By Deck Building Services · Last reviewed
How much maintenance does each decking material need?
Wood decks need cleaning plus periodic sealing or staining; capped composite and PVC need cleaning but no staining. All decks need the structure checked once a year.
| Material | Routine care | Refinishing |
|---|---|---|
| Pressure-treated pine | Sweep, clear gaps, wash yearly | Seal or stain when water stops beading — often every 1–3 years |
| Cedar | Gentle cleaning with a wood-safe cleaner | Oil or semi-transparent stain to keep color |
| Capped composite | Wash with mild soap; clean spills promptly | Not stained; follow manufacturer care guide |
| PVC | Wash; rinse pool chemicals | Not stained |
What is a good yearly deck maintenance schedule?
- 1Spring: inspect framing, ledger, posts, railings and stairs after winter; wash the surface; reset popped fasteners.
- 2Late spring or early fall: on wood decks, refinish if the water test shows the finish has worn off.
- 3Summer: keep gaps clear, move planters periodically so boards beneath can dry, and check that grills sit on heat-safe mats.
- 4Fall: clear leaves and needles, which hold moisture and stain boards; clean gutters above the deck.
- 5Winter: shovel with a plastic blade and use only ice-melt the decking manufacturer allows.
How do you know when a wood deck needs sealing?
Sprinkle water on the boards. If it beads up, the finish is still working; if it darkens the wood and soaks in within a few minutes, it's time to clean and re-seal.
Horizontal surfaces wear far faster than railings and vertical boards. Many homeowners refinish the floor every cycle and the railings every other cycle. Full sun and heavy foot traffic shorten the interval; shaded decks may last longer between coats but need more attention to mildew.
Which structural parts should be checked every year?
- Ledger: tight to the house, flashed, with no staining or soft wood behind it.
- Joists and beams: probe tops and ends with a screwdriver for soft spots.
- Hangers and fasteners: present, tight and not badly rusted.
- Posts and footings: plumb, solid at the base, not heaved or sunk.
- Railings: no noticeable movement when pushed firmly.
- Stairs: stringers solid, treads secure, landing level, handrail tight.
Our deck safety inspection checklist walks through each item in more detail.
What deck maintenance mistakes cause damage?
- High-pressure washing that gouges wood and raises fibers.
- Applying stain to a damp deck or in hot midday sun.
- Letting leaves and debris pack the gaps between boards.
- Using metal shovels or rock salt on composite or PVC.
- Painting over rot instead of replacing damaged boards.
- Ignoring a wobbly railing until it fails.
How does how to maintain a deck differ across the states we serve?
How often a deck needs cleaning and sealing depends on how often it gets wet. The figure varies most between Washington (95) and Minnesota (60).
| State | Wet days / yr (median) | What it means |
|---|---|---|
| Georgia | 80 | Frequent rain: flashing, drainage and airflow protect how to maintain a deck |
| Illinois | 74 | Drier spells: sun and checking are as important as moisture for how to maintain a deck |
| Kansas | 60 | Drier spells: sun and checking are as important as moisture for how to maintain a deck |
| Maryland | 81 | Frequent rain: flashing, drainage and airflow protect how to maintain a deck |
| Massachusetts | 82 | Frequent rain: flashing, drainage and airflow protect how to maintain a deck |
| Minnesota | 60 | Drier spells: sun and checking are as important as moisture for how to maintain a deck |
| North Carolina | 75 | Drier spells: sun and checking are as important as moisture for how to maintain a deck |
| Pennsylvania | 79 | Drier spells: sun and checking are as important as moisture for how to maintain a deck |
| Tennessee | 84 | Frequent rain: flashing, drainage and airflow protect how to maintain a deck |
| Virginia | 77 | Drier spells: sun and checking are as important as moisture for how to maintain a deck |
| Washington | 95 | Frequent rain: flashing, drainage and airflow protect how to maintain a deck |
Figures are medians across our covered communities in each state, from NOAA 1991–2020 climate normals and the Census Bureau's 2020–2024 American Community Survey. Each state and community page explains local conditions in more detail.