Roof Rafer Construction Wall Sag

Rafters are nailed to the plate.

Roof rafer construction wall sag.

The tops of inclined rafters are fastened to the ridge or another rafter depending on the type of roof. This article describes a diy repair project using a site built spreader to straighten sagged roof rafters and decking. Rafters rest on the top wall plate. 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.

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. Check for damage to rafter ties as well as their connection to the exterior walls. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. 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.

Remedies for a sagging roof there are a number of remedies for traditional rafter style roof frames depending on the problem and its severity. Sagging rafters can lead to serious problems with the entire roofing system. Rafters rafters make up the main framework of all roofs. 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.

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. Some roof framing designs include the use of a strut or beam that runs perpendicular across the bottom of the rafters inside the attic. Normally in the bottom third area of the rafters or sitting on the exterior wall top plate.

The beam is attached to both exterior walls and to the. It is always better to have a large rafter rather than be concerned with a sagging roof. 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. 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.

They are inclined members spaced from 16 to 48 inches apart.