Repair Rotting Deck Joists

Q: How do I repair a deck joist that is starting to rot?

 

A: The easiest way is to repair a joist is to install a sister joist to strengthen the damaged area. Use a hammer and chisel to chip away the damaged wood. Liberally apply two coats of waterproof sealer over the damaged joist. Cut a reinforcing sister joist from lumber that is the same dimension as the damaged joist. Treat all sides of the new joist with the sealer, and face-nail it flush over the old joist with 10d nails or screws every 2 feet. Toe-nail the ends of the sister joist to the ledger and rim joist.

Related Posts

EHT Newsletter

Sign up for the monthly EHT Newsletter including DIY tips, industry updates, trends, and more

Hot Product

WiseBond™ 2″ DEEP POUR™ River Table Epoxy

WiseBond™ Epoxy systems are premium commercial grade resins for woodworkers, artisans, and DIY furniture enthusiasts. This epoxy isn’t your average everyday epoxy purchased at the local hardware store. WiseBond™ has been purposely developed for the wood table and furniture builders world. Our flagship epoxy, WiseBond™ Deep Pour™ Epoxy, sets us out from the crowd as […]

Read More >>