Jack Up Sagging Floor Joist

Make repairs to settling piers and weak joists to fix swagging floors and roof lines.

Jack up sagging floor joist.

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. Crawl space floor joist jacks. 1 16 of 140 results for floor joist jack vestil fjb 150 basement floor jack 54 150 height range maximum height capacity lbs 2588 minimum height capacity lbs 11200 4 4 out of 5 stars 194. Thre ways to fix a sagging or sloping floor.

Raise it another 1 8 inch weekly. 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. 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.

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. These reinforcing joists install quickly in crawl spaces with a complete installation taking about a day and provide a permanent solution. Crawl space joist supports are steel adjustable support posts that are installed to repair sagging floors. Jacking up a floor and leveling it is easy with these simple instructions.