Fixing Uneven Roof Trusses

Localized damage to one or two trusses will typically not result in structural failure of the roof system but could cause the roof or ceiling to sag.

Fixing uneven roof trusses.

When a truss becomes damaged cut or modified there is a chance of a structural overload or that they will not perform properly. Obviously this is not a good situation as it can cause the entire roof to fail if not addressed. I drew in a truss on the left going from the roof edge to over the bearing interior wall. Set the angle of the circular saw blade to match the slope of your roof and run the saw along the top edge of each fascia board.

Then i drew another truss starting at the end of the first truss and going to the edge of the roof on the right. The ho did the walls because that s easy didn t square up the walls and now expects the roof framer to fix it. The top photo above shows trusses being improperly stored on uneven ground. Now i can see the wall in roof mode and i know where to make the break in the truss.

Trusses come in different lumber widths 2 by 6 or 2 by 8. The bottom image illustrates proper horizontal storage with blocking placed at a suffficient height beneath the stack of trusses to minimize lateral bending and to lessen moisture gain from the ground. Rip the tops of the fascia boards to match the slope of your roof. These trusses are usually engineered by a structural engineering company to carry a specific roof load.

You can do this by measuring across the width of the truss. When damaged or altered this can effect structural integrity of th e roof system. The important aspects of this repair is the length of the split as you will need to adequately cover it. With the inverted hinged truss in place a vertical wedge can be used to bend the sagged rafter upwards.

Roof sag sagging roof rafter repair site built rafter spreader mid span rafter ties smooth wavy roof. A 2 by 6 truss will measure 5 5 inches and a 2 by 8 truss will measure 7 5 inches. Making the tops of your fascia boards the same angle as the roof allows you to easily place roofing material over them without creating bumps or ridges. Repairing a roof truss often requires replacing or reinforcing wood in its construction.

The overhang edge is always straight unless you use a slinky line. Generally a roof truss is composed of triangular shapes for proper support of the roof. Well a decent framer can fix it if he ignores the ties sets the trusses square to a wall and then works the ends with the cuts. Repairing this is called scabbing.

Roof trusses are engineered components. At the chimney the homeowner designed an inverted truss to straighten the sagged rafters. Determine the size of the roof truss to be repaired.