Drill holes in angle iron.
Raising sagging roof rafters.
Spread polyurethane glue into the crack with a stiff bristle brush.
So you should start by inspecting the roof from the under side or attic.
The first step is to find out how many rafters are sagging and if anything else is damaged.
You may find that.
Determine the extent of damage.
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.
The first and foremost step is to find out how many and from where the rafters are sagging.
Remove the chisel and wet the crack with a wet rag.
Keep the plywood in place using a piece of lumbar strapping until you can get a roofing expert to repair it.
If there is any other damage it should also be fixed before moving to the next step.
How to straighten sagging roof rafters.
Place a fascia board up under the roof sheathing and nail it with a hammer across the ends of the rafters to strengthen them.
Actuate the intensity of damage.
Push up on the plywood until the foam is touching the roof decking s underside.