In this video, Ask This Old House carpenter Nathan Gilbert helps a homeowner repair her deck by replacing rotted hangers and re-securing the joist to the structure.
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Nathan Gilbert visits a deck that had a joist fall down. The homeowners use the deck as their main entrance to enter and exit their home, so there is a lot of foot traffic. Nathan puts the joist back into place and demonstrates how to remove corroded joist hangers and replace them with new ones. He also shares how to prevent the hangers from rusting in the future. After, Nathan is joined by Tom Silva and Kevin in the workshop to talk about choosing the proper fasteners and hangers for the project.
Time: 1 to 2 hours
Cost: Under $30
Skill Level: Moderate
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Galvanized steel deck screws [https://amzn.to/3hE0Ba5]
Steps for replacing a deck joist hanger
1. Remove the fallen joist.
2. Remove what’s left of the corroded hanger.
3. Pop up the old nails from under the deck and remove them from the top of the deck.
4. Flip the joist 180 degrees from how it was to have the old nail holes facing the ground.
5. Use a scrap piece of wood to prop the joist up.
6. Put a few screws into the joist to hold it in place until you get the hanger on.
7. Nail the hanger into place.
8. On the side opposite of the ledger board, Nathan used an angle bracket only because there was a ledge that offered support for the joists.
9. Nathan used 2” screws with a ceramic coating to reattach the deck boards to the reinstalled joist.
10. Remove the rest of the old hangers and replace them with new joist hangers.
Where to find it?
Nathan replaced the rotted joist hangers with 2×8” Face-Mount Galvanized Joist Hangers [https://amzn.to/3fut7YZ], which are manufactured by Simpson Strong-Tie [https://www.strongtie.com/] and can be found at most home centers.
To resecure the deck boards to the joist, Nathan used a drill driver and 2” Deckmate star drive coated deck screws [https://amzn.to/3hE0Ba5], which can also be found at home centers.
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From the makers of This Old House, America’s first and most trusted home improvement show, Ask This Old House answers the steady stream of home improvement questions asked by viewers across the United States. Covering topics from landscaping to electrical to HVAC and plumbing to painting and more. Ask This Old House features the experts from This Old House, including general contractor Tom Silva, plumbing and heating expert Richard Trethewey, landscape contractor Jenn Nawada, master carpenter Norm Abram, and host Kevin O’Connor. Ask This Old House helps you protect and preserve your greatest investment—your home.
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How to Replace a Deck Joist Hanger | Ask This Old House