How To Replace A Floor Joist

Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in.

How to replace a floor joist. Cut the new joist from a piece of 2 inch thick lumber. Slip an old work metal joist hanger onto the end of the joist. Squeeze a generous amount of carpenter s glue into the crack in the floor joist.

Jacking them up too fast may cause cracks in the walls and floors overhead. Short videos and slideshow documenting our attempt at replacing rotten joists and flooring in a kitchen of a house we are currently renovating. Tack a beam under the sagging joists.

Find a new floor joist with these exact same dimensions. The width of the joist must be identical to the width of the removed joist. Select a joist and select an end.

Use a tape measure to measure the length width and height of your existing floor joist. This part of. Repeat the process for all of the pieces you wish to replace.

Make another cut at the other end using the same strategy. Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. When replacing rotted floor joists it s important to be sure the girder and sill are still intact.

A day until they re level. Make sure you also buy the same type of joist. Make a cut all the way through the joist using your saw staying as close to the end you have selected as possible without hitting any nails or the joist hanger if it is present.