The directions on the Mold Armor will tell you to try it in an inconspicuous place.
But it shouldn't be needed. Mold cannot eat the PVC decks or on the Composite decks that have a ''cap''. On an older style of the uncapped composite, it would be the way to go.
The purpose of the cap on the modern composite decks is to lower the maintenance costs and effort.
You basically need to wash the deck about twice a year... once to remove pollen, and once to remove fall residue (leaves, etc). That ''dirt'' trapped in the ''grain'' of a composite cap is what the mold/moss will try to eat.
While washing them down, the manufacturers suggest to be on the lookout for anything that may signal a future problem.
|