How to remove stain from deck with pressure washer? This is it. Just a little care and you can do it yourself. Read on!

After years of deck installment, a darker layer of dirt and debris forms on the deck surface. This black residue layers up due to dirt and oil seeping into the wood over time thus damaging your deck and effects the looks of your home.

How To Remove Stain From Deck With Pressure Washer?

If you’re looking to remove those deck stains. You’ve come to the right place.


In this article, we’ve explained how these stains are formed. What are the different types of deck stains and how you’ll be able to remove stain from deck with pressure washer?

So keep on reading the article to know how to pressure wash the deck properly to remove stains. You will also know what should be kept in mind and what should be avoided during pressure washing your wooden deck.

Types of deck stains:

As explained earlier, it is common to experience deck stains over time. But these stains look unpleasant to the eyes. If you’re looking to spend summer nights or planning to hold parties in your outdoor space, the first thing you’ll want is to get rid of these stubborn stains.

Before knowing how to remove these stains we must know what types of stains we may face. Following are the most common stains that may appear on your wooden deck:

  • Mildew and mold stains
  • Rust stains
  • Algae stains
  • Stains by water damage

These stains occur in shady areas where sunlight can’t reach directly. The longer the leaves and wet items stay on the wood, the deeper the stains will seep into it.

Leaves and other dust particles will increase mold and mildew stains. Whereas outdoor furniture or wet items will cause rust stains n your wooden deck.

Why use pressure washers for removing stains?

Although there are multiple ways to pressure wash a deck properly and remove stains, mud, and other residues with less effort and scrubbing. We’ll recommend using pressure washers to do this cleaning. Pressure washing the deck is one of the best ways to get rid of deep stains without putting much effort and time.

All you have to do is follow a few tips, which we’ve mentioned below in the article and you’ll be able to pressure wash the deck stains efficiently.

Also Read: How Long Does It Take To Power Wash A Deck?

Are pressure washers safe for my deck?

Pressure washers use a high-power stream of water to clean the surfaces. They are designed to remove grime, stains, paint, and other persistent dirt and give clean fresh surfaces.

If you’re dealing with hard stains on your deck, pressure washing is the quick and easy option for the job. But also remember that several surfaces are fragile and can be damaged with high pressure so be careful and follow proper guidelines.

As far as decks are concerned, you can use pressure washers for clean-up. However, you’ll require to do it with the proper method. You have to handle the pressure washer properly to avoid any potential damage. Read further to know how to use a pressure washer on the deck.

How to Use a pressure washer to Clean deck?

  1. Before starting the actual procedure, make sure your surroundings are clear to pressure wash to avoid any kind of mishap.
  2. Clean the area from all the moveable furniture and items from the desk. Cover nearby plants or greenery from the deck.
  3. Dress as per guidelines given by the manufacturers of pressure washers. Wear full-sleeve clothes, protective boots, gloves, and glasses.
  4. Keep children and pets inside or away from the area.
  5. After clearing this checklist you can proceed to the actual work.
  • Step 1: Examine the wood type

First of all, check which type of wooden deck you are cleaning up. Whether it is softwood such as pine or cedar; or hardwood like oak or mahogany.

  • Step 2: Choose the right pressure washer

After determining the type of wood, you must use the right pressure washer for deck cleaning. If you’re dealing with softwood decks, a pressure washer with 1500 to 2500 PSI would be the best choice without damaging the soft surface of the deck.

In the case of hardwood decks, you can take the pressure washer up to 2500 PSI. Do not use high PSI pressure washers as they will more likely damage the deck surface rather than aid in removing stains.

  • Step 3: Adjust nozzle setting

Avoid using nozzles that spray direct extreme pressure. Rather use nozzles with wider angles such as 40˚ or 60˚. Or you can use a rotating nozzle to adjust the pressure by observing the performance of the washer.

Also Read: Which pressure washer nozzle for a deck?

  • Step 4: Keep the distance between the washer and deck surface

Keep the washer steady, and maintain the minimum distance of at least 12 inches between the washer and the wood. The nearer the washer will be, the higher pressure will be exerted on the surface and can destroy the surface.

  • Step 5: Clean in a sweeping motion

Do not spray pressure water in random motion. Instead, clean it in a sweeping motion and stroke the stains away from the deck. You can sweep along wood directions.

  • Step 6: Work in sections

To get rid of stains quickly and efficiently, clean them in small tiny sections. This will enable you to move forward quickly by ensuring the previous section is cleaned. This will also help you to avoid overlapping the cleaned and uncleaned areas.

  • Step 7: Allot adequate dry time

After cleaning all areas, let it dry properly to expose any stains left out. You can use a deck stain stripper to remove those remaining stains.

Things to avoid while pressure washing deck

  • Do not exert high pressure, and never bring the washer too close to the wood surface.
  • Avoid cleaners consisting of chlorine bleach. They can be culprits of discoloring, wood damage, or even increase the mild stains instead of cleansing them. 

Tips to consider before Pressure washing your deck:

  • Start pressure washing with the low-pressure nozzle at an insignificant or hideous area where little damage won’t hurt you and you can freely observe the performance of the pressure washer.
  • Right tools will do the job perfectly while wrong choices will increase the hassle. Therefore choose wisely the pressure washer and the nozzle tip.
  • Follow the wood grain and clean in a sweeping motion. You’ll save time and remove the hard stains in less time and effort. That’s how professionals do the task.
  • After pressure washing, sand the wooden deck to get a smooth wooden board. Let it dry completely before walking on the deck. The surface will be slippery after pressure washing.

How to prevent the deck from being dirty?

As a well-known phrase says “prevention is better than cure. Regular cleaning of the deck is easier than removing rigid stains. All you have to do is

  • Clean and remove dirt from the deck at least once a week.
  • Move the furniture and other items present on the deck occasionally and remove the dirt and rust collected under those areas.
  • Take out the dirt stuck within wood spaces with a bristle brush or a knife.
  • Let the wood dry after washing properly before putting back the furniture. Usually, it takes 24 to 48 hours.
  • Instead of chlorine-based cleansers use those cleansers that contain oxalic bleach.


All in all, there are a few things you need to do in order to remove stain from deck with pressure washer.

First, you need to identify the type of dirt and stains you’re dealing with.

Then, you need to select the right pressure washer nozzle and cleaning solution.

Finally, you need to follow our instructions carefully to make your deck look new again.

With a little elbow grease, you can have your deck looking like new in no time.

We hope now you have got all the answers you were looking for. We think you are all set to pressure wash the deck. All you need is patience and keen observance to keep things in control without any misfortunate. Thanks for reading and sharing!

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