Dirty Patio After Winter? Here’s How to Clean and Refresh It Easily

Difficulty: Easy
Cost per sq ft = $0.02 to $0.95
Products: In stock
Delivery: Ready to ship anywhere in Canada
Alain Benoit (verified customer)

“Very good product, effective and easy to use. It even cleaned my house vinyl (in addition to the patio wood)!”

Winter is coming to an end and you see your patio emerging from under the snow. It may be dirty and have lost its charm. Don’t get discouraged—spring is the ideal time to clean your patio and refresh your stain!

We’ll give you all the tips to restore your patio’s in a few easy steps.

01

Clear Snow and Prepare Your Patio

Taking care of your patio starts with clearing snow in spring

As soon as the snow starts to melt, it’s the right time to take a look at your patio.

A simple action can make a real difference: remove the last layer of snow covering the boards

Why?
Because that snow is often the worst. It’s heavy, waterlogged, and full of contaminants accumulated during winter.

If you let it melt directly on the patio, all that water will penetrate the wood fibers. The contaminants too, and this can damage the stain, create spots, and accelerate wood deterioration.

By taking a few minutes to remove this wet snow, you limit water absorption and protect your wood stain. It’s not complicated and it’s effective. A small action in spring, for a patio that stays beautiful longer.

Before cleaning your patio, check the condition of the boards

Winter often leaves marks on wood. Between moisture, frost, and the weight of snow, some boards can deteriorate. If they were already unprotected, they may start to rot. In other cases, the wood can crack or even split under the weight of snow.

Before starting your patio maintenance, take a few minutes to inspect it. If some boards are too damaged, it’s better to replace them right away. This way you start with a solid foundation, and your maintenance will be more durable.

Also check the condition of the wood fibers. It’s normal to see small cracks appear over time. If they’re superficial, nothing to worry about. A simple stain refresh will be enough to protect the wood and even out the appearance.

However, if you notice larger cracks, around a quarter inch, it’s better to take action. In this case, using a wood filler is recommended to fill the openings.

Why is this important? Because these cracks quickly become entry points for water, dirt, and even insects. Over time, this accelerates the wood deterioration process.

By replacing or repairing damaged boards at the right time, you prevent the damage from worsening. You limit the damage and save yourself a lot of trouble in the long run!

02

Clean the Patio to Remove Contaminants

Once you have checked the condition of your boards and made the necessary repairs, you can move on to the next step: cleaning your patio.

This is an essential step if you want your stain to look great for as long as possible.

Why? Because dirt, mold, and contaminants that build up on the surface eventually penetrate the wood. Over time, it “eats away” at the finish and speeds up its deterioration. The longer you wait to clean, the more these contaminants become embedded and difficult to remove.

Ideally, you should clean it every spring. You remove everything that built up during fall and winter, and you start again with a clean surface. That way, your stain keeps a great look and your patio ages much better.

Choosing the right cleaner for your patio

If you want to wash your patio properly, do not use just any cleaner. You need a patio cleaner. Why? Because the boards accumulate much more than simple dirt: mold, contaminants (such as calcium), rust stains, graying
 A standard cleaner is not always enough to remove everything.

Sansin Multi-wash is designed specifically for this. It works deep into the surface to remove mold, dirt, and rust stains, while also helping to neutralize the graying caused by sun exposure and moisture. It also targets mildew and fungi that can develop over time
Another key advantage: you can adjust the dilution based on the condition of your patio. The dirtier the surface, the more you can use the product concentrated. Conversely, for lighter maintenance, you can dilute it more. This gives you better control over your cleaning.
Because the product is diluted, you use less each time. A single gallon can cover up to 2,400 sq ft, which is more than enough for most projects.
Do you want to avoid being left with a partial gallon and not knowing what to do with it? Multi-wash also works very well on concrete and exterior siding. You can therefore easily reuse it elsewhere around the house.

How to clean your patio step by step

Washing your patio starts with diluting the cleaner. Let’s look together at the different mixing ratios you can make with Multi-Wash:

For spring cleaning, a 12:1 dilution is generally sufficient. It is the right balance to remove contaminants without being too harsh on the wood.
  • Begin by preparing your mixture. Pour the Multi-wash into a plastic bucket, then add the amount of water according to the chosen ratio. If you are using a pressure washer, you can also mix it directly in the tank.
  • If you are working in direct sunlight, take the time to lightly dampen your patio with a garden hose before applying the cleaner. This prevents the product from drying too quickly on the surface.
  • Then apply the solution to the boards. You can do this with a brush, a nylon scrub brush, or a pressure washer. If you choose the machine, be cautious: keep the pressure under 500 psi and keep the nozzle at least 12 inches from the wood. Too much pressure or too short a distance can damage the boards.
  • Let the product work for about 15 minutes. If you are working with a brush or scrub brush, use this time to scrub with a nylon brush, following the direction of the wood grain. This helps dislodge embedded dirt more deeply.
  • Pay attention to one important point: the cleaner must never dry on the surface. If necessary, lightly mist it or brush again to keep the cleaner active.
  • After 15 minutes, rinse thoroughly with clean water. Again, you can use the pressure washer, following the same precautions to avoid damaging the wood.
  • Once cleaning is complete, let your patio dry for about 24 hours.
Your patio is now clean and looking great, ready to receive a new coat of stain if needed.

03

When should I apply a maintenance coat on my patio?

As a general rule, you will want to maintain your patio finish proactively.
Typically, this means:
  • Every two years for a semi-transparent stain.
  • Every four years for an opaque stain.
But in reality, it is not just a matter of time. The condition of your patio remains the best indicator.
Some signs are clear:
  • If your stain has faded significantly or turned gray (especially with a semi-transparent stain).
  • If you see that the finish is peeling or worn down to bare wood.
In these cases, it is best to act right away.
Why? Because the longer you wait, the worse it gets. A weakened stain will continue to wear and peel, and you may end up having to sand everything the following year. In addition, as soon as the wood is exposed, it becomes vulnerable to rot and structural damage.
With a patio, it is simple: it is better to maintain a little earlier than too late.
That way, you avoid additional costs and, above all, extra effort at the next maintenance!

Start your project now!

You will find all the products you need directly on our website.

  1. Start by measuring your patio dimensions to determine how many gallons of Multi-Wash you need. As a guideline, one gallon covers 2,400 sq ft when diluted at 12:1 and about 400 sq ft when diluted at 2:1.
  2. Place your order online and choose between in-store pickup and home delivery. Delivery times are 1 to 3 business days for Multi-Wash!

Would you like to learn more about how to maintain your patio? Visit the Wood Treatment section of our blog for more professional tips and advice!

Products found in this article.

MicroBéton Cementitious Coating

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Finitec Surface Preparation

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Finitec Protective Sealer

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Q- My patio does not look very dirty. Can I skip the cleaning?

It is tempting, but it is not a good idea. Even without visible dirt, wood accumulates contaminants that affect stain performance. A light cleaning (with a gentler dilution) is often enough, but you should not avoid it entirely.

Q- How do I know whether I just need to clean or also re-stain?

After cleaning, assess the condition of the surface. If the color is still even and water beads slightly, your protection is still effective. However, if the stain has faded, turned gray, or worn down to bare wood, that is a clear sign that a maintenance coat is needed. Cleaning is precisely what reveals the wood’s true condition.

Q- Can I use a pressure washer without damaging my patio?

Yes, but with caution. Too much pressure or a nozzle that is too close can damage the wood fibers. This creates a rough, uneven surface that will not absorb stain well. Keep the pressure moderate (around 500 psi) and a distance of at least 12 inches. The goal is to clean, not to “strip” the wood.

Q- Why does my stain wear faster in certain areas?

This is normal. Areas more exposed to the sun, rain, or foot traffic will always wear out more quickly. Stairs, railings, and very sunny sections are often the first to show signs of wear.

Q- Do I really need to clean my patio every spring?

Yes, it is strongly recommended. Even if your patio seems clean, it accumulates dirt, contaminants, and often early mold growth over the winter. If you do not remove them, these residues will penetrate the wood and accelerate stain wear. Spring cleaning lets you start again with a sound surface.

Q- Can I clean my patio with just water?

No, water alone is not enough. It can remove surface dust, but it will not eliminate mold, stains, or contaminants embedded in the wood. For a proper cleaning, you need a suitable product.

Q- Why does my patio turn gray over time?

Graying is mainly caused by UV rays and wood oxidation. Over time, the surface loses its original color. A good cleaning with a suitable product can help correct this phenomenon to some extent and restore a more uniform appearance.

Q- How do I know if my cleaning was effective?

A well-cleaned patio has a more even color and a more “natural” look. There should no longer be any blackened areas, deposits, or visible residue. This is also when you can better assess the true condition of your stain and decide whether a maintenance coat is needed.

Q- At what temperature and when should I use Multi-Wash cleaner?

The best time to clean your patio is in the spring, as soon as temperatures are stable and above 10 °C.
Avoid working when it is too cold, because the product works less effectively and drying is slower. Conversely, in direct sunlight or high heat, the cleaner can dry too quickly, which reduces its effectiveness and can leave marks.
Ideally, choose a cloudy day or a time of day when the sun is less intense. This gives you better control over application and the product’s dwell time.

They Did It and Adopted It!

Great service and advice from Colobar.
Excellent product, easy to apply and professional results

Richard Clement(verified customer)

My garage urgently needed beautification, the products provided were up to expectations. I followed the advice and videos from the Colobar team. Impeccable work. Final result: A garage with Epoxy in basin form.
Thanks to the Colobar team for their availability and advice.

Omar Sebbar(verified customer)

Easy application, realistic coverage, no aggressive odor, no problems encountered during installation.

Louis Martin(verified customer)

easy to install and very nice finish thanks to the colobar team for the info with quick response

Yannick Gignac
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Frédéric Riopel

Author Frédéric Riopel

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