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. Squeaks in a floor usually mean that the subfloor has loosened from the joists. Plywood firmly fastened to the undersides of joists helps prevent this side to side bending and stiffens the floor. Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. Cut a piece of 2 by 6 or 2 by 8 lumber according to the width.

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. 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. Thre ways to fix a sagging or sloping floor add reinforcing metal. Finally many pros have praised luxor s ibs2000 an interlocking bridge system sized especially to fit between the flanges of i joists for quick added stiffness.

Measure the width between the span of two joists. A layer of 3 4 in. Jacking them up too fast may cause cracks in the walls and floors overhead. A day until they re level.

Nail the block in place with 16d. In some cases pouring floor leveling compound will fix the problem. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in. Crawl space floor below to take some weight off the joists until the adhesive cures in a day or two.

Tack a beam under the sagging joists.