Repairing A Cracking Floor Joist

Correcting a problem joist is an easy repair and makes a big difference in your finished floor.

Repairing a cracking floor joist.

A severely arched bulged cracked or sagging floor joist can only get worse over time eventually deforming the floor above it. A day until they re level. Slip an old work metal joist hanger onto the end of the joist. Tack a beam under the sagging joists.

Repair sagging cracked or broken floor framing. It s best to identify problem joists and fix them before installing your underlayment and new floor covering. Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. Floor joists constructed from large dimension lumber bear the weight of the structure above so notching them isn t recommended.

The standard solution is to sister a second joist next to the failing one and possibly add some support columns to a footing in the floor. I recently had to repair a floor joist that had cracked. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in. It s best to get a structural engineer to evaluate this problem.

For ceilings with exposed joists where the location of the crack is visible this repair should only take a couple of hours. Cracking or sagging that is allowing the home to go out of level plumb is a concern. Then set new joists same height as existing ones alongside the old. How to repair notched floor joists.

In this video this old house general contractor tom silva helps a homeowner repair a cracked floor joist. 1 place one adjustable jack post about two feet past each side of the.