Deck Repair in St. Louis, MO: Boards, Railings, and Stairs That Last

Deck repair in St. Louis, MO is the difference between a deck you use and a deck you avoid. St. Louis's sun and humidity cycles are hard on wood — boards cup, fasteners pop, railings loosen, and stair treads split. Most deck problems are repairable for far less than a rebuild, and catching them early is what keeps a deck safe and serviceable. Here's what we fix and how we keep it sound.

The deck repairs we handle

• Loose or cupped deck boards re-fastened or replaced
• Wobbly railings re-secured and posts reinforced
• Rot in ledger boards, posts, and joists cut out and spliced
• Sagging or split stair treads replaced
• Loose stair stringers re-secured
• Deck staining and sealing after repair

Full scope on our exterior and outdoor repairs page.

The loose board and the popped fastener

A deck board that's loose or cupping is usually a fastener that's backed out or a board that's twisted. We re-fasten with the right screw (not the original nail that popped), and replace boards that have cupped beyond saving. The right screw is the whole job — it holds and it doesn't pop.

Railings and safety

A wobbly railing is a safety issue, not a cosmetic one. We re-secure the posts, reinforce the connection at the deck frame, and check that the railing can take the load a railing is supposed to take. If a post has rotted at the base, we cut it out and splice in new — a railing is only as strong as its weakest post.

Stairs and stringers

Stair treads split along the grain and stringers loosen where they meet the deck. We replace split treads with the right grain orientation (treads crown-side up so they shed water) and re-secure stringers that have pulled loose. Stairs are the highest-traffic part of a deck and the first to need repair.

Staining after repair

A repaired deck should be stained or sealed to protect the new wood and refresh the old. We stain decks after repair — it extends the life of the whole structure. We use a stain rated for St. Louis's sun and humidity, and we can pair it with a pressure washing for a full refresh.

Get a deck repair quote

Send us a photo of the deck and what's failing — loose boards, wobbly railing, rot, split treads. We quote flat from that. We repair decks across the metro, from Kirkwood to Chesterfield to St. Charles. Request a deck repair quote today.