concrete paver problem

igneous

I have 16x16 concrete pavers for my patio. Each spring the joints and surface are filled with a mossy green substance. I pressure wash and use a chloirne solution, but this problem reoccurs each year. I installed the pavers on masonry sand (I realize my mistake), so the pavers are almost always damp. I was told to pressure wash and wait until they are as dry as they will get, and use a concrete sealer to help abate the moss. I do get plentiful sunshine for several hours so the pavers do dry during the good weather. I live in NC. Any thoughts on this?

Bud Cline

So your patio is on the north side of your house?

igneous

Yes... N x NE. The moss problem is definitely a winter issue. Very little sun and damp. Right now, it is drying as well as it is going to. The sand was free so I used it. I laid the pavers like blue stone (I'm from PA) rather than the proper method, so I have no one to blame. Will the sealer idea work, or will I end up with a bigger problem trapping moisture in the paver?

Bud Cline

I don't see how.

Chlorine is only a short term answer. It dilutes quickly and everything reverts back to nature. Why wouldn't you treat the area with a commercial vegetation killer of some kind? Some of those chemicals may give you a couple of years but eventually they-too will dissipate.