3 Ways to Create Waterproof Dry Space Under a Deck

A dry storage room beneath an outdoor deck with screen porch and deck waterproofing system.

In This Article: Deck Membranes Under-Deck Ceilings Waterproofing Decking Flanges The spaces between decking boards on outdoor decks serve an important function—namely, drainage. They help to prevent puddles from forming and enable the surface to dry more quickly after rain and snowstorms. Along with routine waterproofing application, spacing between boards helps to prolong the useful […]