How do you get a wood deck ready for winter?
Short answer: Before the first freeze, sweep the deck and clear debris from the gaps between boards. Clean it with a deck cleaner used per its label. Probe suspect wood with a screwdriver for rot, and tighten loose boards and screws. Seal only if the forecast stays inside the product's label temperature range. In winter, use a plastic shovel.
What should you do to a deck before winter?
Most winter prep is cleaning and inspection. Do it on a dry fall day, before the first hard freeze.
| Step | What to do |
|---|---|
| 1. Clear | Sweep, then clear the gaps between boards |
| 2. Clean | Use a deck cleaner, following its label |
| 3. Inspect | Probe for rot; check boards, fasteners, ledger, stairs, rails |
| 4. Repair | Tighten loose boards, replace split or rotten ones |
| 5. Seal (optional) | Only within the label’s temperature and dry-time window |
| 6. Clear the surface | Move planters, mats, and furniture |
How do you clean between deck boards?
Decks.com notes that damp or rotting leaves stuck between boards can promote mold and mildew. A putty knife helps with packed-in debris Open gaps also help water drain.
Then wash the deck with a cleaner made for your surface, following its label for dilution, dwell time, and rinsing. For its Transcend, Enhance, and Select composite lines, Trex says to use warm soapy water and a soft-bristle brush to remove dirt and debris from the embossing pattern.
How do you check a deck for rot?
Decks.com suggests using a screwdriver. If the wood is easily penetrated or feels soft, that spot may be rotting. Tiny holes can be signs of insects.
Focus on spots that tend to stay wet:
- Board ends and areas around fasteners
- Stair treads and stringers
- Posts where they meet the ground or footing
- The ledger board, where the deck attaches to the house
Decks.com says improper ledger flashing can be a key factor in rot. Treat ledger damage as a possible structural problem and have a qualified deck builder or contractor inspect it.
Should you tighten or replace deck boards before winter?
Yes, when needed. Decks.com says loose boards should be tightened and split or rotting boards replaced. Check for screws or nails sticking up, and make sure stairs and railings are tightly secured and free of rot. Snow can hide these hazards.
Can you stain or seal a deck in the fall?
Sometimes. Stain and sealer labels typically list minimum air and surface temperatures, a rain-free period, and a dry time. Read the limits on the product you bought, then check the forecast, including overnight lows, for the full cure time. If the forecast won’t cooperate, wait until spring.
When you do apply finish, Decks.com recommends removing plants and furnishings and covering them with plastic.
Should you move furniture and planters off the deck for winter?
It is a sensible step. Planters, mats, and furniture can catch leaves and hold moisture against the boards.
On composite, Trex urges caution with rubber-backed mats, which it says may discolor or lighten its decking. See our guide on storing patio furniture for winter.
How do you remove snow from a deck?
Use a plastic shovel. Trex says a plastic shovel may be used on its Transcend, Enhance, and Select lines. For its early-generation boards, it says never to use a metal snow shovel and that shovel scratches are not covered under warranty.
For safe lifting, see how to shovel snow safely.
Can you use ice melt on a deck?
On Trex decking, yes. Trex says calcium chloride or rock salt can be used to melt snow and ice on its Transcend, Enhance, and Select lines, and on its early-generation boards. For the early-generation products, it says to rinse the salt off when first practical.
This guidance applies only to Trex products. For wood decks and other composite brands, check the decking maker’s care guide and the ice melt label before using any product.
Quick answers
When should you winterize a deck? Before the first hard freeze.
Should you cover a wood deck for winter? Neither source we used recommends one.
Does salt damage a composite deck? Trex says calcium chloride or rock salt can be used on its decking. Other brands may differ, so check their care guide.