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Deck or patio gray and discolored? Here's Who to Call
Wood decks turn gray within 6–12 months of UV exposure as lignin on the surface breaks down. Composite decks develop surface mold in humid climates. Concrete patios collect dirt, moss, and leaf tannin stains. Pressure washing ($150–$350 for a standard deck, $100–$250 for a patio) strips the gray layer and restores the wood's natural tone. For wood decks, washing should be followed by brightener (oxalic acid, $15–$30 DIY), drying 48–72 hours, then staining or sealing ($1–$3/sq ft professional, $0.30–$0.75/sq ft DIY). Without sealer, the deck re-grays within a year.
What's going on
How to fix deck or patio gray and discolored
Some "deck or patio gray and discolored" cases look simple, but getting it wrong almost always costs more than calling a pro: hidden leaks, fire risk, code violations, and insurance headaches. A licensed cleaner will diagnose the exact cause, use the right professional tools, and stand behind the repair. Most local pros offer free quotes and can visit the same day or the next.
Who to call
cleaner
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Symptoms to look for
- 01
Wood deck has turned silver-gray instead of its original brown or cedar tone
- 02
Black or green mold spots on deck boards, especially between boards and in corners
- 03
Concrete patio has dark stains from fallen leaves or standing water
- 04
Moss or algae growing in shaded sections of patio or walkways
- 05
Previous stain is peeling, flaking, or worn through to bare wood
FAQ
Frequently asked questions
Who should I call for: Deck or patio gray and discolored?
Call a licensed cleaner. cleaners have the specialized training, tools, and insurance to diagnose deck or patio gray and discolored safely and stand behind the fix. Most offer free quotes and can visit the same day or the next.
Can I fix this myself?
Some minor cases can be handled DIY, but most require a licensed cleaner to avoid costly rework and safety risks. A free quote takes under a minute.
How fast can a pro come out?
Most cleaners offer same-day or next-day visits for non-emergency issues. True emergencies (burst pipes, gas smell, no heat in winter) are typically handled within 1–4 hours.
How much does it cost to fix?
Costs vary by severity and your location. Submit a free quote request to get real pricing from local pros in your area.
What are the signs of: Deck or patio gray and discolored?
Wood deck has turned silver-gray instead of its original brown or cedar tone. Black or green mold spots on deck boards, especially between boards and in corners. Concrete patio has dark stains from fallen leaves or standing water. Moss or algae growing in shaded sections of patio or walkways. Previous stain is peeling, flaking, or worn through to bare wood.