Repairing Stress Cracks In Attic Joist

Cut two 4 foot long 2x4 s to sister on each side of the joist.

Repairing stress cracks in attic joist.

Occasionally ceiling cracks can be a yellow or red flag that there is serious or structural issue. Use construction adhesive and c clamps to sister 2x4 s in place. Therefore it is good to be able to recognize warning signs that a problem may exist. Position the piece flat alongside the cracked rafter with the lower end at the wall.

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. Some cracks keep coming back no matter how well you repair them. This is usually enough time for a structure to finish settling. Are 2x4 s the appropriate material to sister on there.

Place a level on the bottom edge of the joist to determine the amount of sagging that has occurred. Use a c clamp on each end to hold the patching in position. Place it next to the damaged joist with the crown side up. Wait at least six months to a year before repairing stress cracks in new construction.

The joist is by my measurements 1 5 x 3 5. Remove any blocking or bridging above the sill or beam where the sister joist will go. 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. Measure mark and cut the piece of framing lumber to length using a circular saw.

Cut a sister joist the same length as the damaged joist. Attach the piece to the. Drill a 3 16 inch diameter hole down into the 1x3 strapping and through the drywall ceiling. Usually most contractors and homeowners will view cracks a maintenance or cosmetic issue.

It works best on hairline cracks but it s worth a try on wider cracks too. 6 drill pilot holes for the bolts on each side of the crack. For those pesky recurring cracks we prescribe good bye cracks. Place one piece of patching material on each side of the joist.