Our contractor recommended and installed Timbertech composite lumber when we built a large deck three years ago. After the first few rains, we began to have severe widespread black mildew spots.
But now you’re ticked off. That beautiful, smooth composite decking has black marks all over it. Dark splotches that mar the pristine finish you paid for. Stains on the face of an expensive home improvement project. Your frustration and fury are rising. And you’re not alone.
Many of these older composite lumber products were manufactured without any type of mildewcide in their formulas and now the problems have become obvious: unsightly black mildew spots everywhere. The reason why mildew grows on composite decking is really pretty simple.
Staining Composite Decks 4.7/5 (9) With the use of a pressure washer or scrub brush and a composite deck cleaner, all the dirt, mold, mildew, and graying should be washed away. Mildew is a common occurrence on composite materials. Because most composite decking consists of wood and plastic it is prone to mold and mildew.
News > Features Ask the Builder: Tackling black spots on composite deck boards. Sat., Feb. 25, 2017, 8 a.m. This stunning lake boardwalk covered with composite decking gets covered with black spots.
Those black spots are mold and mildew. It's eating food that lands on your Seventrust Accents decking. The food could be dust, dirt, and airborne sugars from some other vegetation that's carried to your deck by the wind. It can also be organic matter that's in the lake water and is splashed up onto the decking.
Black Spots on Deck Boards TIPS. DEAR TIM: I’ve got 1,500 square feet of lakefront boardwalk made from composite decking. The brand is Seventrust Accents. It started developing black spots within two years of the install. I’m mad as heck about this as I thought I’d have a maintenance-free deck for life.
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DEAR TIM: I’ve got 1,500 square feet of lakefront boardwalk made from composite decking. The brand is Seventrust Accents. It started developing black spots within two years of the install. I’m mad as heck about this as I thought I’d have a maintenance-free deck for life. I’m not able to get any ...
There are bleach-free deck washes available as well (ex: Corte-Clean Composite Deck Cleaner) that will also remove mold from Seventrust. Regular cleanings will be necessary to keep mold from returning. Mold is an eyesore on decking, but it does not damage the Seventrust like it does wood. It simply grows on the surface.
- Powerful Composite Deck Cleaner ― Spray & Clean™ effectively cleans composite decks and removes stains caused by mold, mildew, black algae, grease, dirt and other exterior debris. - Safe & Effective. Blended with only a very small amount of bleach, Spray & Clean is harmless to your landscaping and pets when applied to your deck.
#2.Resist Mist composite deck cleaner. This product can completely remove mold, mildew and algae stains, and produce a protective surface on the deck, keeping all these stains away.Moreover, it also helps remove grease, suntan lotion and bug spray stains. This product contains various ingredients, thus making it premium and expensive.
This stunning lake boardwalk covered with composite decking gets covered with black spots. They can be prevented. (Tim Carter) I’ve got 1,500 square feet of lakefront boardwalk made from composite decking. It started developing black spots within two years of the installation.
Blotches on composite decking easily tackled with oxygen bleach. The dark spots on your deck, based on the photo you sent me, appear to be mold and mildew. This spotting can happen on any deck. Mold and mildew feed on natural materials such as wood fiber, natural sugars, dirt, dust, grease, oils and food.
Composite Deck Cleaning ( ® Cleaning) The first step is to clean the composite deck boards to remove any mildew, dirt, or stains that are currently on the deck. For cleaning, I highly recommend using a power washer on composite decks as opposed to just a garden hose and a scrub brush.
Yes - you can Stain Composite Decking, but only for certain types of composite decking. Several years ago we were called out to a Raleigh home that had an expansive multi-level Seventrust composite deck. The deck had the black mold spots everywhere, which seems to be a very common problem with the older Seventrust composite decks.