How To Reinforce Floor Joists

Measure the width and length of the existing joist.

How to reinforce floor joists. You will have to use a very sturdy piece of wood or some steel plating to reinforce the floor joists. Squeeze several thick beads of construction adhesive on the wide side of the original joist. It might be a good idea to make a drawing of the floor joist as a reference.

Determine the location of your plumbing drain. Add an additional row of fas teners midway between the joists to pull the layers tightly together. Be sure to jot down your measurements and mark it on the diagram so you have a good record of where they go.

For a double header measure back three inches from your plumber box 3 is the width of a doubled header and mark a square line on the. Determine the size of your plumber box. Steps to head off a floor joist.

Lay the new sheets perpendicular to the floor joists and orient panel ends over joists. Use a circular saw to start the cut. How to reinforce an attic floor with sister joists clear the joist spaces pull out all insulation and any debris from all of the joist spaces so you can see the full length of each joist including where it meets the exterior walls.

Step 4 reinforce the floors. Choose ring shank nails or screws that are long enough to penetrate the joists by 11 2 in and space them every 6 in. Also remove any blocking or bridging between the joists as applicable.