How to Keep a Composite Deck From Mildew
Mildew is a problem for any homeowner. It can grow in any damp location. It's a large enough problem indoors, but it is even more difficult to control outdoors, as conditions are both unpredictable and uncontrollable. Although composite decks are generally designed so that they don't absorb moisture, the constant wear of weather can cause composite deck materials to crack and become brittle, making them more susceptible to moisture. You will need to determine how much maintenance your deck needs based on the severity of the problem. Does this Spark an idea?
Things You'll Need
- Push broom
- Composite deck cleaner or detergent
- Scrub brush
- Bucket
- Paint roller
- Composite deck sealer
Instructions
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Mold Prevention
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1
Clear the deck of any items or debris. Use a push broom to clear away any remaining dirt or small debris.
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2
Apply a composite deck cleaner to the surface of the deck, according to the product's instructions. If budget is an issue, you can mix detergent into a bucket of warm water.
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3
Use a scrub brush to go over the surface again. Working with the cleaner, this should remove dirt and stains and help to kill mildew.
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4
Consider sealing the deck. If there are a number of cracks in the material, or if it seems that the deck absorbing a lot of water, sealing might be a good option. If you don't think your deck needs sealing, continue with regular cleaning to avoid mildew growth.
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5
Seal the deck if you decide that it is necessary. Use a sealer made specifically for composite decks.
Make sure your deck is entirely dry.
Stir the composite deck sealer thoroughly, then use a paint roller to apply a thin coat of sealer over a small section of the surface. Check for pooling. If the sealer pools, go over it again with the roller to even it out. Repeat this process until the entire surface of the wood has been covered, then allow the sealer to dry as indicated by the manufacturer's instructions.
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Tips & Warnings
Some cleaning products may require you to mix them with water. Make sure you read any instructions on individual products to avoid applying them incorrectly.
Sealing will not prevent mildew entirely. It helps to prevent moisture buildup, which is a cause of mildew. It is still a good idea to clean your deck regularly, even if you have a good seal on it.
