Roof Rafer Construction Wall Sag

Without the proper support of rafter ties or a structural ridge a typical gable or sloped roof will sag downwards while pushing the building walls outwards towards a catastrophe.

Roof rafer construction wall sag.

It is always better to have a large rafter rather than be concerned with a sagging roof. The beam is attached to both exterior walls and to the. Check for damage to rafter ties as well as their connection to the exterior walls. This article describes a diy repair project using a site built spreader to straighten sagged roof rafters and decking.

Roof rafter decking sagging. 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. Rafters rafters make up the main framework of all roofs. The tops of inclined rafters are fastened to the ridge or another rafter depending on the type of roof.

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. Rafter ties rafter ties on gable type roofs are usually horizontal wood pieces often 2 4 s or 2 6 s that help keep the exterior wall tops from spreading outwardly. Sagging rafters can lead to serious problems with the entire roofing system. They vary in size depending on length and spacing.

Installing new rafters directly alongside the weak or damaged ones is often enough to correct this problem. Normally in the bottom third area of the rafters or sitting on the exterior wall top plate. Some roofs sag because of decay to the inside beams and sheathing. Often the framing can be bolstered and beefed up internally but if the roofing material needs replacement anyway it may be best to tear off the old sheathing and install larger rafters while the roof.

Remedies for a sagging roof there are a number of remedies for traditional rafter style roof frames depending on the problem and its severity. They are inclined members spaced from 16 to 48 inches apart. Some roof framing designs include the use of a strut or beam that runs perpendicular across the bottom of the rafters inside the attic. Rafters are nailed to the plate.

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.