If you're staining a deck without pressure washing it first, you're setting yourself up for a callback. Dirt, mildew, and old coating residue block new stain from penetrating the wood grain -- the stain sits on top instead of soaking in, peels within a year, and the customer blames you. Here's how to do deck cleaning and restoration right, and how to price the full job.

The Quick Answer

Deck restoration pricing in 2026:

Basic pressure wash: $0.44-$0.57 per sq ft, average $100-$250 per deck
Pre-stain prep wash: $0.75-$1.25 per sq ft (includes wood brightener and more intensive cleaning)
Deck staining: $550-$1,250 for a standard deck
Full restoration (wash + prep + stain): $0.50-$1.50 per sq ft all-in
Maximum PSI for wood: 1,000-1,300 PSI. Never over 1,500 PSI on any wood decking.

A 500 sq ft deck at $1.00/sq ft for the full restoration package is a $500 job. Add premium stain and light sanding and you're looking at $800-$1,200. These are among the highest-margin jobs in residential pressure washing.

Why Cleaning Before Staining Isn't Optional

This is a technical issue, not just aesthetics. Mildew, algae, and old stain residue physically block new stain from soaking into the wood grain. When stain can't penetrate, it forms a film on the surface that peels and cracks -- typically within 6-12 months outdoors.

The bigger problem: if mildew is left under the new stain, it keeps growing. The fresh finish seals the moisture and organisms in, accelerating wood rot from the inside. You end up with boards that look fine on top and are deteriorating underneath. By the time the homeowner figures it out, the damage is structural.

Proper cleaning isn't a service add-on -- it's what makes the stain job last 3-5 years instead of one.

PSI and Technique for Wood Decks

Wood is soft. Wrong pressure, wrong angle, or too close a nozzle and you'll leave raised grain, etching, or fuzzy fibers that are nearly impossible to stain evenly. Here's what works:

PSI: 1,000-1,300 PSI for pressure-treated lumber. Drop to 600-800 PSI for cedar, pine, or older weathered wood.
Nozzle: 25-degree for heavy staining and grime, 40-degree for general cleaning. Never use 0- or 15-degree tips on wood.
Direction: Always spray with the grain, not across it. Cross-grain washing raises wood fibers and creates an uneven surface that resists stain penetration.
Distance: Keep the nozzle 12-18 inches from the surface. Closer than 8 inches on wood and you'll etch it.

For decks with heavy mold or algae, apply detergent at low pressure first -- the same approach covered in our soft washing guide. Let it dwell 10-15 minutes to kill the organisms, then rinse with higher pressure. This two-step method cleans more effectively and at lower overall PSI than pressure alone.

The Full Pre-Stain Process

Inspect the boards. Check for rot, popped nails, splinters, and soft spots. Document damage in writing before you start -- so you're not blamed for deterioration that was already there. Replace any rotted boards before cleaning.
Apply wood cleaner or brightener. Products like Defy Wood Brightener or Restore-A-Deck open the grain and neutralize tannins for better stain penetration. Dwell time: 15-20 minutes. Don't let it dry on the surface.
Pressure wash. 1,000-1,300 PSI, following the grain, top to bottom. Pay extra attention to railing bases, board edges, and high-traffic zones.
Rinse completely. All cleaner must come off before the deck dries. Residue prevents stain adhesion.
Let it dry. 48-72 hours minimum, longer in humid climates. Most stains require wood moisture content below 15%. If you have a moisture meter, use it.
Light sand if needed. Washing raises wood grain. A quick pass with 60-80 grit sandpaper knocks it back and gives stain a better surface to grip. This step is what separates a professional result from an average one.

Pricing the Full Restoration Package

The biggest mistake contractors make on deck jobs is treating the cleaning and staining as separate, low-margin services. Package them as a restoration job and the numbers look completely different.

300 sq ft deck: $400-$600 total (wash + brightener + stain), 4-5 hours = $80-$120/hr effective rate
500 sq ft deck with railings: $700-$1,200, 6-8 hours of work
800 sq ft deck with sanding: $1,500-$2,500, 10-14 hours

Material costs are low -- stain and chemicals typically run $50-$150 per job. The rest is labor, and it's your labor. These margins are significantly better than standard concrete or house washing work at the same job duration.

How to Sell the Upsell on the Job

Most customers book a cleaning and don't think about staining until you bring it up. When you're walking the property for an estimate, point out what's possible: "The deck is going to look great cleaned, but if you want it protected for the next 3-5 years, we can stain it at the same time. One application does more than repeated cleanings ever will."

That conversation converts roughly 30-40% of deck cleaning customers into full restoration jobs in most markets. The work is already on your schedule -- you're just expanding the scope while you're already there.

Offer two tiers: a basic stain and a premium stain option. Most customers who are already spending $200-$300 on a cleaning will upgrade to premium when it's framed as the better long-term value.

Bottom Line

Deck cleaning alone is a fine service. Deck restoration -- cleaning, brightening, and staining -- is one of the highest-margin jobs in residential pressure washing and worth 3-5x more per job for roughly the same customer interaction. Get the process right, offer the package, and you'll build a reputation that generates referrals on its own. If you want customers to get instant pricing for deck restoration on your website before they call, try QuoteSnap for free. It captures the lead whether they book immediately or just browse.

Deck Cleaning and Restoration: Pressure Washing Before Staining