Cleaning Wooden Deck Cracks?

How do you clean the cracks in your wooden deck? The boards on my deck are a little too close together and SO MUCH gunk gets stuck between them. I tried using a screw drivers to scrap it all out and I also used the high power nozzle on the end of the hose to shoot it out with water, but neither technique works all that well.


Any ideas?

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March 26, 20080 found this helpful

You might need to buy or rent an actual power washer to get them clean. Also, there is a product called "OxiOut Algae and Mold Remover" that can be applied with a sprayer or a brush. I know that Improvements catalog carries it for $17.99 for a 64oz bottle of powdered concentrate that makes 10 gallons of cleaner, but you can probablly find something similar elsewhere. Also, you can use a bleach solution to clean it (DO NOT mix with the commercial cleaner) and wash it off with the hose or you can actually use a bleach water solution in the pressure washer.

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March 26, 20080 found this helpful

How about pulling up the boards and installing them with wider gaps? That would be the proper fix. I did remove a bird feeder on my deck once because it loaded up the gaps too much.


BTW, too much high pressure washing will roughen the wood and make it splinter more easily.

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March 28, 20081 found this helpful

I would clean the cracks,as best as I could,with a garden hose and a stiff bristled brush-an old broom works well-You don't want cracks between the deck boards.[expansion/contraction pulls the nails loose]

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By Superna (Guest Post)
May 24, 20082 found this helpful

I haven't tried this myself yet, but have heard it works pretty well: screw a cuphook onto the tip of a wooden broom handle, use the hook to scrape the junk out from between the boards, then just sweep it up.

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July 10, 20180 found this helpful

I had the same problem. I used a putty knife.

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