Shoring Floor Joists

For this fix to work well the upper edges of the joists must be solidly fastened to the subfloor above.

Shoring floor joists.

Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. Depending upon the conditions it is possible to strengthen or repair existing framing members such as floor joists or roof rafters by adding reinforcing material. Crawl space floor below to take some weight off the joists until the adhesive cures in a day or two. A day until they re level.

In some cases pouring floor leveling compound will fix the problem. Tack a beam under the sagging joists. Adding that extra layer makes a big difference tom says. Cut a piece of 2 by 6 or 2 by 8 lumber according to the width.

A layer of 3 4 in. Thre ways to fix a sagging or sloping floor add reinforcing metal. Nail the block in place with 16d. Measure the width between the span of two joists.

All gateway industries joists beams stringers are compatible with all major aluminum shoring systems including aluma systems aluma beam aluma stringer aluma strongback and jasco s hi lite beam hi lite stringer and patent construction harsco patent joist patent stringer and symons joist symons beam and safway joist safway stringer and waco scaffolding beam waco stringer etc. Plywood firmly fastened to the undersides of joists helps prevent this side to side bending and stiffens the floor. Place the lumber block between the two joists. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in.

Instead it may be an issue with joists and beams below your floor that require shoring up.