Floor Joist Repair Sistering

Apply a bead of construction adhesive in an s pattern along the length of a joist.

Floor joist repair sistering.

Driving 16d common nails in old hard wood is difficult. If the new sister bears on wood at least 1 5 on each end then you re good to go. Sistering joists if your home s structure needs some additional support the best solution may be to double down on the joists meaning we will add sistering joists to the structure. Space the loops of the s about 6 to 8 inches apart.

This solution provides your home with increased stability and will restore structural integrity to floor joists that have been damaged by moisture. Rather than reinstall your joists you can create second or sister joists alongside the first. The easiest way to repair a compromised joist is to firmly attach another board of equal or larger size to the questionable joint. These problems must be addressed firsthand prior to implementing any restoration steps.

Then attach the sister joist using three 16d common nails driven every 16 in. But it s usually best to run the sister joist over the entire span. Essentially sliding a whole member beside it and nail the heck out of it from both sides with a lot of nails. Sister joist correcting a problem joist is an easy repair and is usually accomplished by fastening a new joist next to a damaged floor joist doubling the thickness of the framing member.

Most often floor joists need to be sistered because of two problems either water damage which leads to rot or termite damage that crumbled the joist. The adhesive strengthens the bond between the existing. When the sagging joists are level apply a generous bead of construction adhesive to the existing joist. Step 1 evaluate your situation.

This board is called a sister board and the whole process is. If there was water damage make sure that whatever leaky pipe or condensation issue caused the rot is fixed. Before you begin floor joist repair you should examine and evaluate your current situation.