In many cases you ll need to fix sagging trusses or rafters to repair your roof.
How to fix a sagging roof beam.
If the line does not continually follow the bottom of the beam and the bottom of the beam is below the line the beam is sagging.
This article series describes explains the directions of forces in roof structures illustrating downwards force horizontal thrust and the causes of rafter sags rafters that disconnect from the ridge or top plate and why a sagging roof pushes the building walls outwards at the wall top.
Toenail the block onto the frame with four 6d nails.
The first step is to the basement first.
If that s what you re dealing with regarding your home take these steps to ensure your rafter or truss gets fixed properly.
You ll need a steel l channel to get your rafter or truss back into shape.
Cut a 45 degree angle so the edges will be properly mitered for a clean look.
Check the ceiling for sagging by attaching a string on one end of the beam and run it along the bottom edge of the beam.
Nail the wood about a quarter inch of the way straight into the block from the other side.
Cut the wood you ll use to wrap the new beam.
Nail a fill strip at the top and bottom of the beam which will bring the trim board to the desired width image 2.
Fixing a sagging roof by bolstering the beams bolstering the beams of your roof is another solution to repairing a sagging roof however it is often something that requires assistance from another able bodied person since beams can be extremely heavy.