Fixing A Broken Floor Joist

Not treating the initial problem.

Fixing a broken floor joist.

I suppose somewhere in the world there are floor joists that need to be repaired that have wide open clear joist bays with no pipes wires or obstructions. Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. Be prepared to get a little dirty but rest in the fact that fixing this problem properly will help avoid major headaches later. Correcting a problem joist is an easy repair and makes a big difference in your finished floor.

Fixing this type of joist problem is best left to the pros. It s best to identify problem joists and fix them before installing your underlayment and new floor covering. A severely arched bulged cracked or sagging floor joist can only get worse over time eventually deforming the floor above it. You will need to cut the board at least 6 inches longer on each side of the break to give it proper support.

There are joists used to support the floor as well as joists that help add stability to a ceiling or roof. How much repairing floor joists should cost. Then set new joists same height as existing ones alongside the old. I recently had to repair a floor joist that had cracked.

If only a few joists are rotted primarily at the bottom they can be repaired using a process known as sistering after the rot is cleaned away and the timber treated to prevent more problems a new joist is laid beside the old one and fastened to it. Tack a beam under the sagging joists. Repair sagging cracked or broken floor framing. Fixing broken cracked sagging floor joists.

When one or more need to be repaired or replaced it is important to know which approach to joist repair will yield the desired result with a minimum amountof effort. To prevent your floor from sagging and being damaged you may need to make a floor joist repair if the joist is broken. Repairs might include the installation of new joists or structural load transfer by constructing a header and adding trimmer joists. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in.

Average costs and comments from costhelper s team of professional journalists and community of users. Since this is a repair of a faulty or damaged floor joist it is imperative to do this project correctly and there are a few big mistakes to avoid. This should be done as soon as possible after you find a broken joist to avoid damage. A day until they re level.