The longer the rafters in your roof, the more important it is to brace them and keep them strong. Measure the length of one of your rafters and mark the rafter at its midpoint. Hang a plumb bob from the nail and mark the point where it touches the joist below the rafter using a pencil. Click to see full answer. Keeping this in view, why is roof bracing needed?Most people in the building industry probably assume that roof truss bracing is only necessary to prevent the trusses from being blown over. Lateral forces from the roof battens that, apart from supporting the roof material, are also preventing the truss top chords from buckling.Secondly, how do you reinforce roof rafters? Reinforce the Trusses Apply construction adhesive. Apply construction adhesive along the edge of the truss to strengthen the connection to the plywood roof deck. Stiffen Trusses. Brace gable ends. 4a and 4b. Clean out gutters. Repair and caulk flashing. Check for loose or damaged shingles. Lift shingles or underlayment. People also ask, how do you support sagging rafters? Fixing Roof Decking Measure the damaged area between your roof rafters or trusses. Cut a piece of 1/2 inch plywood that will cover the area. Because driving nails up into the sheathing material will make things worse, glue a piece of 1-inch rigid Styrofoam to your piece of plywood. What is gable bracing?The horizontal braces are used to transfer the wind forces applied to the gable end into the roof and ceiling and to distribute these forces over a large enough area to avoid local failures of the roof sheathing, ceiling drywall or plaster.