious trouble. Sagging rafters can lead to serious problems with the entire roofing system.