Outdoor Surface Cleaning Blog

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When do I need to Seal my Deck?

Decks, like any part of your home, require maintenance to stay in the best shape possible. We are often asked questions about sealing your deck and how you know you are in need of it.

There isn’t a magic number that we can provide that can place your deck sealing on a normal schedule. Different materials and properties require it at different intervals. Here’s what to look for:


Peeling or Uneven color. Decks that are painted or have a color stain are easier to evaluate with respect to re-sealing your deck. When the color starts to chip and peel, that’s the first sign of needing another layer of protectant. You’ll notice this first and foremost on the most traveled areas of your structure.

Dry wood. When a deck has a more natural sealant or protectant, it can be harder to tell whether it needs upkeep. You can notice when the wood is drying out in two ways. First, if the wood is taking on a greyish color, it needs to be cleaned and sealed. This happens more often with decks that get a lot of direct sunlight. The other way to tell is if the wood is absorbing water. A properly protected deck should bead water instead of absorbing it into the surface.

Mold or fungus. The opposite of having a dried out deck is having one that gets too much moisture. Decks or fences that lie in shady, humid areas will begin to grow mold, fungi and mildew over time. When it isn’t efficiently dealt with, it can damage the wood.

Whenever you need to reseal your deck, you should have it cleaned first. The best way to ensure it is done effectively and doesn’t damage your structure is to hire a professional deck cleaning company. By cleaning the deck, you will be sure to get rid of all the mold, mildew and dead fibers before you lock them in with a layer of sealant.

When choosing a protectant or sealant, you’ll want something that blocks moisture and dirt from getting into the surface. Additionally, some protectants, like Renew Crew’s, block harmful UV rays from drying out your wood.

If you have any questions, please contact your local Renew Crew office.