why should you put gravel under a deck home guides sf gate
weed control. leaving the area below your deck uncovered can allow weeds and other plants to sprout eventually pushing up between the deck boards. gravel installed over a layer of fabric or plastic sheeting helps keep weeds in check and prevents the plastic or fabric from blowing out of place. this type of installation can also prevent wildlife from burrowing into the ground and creating homes in the space beneath your deck.