UnderDeck Shield

Create dry, usable space

UnderDeck Shield Drainage System

Put water in its place™

With an UnderDeck Shield drainage system you can turn wet, unusable space into dry storage or even additional living space. It’s a quick and easy way to get more out of your deck with joists 16" on center.

UnderDeck Shield is compatible with virtually every style of deck. Whether you install from above on a new deck, or from below on an existing elevated deck, you'll be protecting your home from water and adding dry, functional space.

Let it rain

With an UnderDeck Shield system, the underside of your deck is always dry and accessible, even when the topside isn’t. No more soggy cushions or muddy puddles… it’s like adding an additional room for entertaining or just quietly watching the rain.

Before

Outdoor patio with furniture getting wet during rain.

After

STEP A

Panel A is placed closest to the house

Step B

Panel B is then placed under
the end of Panel A

Step C

Panel C is then placed under
the end of Panel B

Diagram showing the interlocking system for panels A, B, and C with text explaining the process.

Diagram depicting the interlocking A–B–C system with labeled panels.

It’s your space… make the most of it

UnderDeck Shield brings a fresh, finished look to the underside of every deck and diverts water away from your home’s foundation. Its innovative design allows for simple installation on new or existing decks, ground-level decks or elevated decks. See how it works:

Person installing UnderDeck Shield panels on the topside of a deck

Lightweight and easy to handle

UnderDeck Shield panels are made of a lightweight and durable composite. They’re easy to handle, but stand up to everything Mother Nature can throw at them… from sub-zero deep freezes to 3-digit heat waves.

how to install