UDS Panel System
Made of a tough, lightweight composite, UnderDeck Shield panels are impact-resistant, weather-resistant, and easy to handle.
Description
Made of a tough, lightweight composite, UnderDeck Shield panels are impact-resistant, weather-resistant, and easy to handle. All our panels can be installed from above on new decks, or any deck without decking in place, or from below on elevated, existing decks.
Panel A is installed first, against the house.
Panel B is required for decks over 4 ft. in width, and are engineered to interlock with Panel A and Panel C.
Panel C is required for decks over 8 ft. in width, and are engineered to interlock with Panel B.
Specifications
| Color Options | Dove White, Black/White |
|---|---|
| Weight | 3.4 lbs | Dimensions | 47.5" x 33.5" |
| Thickness | .06 mil |
Delivery and return
Orders are typically processed within 3–5 business days (excluding weekends and holidays). Processing times may vary during high-volume periods.
Delivery times vary by location, but you’ll receive tracking details so you can follow your shipment every step of the way.
UnderDeck Shield products are final sale building materials and non-returnable once shipped.
Please review specifications and installation requirements prior to purchase.
Put water in its place™
Panel Label
Each panel is clearly marked for easy identification and installation sequencing.
The Pitch is in the Panel™
We take the worry and guesswork out of channeling water. Our integrated slope feature is engineered to get water moving and keep it moving away from your home's foundation.
Sequential Panel Design
Our interlocking panels are easy to handle and offer the industry's most DIY-friendly installation process.
Lightweight and Tough
Made of lightweight composite, our panels weigh just over 3 lbs, are weather-resistant and incredibly durable.
Screw Points
Dimples in the material indicate where to place fasteners for underside installation.
Extends the Life of Your Deck
When installed from above, UnderDeck Shield panels cover your structural joists, reducing exposure to the elements and ultimately extending the life of your deck.
Integrated Slope Technology
Our panels feature a built-in slope that eliminates guesswork, automatically channeling water away from your foundation to ensure your new living area stays bone-dry even during heavy downpours.
Easy Installation
Designed for homeowners, these lightweight panels interlock easily with a cordless drill. Pre-marked fastener dimples and an intuitive design make professional-grade results achievable for any skill level.
Versatile Mounting Options
Install from the topside on new builds to protect structural joists, or mount from the underside of existing elevated decks. It is the perfect solution for any deck configuration.
All-Weather Durability
Made in the USA from heavy-duty composite, these panels withstand sub-zero freezes and triple-digit heat. They won’t crack or warp, ensuring your outdoor investment lasts for years to come.
Instant Finished Look
Hide unsightly beams with a clean, polished ceiling. This system prevents soggy furniture and muddy puddles, creating a fresh, sophisticated space perfect for entertaining or quiet relaxation.
We'll Help with the Math
With a couple of simple measurements, the UnderDeck Shield Calculator will estimate what you need to get your deck in check. Grab a tape measure, and let’s get started.
Topside Installation
If your deck is new or if you're in the process of getting new decking, a topside Installation is your best bet. A topside install delivers the added benefit of protecting your joists from moisture and extending the life of your deck.
Recommended for:
Any new deck
Any deck without decking in place
IMPORTANT: UnderDeck Shield panels are engineered specifically for decks supported by joists 16” on center.
Download Topside Installation Guide
UnderSide Installation
If your deck is existing and elevated, you’ll be employing the underside installation method. Very few underdeck products are capable of this… you’re in the right place!
Recommended for:
Elevated decks
Any deck with an accessible underside
IMPORTANT: UnderDeck Shield panels are engineered specifically for decks supported by joists 16” on center.
Shipping
Orders are typically processed within 3–5 business days (excluding weekends and holidays). Processing times may vary during high-volume periods.
UnderDeck Shield products may ship via:
- Standard parcel carriers
- Freight or LTL carriers, depending on order size
Available shipping options and costs will be displayed at checkout.
See the UnderDeck Shield Shipping Policy for full details.
Returns
By placing this order, you acknowledge that UnderDeck Shield products are final sale items and confirm you have reviewed product specifications, installation instructions, and our Return Policy.
See the UnderDeck Shield Return Policy for full details.
Cancellations
If you need to cancel your order, please contact us at support@underdeckshield.com within 48 hours of placing it. We’ll do our best to process your request; however, orders that have already been processed or shipped may not be eligible for cancellation. Approved refunds will be issued to the original form of payment.
Warranty
UnderDeck Shield is covered by a 3-Year Limited Warranty covering manufacturing defects including cracking, splitting, warping under normal conditions, and water leakage when properly installed.
The warranty applies only to the original purchaser and does not cover damage caused by:
- Improper installation
- Misuse or modification
- Weather events or external damage
- Normal wear and tear
See the UnderDeck Shield Warranty for full details.
Frequently Asked Questions
What type of decks does it work on?
Ground-level or elevated, new or existing, UnderDeck Shield is a solid solution for any deck with joists 16" on center.
How many panels will I need?
Spec your deck and determine the amount of panels you will need with the UDS Product Calculator.
What if my deck joists are not 16" on center?
UnderDeck Shield panels are engineered specifically for decks supported by joists 16” on center.
How much will it cost?
The average MSRP for the panels needed to be installed above or below a 12'X12' deck is right around $2,000, or ~$15/sq foot.
Got more questions? See All FAQs
Compatible on most Decks
UnderDeck Shield is compatible
with virtually every style of deck with joists 16" on center.
New or existing decks
Ground-level or elevated decks
Natural wood or composite
Effective Draining System
Patented design with integrated slope directs water away from your home’s foundation.
Creates dry, usable space
Protects foundation
Prevents joist rot
EASY INSTALLATION
Measure your deck, use our deck calculator to determine number of panels needed for installation.
Easy to install
DIY-friendly
Lightweight and easy to handle
DECORATIVE FINISH
Brings a finished look to the underside of every deck.
Shiplap hides green-treated lumber
Brightens and freshens appearance
Creates a more finished look
