How To Raise Sagging Floor With Rotted Joists

Thre ways to fix a sagging or sloping floor.

How to raise sagging floor with rotted joists.

Two four by six wood beams of 8 to 10 feet each as straight as you can find them. Place support of the floor joists with wood studs. You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings. Then set new joists same height as existing ones alongside the old.

While it is a good idea to replace rotted material with 2x8s it may require some notching to fit between the sub floor and ledger board. On the top side of the floor another fix it idea to lay down new hardwood over the existing floor. Well after doing the navy seal crawl up under the house we found that the joists that were supporting that floor were not actually attached to the sill plate any longer as seen in the photograph below. 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.

Generally newer home floor joists are made from 2x8s or new engineered i beams older homes however may have 2x6s instead. Four or five beams of the same size as your floor joists typically two by eight and as long as the room. Repair sagging cracked or broken floor framing. Tack a beam under the sagging joists.

Before undergoing any substantial changes to the structure of the house be sure you consult a contractor or other professional. Raising a floor joist is a process which many homeowners can tackle if the damages are not too extreme and the initial causes aren t pervasive. Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. I recently had to repair a floor joist that had cracked.

The method used to fix the problem depends on the reason the joist is sagging and the number of joists. 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 sandwiching the member on either side with plywood is sometimes worthwhile but the plywood must be installed correctly for greatest strength. Understanding how the entire residential structure fits together is key when significantly altering one portion of the. A dozen metal rafter ties.

The sagging floor was the symptom and somewhere under the house there had to be a cause. Shows raisinge a sagging floor gradually with bottle jacks. Temporary adjustable floor jack tall enough to reach the floor joists from the basement floor. A dip or slope in the floor could indicate one or more saggy joists beneath the subfloor.