Sagging Roof Ridge Repair

Took about two weeks to very slowly encourage everything to move back into place.

Sagging roof ridge repair.

The first step is to find out how many rafters are sagging and if anything else is damaged. The roof took it all in stride just fine. Once you have established how much the roof sag needs to be jacked up lay a 2x4 plate across the ceiling joists and nail directly under the ridge of the roof. Place the plywood and styrofoam side up against the damaged roof decking.

Bolstering the beams of your roof is another solution to repairing a sagging roof however it is often something that requires assistance from another able bodied person since beams can be extremely heavy. Push up on the plywood until the foam is touching the roof decking s underside. The operative words here are gently and slowly. Fixing a gusset plate.

If your roof is sagging wavy or bowing there are six important things in the attic to check from a structural standpoint. If these already exist nail a 2x4 to them directly under the 2x4 plate you nailed down before. To permit mounting of the roof sag expander first bolt holes are drilled in corresponding positions near mid span for each pair of sagged rafters that are to be pushed apart and back to a more nearly straight position. This may have been caused by any number of factors.

You may find that several are in need of straightening and that some of the sheathing must be replaced. If necessary jack up any sagging at the ridge. In a stick frame non truss sloped roof these issues usually cause the roof ridge to sag in the middle giving it a swayback look but can also cause one side of the roof to sag. I pulled my own garage ridge back up to level with screw jacks on the ridge board and turnbuckled cables from opposing rafter ends.

However it is important to fix the rafters before doing any other work to the roof. Roofs may sag because a ridge beam or ridge board is cracked or damaged. Now add collar ties from one side of the rafter to the other. Keep the plywood in place using a piece of lumbar strapping until you can get a roofing expert to repair it.

Fixing a sagging roof by bolstering the beams.