Roof Sags In Middle

Non foundational reasons for a sagging roof.

Roof sags in middle.

A sagging roof can come in one of a few classic forms each with its own cause. Use your string line to determine how much the roof need to go up. The home may not be designed to support the weight of this extra roofing material and it will sag. If your rafters are still sagging a bit and it is causing your roof to dish out a little in the center of the roof sides add a 2x4 that goes all the way across the rafters in the center of the length of the rafters.

A ridge that droops in the middle forming that unintentional western design feature likely is due to undersized rafters and or missing or inadequate internal bracing rafter or collar ties. Decay can occur over time due to a number of reasons including leaks in the roof or leaks from guttering or downpipes wet rot or even insect attacks such as termites damaging the ends of the bearings. 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. This is the easiest problem to repair.

Additionally if your roofer has used material that is much heavier than your previous roof it can sag for the same reason. Rotten or saturated sheathing can also cause roof lines to sag. If the framing is sound and problems are not found elsewhere but the roof still sags the.