Fix Sagging Roof Truss

Sagging rafters can lead to serious problems with the entire roofing system.

Fix sagging roof truss.

You ll need a steel l channel to get your rafter or truss back into shape. However if it is a small area it can be caused by damaged roof decking and in some rare cases a sagging roof can even be traced to an underlying foundation problem as it is the house foundation that eventually takes the full load of the roof. Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your roof is sagging. 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.

How to repair a sagging roof part 1. How to fix sagging roof trusses or rafters. A sagging roof as shown in figure 1a is usually the result of a damaged or broken roof rafter. Should the bottom cord of one or more trusses be sagging or damaged it may be reflected in a sagging ceiling or if the roof is over loaded to heavy then the downward pressure may cause the sagging.

Your truss sizes may vary. Step 1 cut two 2 by 4s or 2 by 6s to serve as truss patches. Sagging ceiling could be an indication of framing issues some of which could be related to the roof. Fixing a sagging roof as soon as you spot it is very important otherwise you could find that the problem will only worsen over time and in the end you may need to have the entire roof replaced which could be extremely costly not to mention a lot of hassle.

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. If you have just stepped outside your house and realized that your roof is no longer straight this could signal a problem. However most trusses are either 4 or 6 inches. You can expect to repair sagging trusses in two to four hours depending on the size and scope of the project.

Fixing a truss or rafter. At the chimney the homeowner designed an inverted truss to straighten the sagged rafters. One will be placed on either of the flat sides of the truss. With the inverted hinged truss in place a vertical wedge can be used to bend the sagged rafter upwards.