Deckit trex rain Escape Deck Drainage System, Deck Waterproofing Membrane， Rain Water Drainage Solution, 20MIL(0.5MM) HDPE Roll for 16" Joist Spacing, Outdoor Pergola & 2nd Floor Patio — Open-Box, 15% Off

Create a Dry Space Under Your Deck Turn wasted space into a clean, usable area. This under deck drainage system keeps rainwater away, prevents pooling, and keeps the space below your deck dry—even in heavy rain.

Heavy-Duty 20MIL Waterproof Membrane Made from thick 20MIL (0.5mm) HDPE, this deck waterproofing membrane resists tearing, UV, corrosion, and aging—built to last through all seasons.

Perfect Fit for 16" Joist Spacing Designed for standard 16" joist layouts, with no visible hardware. Creates a clean, professional finish without bulky or unsightly parts.

Fast 3-Step Installation – No Special Tools Install downspouts, lay the membrane, seal the joints. Easy to cut and customize for pergolas, patios, and elevated decks—DIY friendly.

Protect Your Deck & Reduce Maintenance Costs Prevents water damage, wood rot, and structural wear. Extend the life of your deck while minimizing long-term repair and maintenance expenses.

The Deckit system keeps your outdoor living areas dry in rainy weather with no excessive exposed parts. It’s an easy-to-install product that lets you effortlessly create stunning outdoor spaces. This universal under deck drainage system keeps the area beneath your deck dry, extends the deck’s service life and reduces maintenance costs—making it the perfect choice for creating an indoor-like environment under any deck.