I have had pavers for about 10 years. Properly installed and 2 1/2 thick (not 1 1/2). Not sealed. Added sand after first year only. Probably not needed. Power wash every couple of years. Not sealed. Do get a little mold. Have some chemicals to get rid of mold but have not gotten around to applying. Do get a few weeds and spray those about once or twice a year when I go around the house and do the rest of the weeds. One cracked paver. Not replaced. Have a few dozen spear from the original insulation. I like a neighborhood of pavers for looks. Guess you will have a couple of hours of work a year on maintenance.
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