Jack Up Sagging Floor Joist

Raise it another 1 8 inch weekly.

Jack up sagging floor joist.

Following the instructions on the jack raise it about 1 8 inch this will typically involve turning a lever near the top or bottom of the jack that twists up the threads. 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. Make repairs to settling piers and weak joists to fix swagging floors and roof lines. Sistering is the process of mating up two boards with bolts nuts and washers so that the new board corrects or supports the other weaker one.

Crawl space joist supports are steel adjustable support posts that are installed to repair sagging floors. These reinforcing joists install quickly in crawl spaces with a complete installation taking about a day and provide a permanent solution. Use the level each time to check the sag on the joists until the sag appears to be gone. If you have access to the basement or crawlspace it is possible to jack up saggy joists until they are level and then sister them so that they remain straight after the jacks are removed.

Thre ways to fix a sagging or sloping floor. Jacking up a floor and leveling it is easy with these simple instructions. The only tools required is a bottle jack string straight claw hammer circular saw and a light source. The sagging floor was the symptom and somewhere under the house there had to be a cause.