A: Tom Silva replies: I think so, with the help of some polyurethane glue. Force the crack open a bit, dampen it with water—polyurethane cures faster on wet wood—then use a stiff brush to force the glue into the crack. Omega Trust Prosperity Program Texas.

Now brace the rafter tail in its original position until the glue cures. One way to do this is by temporarily screwing a board across the underside of the rafters on both sides of the cracked one. This will 'borrow' the strength of the good rafters to support the damaged one. If you want to strengthen the rafter even more, take a 1x fascia board that's an inch or so wider than the rafter ends and fasten it permanently across all of the rafter ends. For this fix to work, however, the roof sheathing has to extend past the rafter tails by at least an inch so you can tuck the fascia up underneath it.

Force the cracked rafter into position. Before attempting a repair, the cracked rafter should be restored to its proper position. Much like a physician sets a broken bone, you will need to 'set' the broken rafter by using a 2x4 board. Why do rafters crack? Relating the story of what a client heard that caused them concern, and how the idea behind the cause was developed. Dec 21, 2010 Roof rafter cracked - how bad. Was cleaning the attic noticed that one of the rafters had cracked and was in the. Cost more than the repair. A cracked roof rafter can create a sagging and unsightly roof. A cracked roof rafter needs to be repaired and can be done byf an experienced do-it-yourselfer.