Fixing A Broken Floor Joist

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

Fixing a broken floor joist. Not treating the initial problem. Fixing broken cracked sagging floor joists. Fixing this type of joist problem is best left to the pros. You will need to cut the board at least 6 inches longer on each side of the break to give it proper support.

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. Average costs and comments from costhelper s team of professional journalists and community of users. To prevent your floor from sagging and being damaged you may need to make a floor joist repair if the joist is broken. How much repairing floor joists should cost.

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. 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. There are joists used to support the floor as well as joists that help add stability to a ceiling or roof. I recently had to repair a floor joist that had cracked.

This should be done as soon as possible after you find a broken joist to avoid damage. It s best to identify problem joists and fix them before installing your underlayment and new floor covering. A day until they re level. 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.

Tack a beam under the sagging joists. A severely arched bulged cracked or sagging floor joist can only get worse over time eventually deforming the floor above it. Then set new joists same height as existing ones alongside the old. Repairs might include the installation of new joists or structural load transfer by constructing a header and adding trimmer joists.

Be prepared to get a little dirty but rest in the fact that fixing this problem properly will help avoid major headaches later. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in. I recently had to repair a broken floor joist that had cracked. Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall.