Floor Joist Repair Sistering

This is referred to as sistering the plan was to sister a new joist next to the old one.

Floor joist repair sistering. Rather than reinstall your joists you can create second or sister joists alongside the first. But it s usually best to run the sister joist over the entire span. This board is called a sister board and the whole process is. Apply a bead of construction adhesive in an s pattern along the length of a joist.

Then attach the sister joist using three 16d common nails driven every 16 in. 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. Driving 16d common nails in old hard wood is difficult. 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.

Before you begin floor joist repair you should examine and evaluate your current situation. Consider how weakened or damaged the joists are and also whether a weight above them could be causing the joists to fail. The most common way joists are repaired is to sister it up. When the sagging joists are level apply a generous bead of construction adhesive to the existing joist.

Space the loops of the s about 6 to 8 inches apart. These problems must be addressed firsthand prior to implementing any restoration steps. 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. This solution provides your home with increased stability and will restore structural integrity to floor joists that have been damaged by moisture.

If the new sister bears on wood at least 1 5 on each end then you re good to go. If there was water damage make sure that whatever leaky pipe or condensation issue caused the rot is fixed. The easiest way to repair a compromised joist is to firmly attach another board of equal or larger size to the questionable joint.