Deck repair and replacement around Sioux Falls
For decks that bounce, lean, rock or rot. Find out whether yours needs a repair or a fresh start.
Deck repair means fixing the parts of a deck that have worn out, from a few boards to joists, posts or the ledger. Replacement means tearing it off and building again. If your Sioux Falls-area deck is showing its age, we'll connect you with an independent builder who can look underneath and tell you which one makes sense.
Signs your deck needs attention
- Boards that feel soft or give underfoot
- A railing post you can wiggle by hand
- Black, crumbly wood where the deck meets the house
- A deck that has started to slope away from the house
- Posts that sank or rose after a hard winter
- Stair stringers that are split or pulling loose
- Rust streaks at hangers, bolts or nails
Why do decks fail around here?
Most failures come from water and frost. The ledger is the usual weak spot: if flashing was skipped or has failed, water runs behind the ledger every time it rains or snow melts, and the wood rots where you can't see it. Posts set on blocks or on footings shallower than the 42-inch frost depth listed for Sioux Falls can heave as the ground freezes, then settle unevenly when it thaws. Older decks were also often built with nails rather than bolts or structural screws at the ledger and guard posts.
Repair or replace?
| Often repairable | Usually time to replace |
|---|---|
| A handful of bad boards on a sound frame | Rot through many joists or the beam |
| Loose railing posts that can be re-bolted or blocked | A ledger rotted along much of its length |
| One or two heaved footings | Most footings too shallow or on surface blocks |
| Worn stairs on a solid deck | A deck that was never built close to code |
Be wary of anyone who wants to put new boards on a frame they haven't inspected. New boards on a rotting frame look fine until they don't.
Does a repair need a permit?
The city requires a permit for decks of any size, and structural repairs or a rebuild generally fall under that too. Swapping a few surface boards may not. Ask the builder, or call Sioux Falls Building Services at 605-367-8670, before work starts.
What affects the cost?
- How much of the frame is damaged once the builder opens it up
- Whether the ledger has to come off the house, and any rot in the house rim board behind it
- Footings that need to be dug out and replaced at full depth
- Disposal of old lumber and the materials you choose for the rebuild
A builder can usually give a firmer number once they've pulled a few boards. Expect some allowance in the quote for hidden damage.
Towns we cover
Common questions
Is it safe to use a deck with a loose railing?
Treat a loose guard as unsafe, especially on a deck more than a few feet off the ground. Keep people from leaning on it until it has been repaired.
Why did my deck posts move after winter?
Posts on surface blocks or shallow footings can be pushed up by frost. A Sioux Falls code summary lists a 42-inch frost depth, and footings that stop short of that are more likely to heave.
Can I keep my old frame and just replace the boards?
Only if the frame passes a close look. The builder should check the ledger, joists, beam and footings before quoting new boards.
Related services
More background: Sioux Falls deck permit and footing guide.
Planning a deck, or worried about the one out back?
Call and we will connect you with an independent builder who works in the Sioux Falls area.