Superior Water Diversion


When it comes to under deck waterproofing, DEK Drain® is leading the charge.

Our six system profiles meet various customer needs, and all are backed by a fully transferable limited lifetime warranty. That’s the best protection available anywhere.


The best part? DEK Drain® couldn’t be easier to install. Custom-cut panels match the dimensions of your deck perfectly and cut down on waste. And we always use fasteners – never goopy sealants.

What system fits your situation best?

  • TOPSIDE® – The ultimate in deck protection is installed between the deck boards and joists during home construction or repairs.
  • UNDERSIDE® – Created with existing decks in mind, panels can be attached to the bottom of joists or recessed inside the bay to accommodate a finished ceiling.
  • DOG EAR FLASHING® – Protect your deck’s frame from moisture-related damage without investing in a full under deck waterproofing

Better than plastic, better than metal – all DEK Drain® systems are fashioned using premium rubber membrane material for a watertight seal that withstands chilly temperatures.

Discover the difference of DEK Drain®. Transform your deck area today.

Call 866-335-3724 or Fill Out the Form Below


The product went in great and is performing as promised.Thank you for all your help and feedback on my first install. A great product with a great warranty. I will be a repeat customer as often as I am able.


Just wrapped up the job and I have some pictures I will send you as promised. We had some terrible weather down here last few weeks with little to no sunshine. I have an interesting story though for you. We got all the materail stapled down and it snowed over 4 inches one night (that’s a lot for us here in Louisiana) before we started the decking portion of the project. Even with all that weight, the staples held the material in place. I took a picture for you of the snow filled flush to the top of the panels as well. Got the boards down, it rained over a inch Monday and not a single leak. Everyone was very satisfied.


I recently installed your product for a client and they love it. I enjoyed installing it and it was profitable. Please send local leads my way.


Thanks for your understanding and assistance with my DEK Drain project. Your solution of adding 2″x2″ to extend the drop bracing worked perfectly. We are looking forward to spending time underneath our new dry deck! It’s quite beautiful. Everyone that sees it is amazed at how it is engineered and how great it looks!


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