The Service

Get Your Deck Ready for the Season

South Shore decks take a beating between humidity, winter moisture, and spring algae. By warm weather most decks have turned green, grey, or black with organic buildup.

I clean composite and Trex decks using the right method for each surface. Composite and Trex require a gentle low-pressure approach, blasting with a pressure washer can permanently damage the boards and void warranties.

The result is a clean, bright deck ready to use, without the damage from the wrong cleaning method.

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What's Included

✓Deck surface boards top to bottom
✓Stairs, risers, and step treads
✓Railings and balusters (wood or vinyl)
✓Posts and structural members
✓Ledger board and underneath overhang
✓Pre-soak and rinse to protect surrounding plants

Reviews

What Customers Say

★★★★★

"Jack showed up right on time. The deck came out looking brand new, all the old mildew gone, and my fence looks fresh and clean. Super reasonable price!"

M

Marjon T.

Google Review

★★★★★

"Jack was awesome. Detail oriented and did a great job cleaning my vinyl deck. Punctual and very polite."

K

Katie M.

Google Review

★★★★★

"My house, shed, and deck have never looked better! I highly recommend Jackson to anyone looking for pressure washing."

D

Denise P.

Google Review

Recent Work

Recent Deck Cleaning Projects in Marshfield, Weymouth & the South Shore

H2WOAH Exterior Cleaning provides deck cleaning for composite and Trex decks throughout Marshfield and the South Shore. These before and after projects show how professional exterior cleaning can remove algae, grime, and outdoor buildup while improving curb appeal.

After Trex deck cleaning in Marshfield MA by H2WOAH Exterior Cleaning showing clean composite decking

Before After Drag to Compare

Trex Deck Cleaning in Marshfield, MA

Grime, algae, and outdoor buildup removed from this Trex composite deck, refreshing the entire outdoor space.

After composite deck cleaning in Marshfield MA by H2WOAH Exterior Cleaning showing a brighter cleaner deck

Before After Drag to Compare

Composite Deck Cleaning in Marshfield, MA

Organic buildup and algae cleaned away from composite decking boards, helping restore a brighter appearance.

After beach house Trex deck cleaning in Marshfield MA by H2WOAH Exterior Cleaning showing a clean coastal deck

Before After Drag to Compare

Beach House Trex Deck Cleaning in Marshfield, MA

Outdoor buildup removed from a coastal composite/Trex deck, leaving a cleaner exterior for this Marshfield beach house.

After pool deck cleaning in Marshfield MA by H2WOAH Exterior Cleaning showing a cleaner refreshed pool deck

Before After Drag to Compare

Pool Deck Cleaning in Marshfield, MA

Algae, dirt, and outdoor buildup removed to refresh this pool deck area in Marshfield.

After dark wood deck cleaning in Marshfield MA by H2WOAH Exterior Cleaning

Before dark wood deck cleaning in Marshfield MA showing weathering and grime on deck boards

Before After Drag to Compare

Dark Wood Deck Wash in Marshfield, MA

Green algae and grime cleaned from composite deck boards, bringing back the rich dark brown finish.

After composite deck washing in Weymouth MA by H2WOAH Exterior Cleaning

Before deck washing in Weymouth MA showing green algae and grime on composite boards

Before After Drag to Compare

Composite Deck Washing in Weymouth, MA

Weathering and grime cleaned from this dark-stained wood deck, restoring a sharp appearance to stairs and deck surface.

View All Deck Cleaning Projects

Got Questions

Deck Cleaning FAQ

Can you clean composite or Trex decks?+

Yes, composite and Trex deck cleaning is one of our specialties. These boards look great but they need a very different approach than traditional wood. High-pressure washing can fuzz the surface, strip the protective cap layer, leave streak marks, and even void your manufacturer warranty. We use a low-pressure soft wash with deck-safe cleaning solutions that lift mold, mildew, pollen, and the gray buildup that makes composite decks look tired. Your boards come out brighter and the cap layer stays fully protected.

Will cleaning remove black and green stains?+

Green algae and surface mildew almost always come off completely — that's an easy win and the visual difference is dramatic. Deeper black staining, common on older pressure-treated wood that's been sitting wet for years, can be tougher because the discoloration is actually inside the wood grain. We can almost always lighten it significantly, and a brightening treatment can restore much of the original color. We'll take an honest look at your deck before we start and tell you exactly what kind of result to expect.

Should I clean my deck before staining?+

One hundred percent yes. Stain or sealer applied over a dirty deck won't bond properly, will look blotchy, and won't last anywhere near as long as it should. A professional cleaning removes dirt, mildew, old failing finish, and the gray oxidized layer on the wood, opening up the pores so new stain can penetrate evenly. After cleaning, we recommend letting your boards fully dry — usually 48 to 72 hours — before staining for the best long-term result.

How often should I clean my deck?+

For most South Shore decks, once a year is the right cadence — usually in spring before deck season really gets going. Decks that are heavily shaded, surrounded by trees, or close to the coast tend to grow algae and mildew faster, and those may benefit from a cleaning every six months. Regular cleaning isn't just cosmetic; it extends the life of your boards, helps preserve your stain or sealer, and keeps the deck safer to walk on by removing slippery organic buildup.

Deck Cleaning on the South Shore

See the H2WOAH Difference

Get Your Deck Ready for the Season

What's Included

What Customers Say

Recent Deck Cleaning Projects in Marshfield, Weymouth & the South Shore

Trex Deck Cleaning in Marshfield, MA

Composite Deck Cleaning in Marshfield, MA

Beach House Trex Deck Cleaning in Marshfield, MA

Pool Deck Cleaning in Marshfield, MA

Dark Wood Deck Wash in Marshfield, MA

Composite Deck Washing in Weymouth, MA

Deck Cleaning FAQ

Ready to Get Your Deck Looking Great?

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