Roof Sagging Near Chimney

Fixing a truss or rafter.

Roof sagging near chimney.

Common flaws include undersized rafters insufficient sheathing or too few rafter or collar ties. Some roof framing designs include the use of a strut or beam that runs perpendicular across the bottom of the rafters inside the attic. Sagging ceiling could be an indication of framing issues some of which could be related to the roof. Because where the chimney comes through there is going to be some framing that takes the flooring around that and that s probably the reason that the floor is sinking in the area of the chimney and walls that are resting on that floor would move accordingly.

Keep your attic well insulated and ventilated to prevent ice dams which can cause roof leaks. To determine what is causing your chimney to lean take a look at the angle. 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. A chimney that is leaning away from a house or appears to be falling onto a yard indicates foundation issues.

Sagging rafters may be the result of having framed the roof with lumber of dimensions smaller than current building standards such as using 2x4s or 2x6 s or there may be damage to the framing from insects or rot. Sagging sheathing between rafters may be due to rot delamination use of fiberboard or other materials that may not perform well over the life of a home or due use of too thin plywood roof decking to start with. Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. The beam is attached to both exterior walls and to the.

A chimney that appears to be falling onto a house or roof indicates that serious structural problems exist.