gravel - heat absorbing, and hot probably a cost involved on going maintenance - weeds not ADA accessible mulch - free in most cases, get it in the fall or winter when leaves are gone for pure chips lay 4" think on card board sheets as large as you can find to prevent weeds volunteers needed to move the chips at least once a year paths should be added to ongoing maintenance - some weeds, fungus, acorns, adding of chips on high traveled pathways east to pull weeds out of mulch nice smell for only a short time turns color from oxidation (NOTE: be careful that persons with a challenged immune system or respitory problems should not move chips, or turn compost due to micro organisms and dust) not ADA accessible Decomposed granite / rock dust ADA accessible, compacts well for paths cost $35 - $75 per yard very low maintenance - some weeds in spring tire shreads can be free or at cost smell in some cases can be hot not ADA accessible bill
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