This includes all buildup than can accumulate between the boards. If the deck cannot drain properly, water can be left standing on top of the deck, promoting mold/mildew growth and eventually deck rot.
Allowing mold to grow untreated, even in the winter, can lead to significant deck damage. An OXYGEN bleach solution added to a common garden sprayer should be all that is needed to clean the mold. Mold likes to “root” deep into a porous surface. Always allow the OXYGEN bleach to sit so it can reach and clean these deeply embedded roots. At least 10-15 minutes should do the trick. For stubborn stains, scrubbing may be required. Remember, it is never recommended to use chlorine bleach on composite or natural wood decking.
After the deck has been cleaned and is completely dry, apply a moisture barrier. This is one of the most important steps in deck (composite or natural wood) maintenance that is often overlooked. This will not only prevent future mold growth, it will make all the difference on how your deck looks and performs in the future. You can easily apply a liquid mold barrier with a roller or garden sprayer. Expect to repeat this step annually depending on your climate.
Well, that’s it! Investing this small amount of time now BEFORE bad weather will ensure you’ll enjoy your deck long after summer has ended.
