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Moss Removal from Concrete

By Chris Sullivan – ChemSystems, Inc.

Question:

I have concrete pavers and bricks in my backyard. The problem is I am getting moss growth on them. I power washed the moss away last year, but it's back again this year. Do you know what's causing this to happen?

Answer:

Bricks and concrete pavers are very porous, like sponges. They hold moisture, and thus are great little incubators for all kinds of plant life, especially moss. My guess is you live in a warm and humid climate. You will need to apply a weed and grass killer to the moss and then aggressively power wash all the plant matter away once it dies. Let the pavers dry, and then seal them with a product designed for concrete pavers or brick. This should eliminate or at least greatly reduce the problem.It may take several coats of sealer to completely fill all the pores in the pavers.

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