Straightening Sagging Floor Joists

Intervals will help stiffen the floor.

Straightening sagging floor joists.

If the joists are damaged or undersized blocking will not usually be sufficient to solve the problem. Framing lumber is the typical. Sistering joists means beefing them up with additional material. We got muddy because we were in a dirt crawlspace doing just that crawling.

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. We used 18 000 pound screw jacks 4 4 lumber a cir. This article provides step by step instructions and pictures on how to make structural repairs by sistering floor joists alongside weak joists. For second floor joists remove 24 inch wide strips of the drywall plaster or paneling from the first floor ceiling to install rows of blocking.

Doing so strengthens weak joists and can help straighten sagging joists. Cost time and skills. Repair sagging cracked or broken floor framing. If you have access the joist spaces from below adding solid blocking between the joists at 4 ft.

Lee has over two decades of hands on experience remodeling fixing and improving homes and has been providing home improvement advice for over 12 years. Sign up for the fine homebuilding tip of the day and get daily tips and special offers delivered to your inbox. Understanding the common structural shortcomings that cause floors to sag and what to do about them. I recently had to repair a floor joist that had cracked.

This job took two people one afternoon.