A waterproof deck is a wooden deck that has been treated with a coating so that water does not seep into the wood. Having a waterproof deck means having a deck that is more likely to stand the test of time. When a deck is not treated, water will seep into the wood and cause rotting and erosion, which can cause the deck to fall apart over time. Making a deck waterproof or water-resistant is a fairly easy do-it-yourself weekend project.
A deck that is rotting can be dangerous; it can cause injury and is likely to attract insects. A simple way to prevent a deck from rotting and extend its life is by making it waterproof. The most common way to obtain a waterproof deck or porch is to apply a sealant on it. Homeowners should look specifically for a water-repellent sealer that works well with the type of wood the deck is made out of.
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To waterproof a wood deck, first it should be cleaned with a deck cleaning solution. This solution can be purchased at local hardware and home improvement stores. The manufacture's directions should be followed closely. Redwood and cedar wood require a special type of cleaner, so a product designed specifically for these types of wood should be used. A pressure washer can also be used, but if the pressure is too high, it can damage the wood.
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After cleaning, the wood should be allowed to dry thoroughly before the water-repelling sealant is painting on. A brush, roller, pump-up garden sprayer, or paint pad can be used to apply the sealant. Waterproof sealants come in a variety of tints and finishes.
The best sealant for a deck is one that will provide the desired look and that will work with the type of wood used on the deck. A homeowner should always check the label of the waterproofing product for an indication that it passes local standards for waterproofing; in the US, these standards are determined by the American Society for Testing and Materials (ASTM). Not all products labeled as waterproofers provide the same level of protection.
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If a deck or porch is made with the one of the newer composite-decking materials, it may have waterproofing properties built right in. There are a few different brands and types of composite decking, from vinyl to PVC. A homeowner should check with the product manufacturer to see if a waterproof sealant is needed.
To keep a waterproof deck looking beautiful for years to come, a new coat of sealant should be applied every few years. A good way to check if a deck is still water resistant is by using a "splash test." If water splashed onto the deck absorbs into the wood quickly, darkening the surface, then the wood is no longer resistant to water. On a waterproof deck, the water will sit on the surface, beading up, or run off.