Occasionally ceiling cracks can be a yellow or red flag that there is serious or structural issue.
Repairing stress cracks in attic joist.
Some cracks keep coming back no matter how well you repair them.
Remove any blocking or bridging above the sill or beam where the sister joist will go.
Place it next to the damaged joist with the crown side up.
The joist is by my measurements 1 5 x 3 5.
Measure mark and cut the piece of framing lumber to length using a circular saw.
6 drill pilot holes for the bolts on each side of the crack.
Usually most contractors and homeowners will view cracks a maintenance or cosmetic issue.
To repair a stress crack first cut out any loose drywall tape or joint compound with a utility knife or the corner of a taping knife.
Position the piece flat alongside the cracked rafter with the lower end at the wall.
Drill a 3 16 inch diameter hole down into the 1x3 strapping and through the drywall ceiling.
Use a c clamp on each end to hold the patching in position.
Use construction adhesive and c clamps to sister 2x4 s in place.
If you have wider cracks or sections of loose plaster the lath system beneath the plaster is likely failing in which case the plaster should be removed and replaced with drywall.
Therefore it is good to be able to recognize warning signs that a problem may exist.
How to repair drywall cracks in ceiling climb into the attic and remove the insulation from between the ceiling joists directly above the damaged drywall.
Are 2x4 s the appropriate material to sister on there.
For those pesky recurring cracks we prescribe good bye cracks.
Attach the piece to the.
Cut a sister joist the same length as the damaged joist.
This is usually enough time for a structure to finish settling.
Identify the cracked or sagging joist before it causes additional problems.
Place a level on the bottom edge of the joist to determine the amount of sagging that has occurred.
It forms an elastic film that stretches and contracts along with the crack.
Place one piece of patching material on each side of the joist.