PVC decking + integrated drainage
Beautiful decking above.
More living below.
Make more of the space you already have. AmeriDex pairs cellular PVC decking with the Dexerdry seal to direct rain off your deck, helping create a drier space underneath.
For new decks and qualifying re-decks.
For contractors
Contractors: design decks and give homeowners instant pricing.
Start with your goal
What are you trying to do?
Pick the one that sounds most like you. We will point you to the right next step.
Keep the patio under my deck dry
See how sealed boards shed rain off the deck surface so the space below stays drier and usable.
Dry space under a deck HomeownersPlan a new deck
Bring the right questions to your builder, from size and drainage pitch to the color you love.
Open the planning checklist HomeownersReplace the boards on an old deck
AmeriDex works on qualifying re-decks once the old boards come off. See what your builder needs to check first.
Re-decking with AmeriDex HomeownersStop an upper deck from dripping
Compare the ways to keep the patio under a second-story deck dry, and what each one asks of the framing.
Second-story deck guide Builders and contractorsI build decks for a living
Installation details, system information, and the resources to spec AmeriDex on your next job.
Contractor resources Lumberyards and dealersI want to sell AmeriDex
Learn what it takes to stock the system and how our dealer team supports you.
Become a dealerNot sure where you fit? Call 800-217-9206 (Mon-Fri, 8am-5pm ET) and talk it through with our team, or send us a message.
How the system works
The difference is
between the boards.
Two components work together to make the deck surface itself the waterproof layer. See the connection before choosing your color, or read the full guide to waterproof decking.
Illustration of the connection, not an installation drawing.
A cellular PVC deck surface
Choose the color that complements your home, with a low-maintenance surface made for outdoor living.
A seal between the boards
The Dexerdry TPE seal fits between compatible board grooves as the decking is installed.
A planned path for rain
With the required pitch, flashing, and installation details, the assembly directs rain toward the deck edge.
Site conditions matter. Follow current installation instructions. Open sides can still admit wind-driven rain; this is not a fully enclosed, weatherproof room.
Think beyond the deck
Your favorite room
might be outside.
A place for long lunches. A shaded spot to unwind. Start with what you want to do underneath, then plan the deck above it.
Explore outdoor living inspirationDesign inspiration from the AmeriDex gallery.
Make it yours
Find your kind of beautiful.
Seven colors. One easy first step.
Select a board to explore its texture.
See it in
your own light.
Good projects start with good information
The AmeriDex
Learning Center.
Get to know the materials. Understand the system. Find practical ideas for the deck you want to build.
Newest Article Troubleshooting
Water Dripping Through Your Deck? Why It Happens and What Fixes It
Most decks are built to drain through their gaps, which is why the patio below gets soaked. What to check first, the quick fixes that backfire, and the options that actually keep the space under a deck dry.
Read the article
Materials explained
PVC or composite?
Start at the core.
Explore the materials behind the finished surface.
Explore the materialsThe connection that matters
Get to know
the Dexerdry seal.
Take a closer look at the board-and-seal assembly.
See how it connectsPLANNING GUIDE
From idea to a better plan
Before you build,
start here.
Bring the right questions to your next conversation with a builder.
Open the planning checklistLooking for professional resources?
Visit the contractor resource hubFrom idea to outdoor living
A clearer path to your project.
Picture your deck.
Explore layouts and colors in the AmeriDex 3D designer.
Open the 3D designer Opens in a new tab. PlanGet a starting number.
Use your dimensions to explore the material allowance. Confirm the complete scope in a written quote.
Explore costs ConnectFind your next step.
Check listed dealer coverage or connect with AmeriDex for sourcing help.
Find a dealerThe people behind the boards
Made in New Jersey by people who build.
AmeriDex started on a jobsite. Our co-founder John Ardolina is a carpenter by trade who spent years watching rain run through deck gaps and quietly rot the framing below. He built the Dexerdry seal to stop the water at the surface.
Co-founder Jim Murphy brings the manufacturing side. Our cellular PVC boards are made in Linden, New Jersey, and our team works out of Brick, New Jersey. When you call or write, you reach us directly.
Meet the team behind AmeriDex- Call us1-800-217-9206Mon-Fri, 8am-5pm ET
- Email ussales@ameridex.comWe reply within 1-2 business days
- Find us1129A Industrial Parkway
Brick, NJ 08724
Before you build
Good questions.
Clear answers.
Start here, then review the details with your builder.
See system details Installing Dexerdry? Get instant answers.Type an installation question and get an answer right away.Open install helpCan I use AmeriDex on an existing deck?
Yes, on a qualifying re-deck where the old boards are removed. Your builder must confirm framing condition, spacing, pitch, flashing, fastening, and the current installation requirements. It cannot be added beneath boards that stay in place.
Does it keep all rain out of the space below?
No system can promise that for an open-sided space. The correctly installed board-and-seal assembly sheds rain off the deck surface, so the area underneath stays much drier and usable. Wind-driven rain can still blow in from the open sides, and perimeter details matter. It is not a fully enclosed, weatherproof room.
How is it different from under-deck drainage?
AmeriDex integrates the drainage function at the deck surface. Other systems use a separate above-joist layer beneath the boards or collect water below the joists. Compare the three approaches to match the system to your project.
Is AmeriDex waterproof decking?
Yes, at the deck surface. The Dexerdry seal closes the gap between the boards, so a correctly installed deck sheds rain off the surface instead of letting it drip through. The area underneath stays much drier and usable, but it is open-sided, so wind-driven rain can still blow in from the sides. It is not a fully enclosed, weatherproof room. See how waterproof decking compares to membranes, aluminum planks, and coatings.
How much does AmeriDex cost?
AmeriDex is priced by the lineal foot of deck board, and that figure covers both the cellular PVC board and the Dexerdry seal, because together they are the drainage system. Use the cost guide calculator for a starting number, then ask for a written quote for exact figures.
Are the samples really free?
Yes. Pick the colors you want to see, choose a 6-inch or 12-inch sample, and we ship them to your door at no cost. Request your samples.
What warranty comes with it?
The integrated board and seal system carries a 25-Year Residential Limited and 10-Year Limited Commercial warranty. Read the warranty details and remember to register your warranty within 30 days.
Where is AmeriDex made?
Our cellular PVC deck boards are manufactured in Linden, New Jersey, and the Dexerdry seal is also produced in the USA. Our headquarters, sales, and warehouse are in Brick, New Jersey.
Where should I start?
Request physical color samples, sketch your deck dimensions, and ask for a project quote. Your written quote should confirm boards, seals, fasteners, accessories, delivery, and any installation costs.
Your next chapter starts outside
Let’s make room for more.
Start with a color you love. Build a plan from there.
Real people, Mon-Fri, 8am-5pm ET. No obligation.