Brick and pavered walkways and patios will eventually grow moss between them, especially in areas that don’t get a lot of sun. There are many ways to deal with this unsightly growth. I’ve tried a few. Naturally there is the power washer, but unless handled carefully, can cause more damage than good, plus you may have to re-apply the poly-sand that gets washed out. If you have excessive moss growth the power washer is the best way to get rid of it and start over with a clean slate. For yearly maintenance, I have tried salt. Yes, just plain white table salt poured directly onto the moss. It takes a little time, but it will kill it, plus there is the added benefit that it is eco friendly. Bleach mixed with water sprayed on the moss will also work, it has to be sprayed on and allowed to sit for a day or so before rinsing, but be careful because it can be slippery when wet. This year I am using a new product, Wet and Forget”. It is also sprayed directly onto the pavers. It will slowly turn the moss and/or algae brown and it will eventually break down the moss entirely avoiding picking out the unsightly brown moss usually left behind. As I mentioned earlier, if you have a serious condition, I would recommend power washing first, then any of the other treatments for yearly maintenance. If you’d like to try “Wet and Forget” just click on my post title and you will find a convenient link to the product.