If you've been searching for the best under-deck drainage system that you can easily install yourself without hiring an expensive contractor, you are in the right place.
“I finished the install myself without any help. It took roughly 30 minutes per section working solo... Overall, I'm very pleased with the result.”
Every time it rains, water drops down through your deck boards, bringing along tree debris, mud, and organic items. It ruins your lower backyard layout and damages porch choices over time.
When it rains, water trickles right through your wood deck boards. This leaves the area below muddy, damp, and prone to rot.
Our system is the ultimate under deck water diversion solution designed specifically for the everyday homeowner.
Dripping, dirty rain water ruining your outdoor plans.
Rusting patio furniture and muddy ground.
Potential moisture damage and wood rot to joists.
Expensive contractor quotes ranging in the thousands.
A completely dry below deck system ready for use.
A clean, protected space for relaxing and entertaining.
Engineered water control that extends deck life.
An affordable, easy-to-install DIY deck drain kit.
Underdeck Umbrella gives you a dry, usable space beneath your deck without the cost and disruption of a major renovation.
Yes—you can. We spent years developing Underdeck Umbrella to make installation as simple and straightforward as possible.
“Was pretty simple to install, my wife and I did it. Drainage has been good, even during heavier rain, and the space stays much cleaner than before.”
“I can’t believe this type of solution hasn’t been around before. The under area of my deck is completely dry. I highly recommend it!”
“An affordable way to make my underdeck a dry and usable space. The videos were also helpful during installation.”
“The instructions were easy to follow and it was easier to install than I thought. Now I have a nice dry storage place!”
“Created a dry space under my deck that I never knew I needed, and now I can store items that were cluttering up my garage.”
Protect storage, outdoor furniture, and the area below your deck with a simple system you can install yourself.
Designed to be easily installed by one or two homeowners over a single weekend.
Covered by our comprehensive 3-Year Warranty.
Spend less on the kit, spend $0 on contractors, and get FREE shipping on orders over $600!
Turn the space beneath your deck into a dry, usable outdoor living area with the Underdeck Umbrella DIY Drain System.
Simply select your deck size (or enter your measurements), and we'll provide the materials needed for a standard installation with 16" on-center joist spacing.
Every kit includes: patented rail system, waterproof drain material, clips, specialized tools, and detailed step-by-step instructions.
You'll need: drill, scissors, and tape measure.
Not sure what size to order or need wider material? Contact us and we'll help you choose the right kit for your deck or customize it for you.
No, but you can hire your own local handyman that can follow our easy-to-install instructions.
Underdeck Umbrella was developed because other systems were labor intensive and require a lot of tools, time, and skills. Some even required the removal of your deck boards. We spent 5 years working to simplify the installation process down to 2 steps. All you need to do is install the rails and clip in the drain material. We ship everything to you in a few manageable size boxes and provide an installation kit with specialized tools to make the installation easier and faster. The only tools you will need to provide are a drill and scissors. Because our rails are self-sealing, no calking is required and our patented clip system allows the drain panels to be easily installed, cleaned, repaired or replaced.
Underdeck Umbrella is compatible with most decks. For a rapid assessment, text or email us a picture of the underside of your deck and we can verify whether Underdeck Umbrella will work for you.
A 250-square-foot deck will take about 5–6 hours to install.
The Underdeck Umbrella drain system comes with a 3-year warranty.
Yes. You can only see the drain system when standing under the deck. The gutter is mounted below the joists but is usually located on the inside of the header, making it less noticeable.
If the installation instructions are followed accurately, the areas where Underdeck Umbrella is installed should remain dry.
No. Underdeck Umbrella is a drain system. Products that provide a finished ceiling appearance are available, but typically cost about 3–4 times as much as Underdeck Umbrella.
Enter your measurements in the ordering calculator above to receive a real-time estimate.
We use cost-effective materials and developed an efficient DIY installation system. The rail-and-clip system securely holds the tear-resistant synthetic drain fabric while keeping installation straightforward.
Yes. The clip system allows the drain material to be easily unclipped for cleaning and clipped back into place without tools.
Absolutely. The flexible, tear-resistant, breathable membrane is supplied on a roll, so it can be cut to the exact length needed. Its clip installation makes damaged sections quick and simple to replace without tools.
Returns accepted only on unused, unopened, standard material within 30 days of delivery.
Custom-cut, cut-to-length, used, installed, damaged, or modified material is not returnable.
The customer is responsible for return shipping unless the item arrived damaged or incorrect.
Original shipping charges are non-refundable.
Refunds are issued after the returned material is inspected.
Orders should be checked before cutting or installing.
Any damage or order issues must be reported within 14 days after delivery.
Thank you for ordering from UnderDeck Umbrella. Please review our shipping policy before placing your order.
