Fill the gaps in your flagstone with something clean an permanent:
perviousproducts.com/perkgrout/
PerkGrout is the best filler for gaps in flagstone and other hardscape surfaces. It is solid, long-lasting, and permeable.
PerkGrout How-to Video: vimeo.com/109409583
Learn about how you can get LEED™ credits.
www.perviousproducts.com/leed-credits-pervious-concrete/
Learn about how to prevent storm water runoff:
www.epa.gov/npdes
18 апр 2018