How To Repair A Cracked Roof Joist

If you have a textured ceiling.

How to repair a cracked roof joist.

6 drill pilot holes for the bolts on each side of the crack. You can use plasterer s hessian tape fibreglass mesh tape or adhesive paper tape. Use tape to cover the crack. Place a level on the bottom edge of the joist to determine the amount of sagging that has occurred.

Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions. Use your tape measure to record the distance of both rafter legs. If there are minor cracks these can be repaired by reinforcing the joist by nailing wooden planks to it. To undo the damage done to the ceiling scrape off the loose tape and re tape the joint either with a drywall repair kit or paper tape and joint compound.

The roof joist is made of wood. If the problem worsens it can cause the ceiling or upper floor to sag crack the drywall covering on the ceiling and compromise the structural integrity of your home. Repeat the process for the joist beneath your old roof rafter. Cut a sister joist the same length as the damaged joist.

Place one piece of patching material on each side of the joist. In order to get at the broken roof joist you will need to either go into the attic or remove the ceiling tiles on a floor above. Once you locate the broken joist mark it with a light colored marker so you can find it easily again when you get the materials you need. Get to the roof and find out the extent of the damages on the joists.

Use a c clamp on each end to hold the patching in position. How to repair a cracked or sagging joist. Step 1 locate broken roof joist. Wipe the crack area with a damp cloth to remove all dust.

Identify and mark the joists needing repairs. Identify the cracked or sagging joist before it causes additional problems. Remove any blocking or bridging above the sill or beam where the sister joist will go. Repair and reinforce a ceiling joist by affixing a new plank to the side of the joist.

Apply a layer of drywall jointing compound or grout to the crack.