If you don't clean the underside, mold and mildew can build up and compromise the deck's integrity. You can clean the underside of the deck with a DIY cleaning solution, or a pressure washer. Cleaning ...
DEAR TIM: We put down Trex decking in 2008. The composite lumber has developed dark spots all over it. It started with a few spots and has multiplied over the two-year period. What is causing the ...
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