Dexerdry® Weatherproofing Insert – Flexible rolls

(2 customer reviews)

$ 4.50$ 540.00

Thermoplastic inserts placed between grooved deck boards to weatherproof the deck surface.

We highly recommend the BoWrench for tightening decking seams to create the best seal, which you can buy here: BoWrench (link)

Decking grooves are different sizes, so please select Dexerdry® size accordingly.

25-year limited warranty,

  • Azek, TimberTech
  • Clubhouse
  • Deckorators Eovations
  • Deckorators wood composites
  • Fiberon Paramount PVC
  • Fiberon wood composites
  • Wolf
  • 12 inch sample
  • 50 LF
  • 240 LF


Recommended tools:

Dexerdry® lets you select the decking you like, while efficiently installing your decking and dry-deck at the same time.

One large roll generally covers 100+ sq ft.

One small roll generally covers 20+ sq ft.

Decking will need to be fastened with face screws, and deck surface will need to be sloped.

See installation instructions here.

Framing and decking layout details here.

Router bit use and details here.


Usually ships same or next business day



Dexerdry is a manufacturer of thermoplastic inserts for weatherproofing your deck surface. The inserts are cleverly installed in the grooves of grooved decking, to provide a water-shedding system that allows for more utilization underneath the deck, and a cleaner deck surface above.

Additional information

Compatible decking

Azek, TimberTech, Clubhouse, Deckorators Eovations, Deckorators wood composites, Fiberon Paramount PVC, Fiberon wood composites, Wolf

Roll Length

12 inch sample, 50 LF, 240 LF

2 reviews for Dexerdry® Weatherproofing Insert – Flexible rolls

  1. pat-8208 (verified owner)

    Install it right, and it’ll work great. First time around, we didn’t use any tools to squeeze the boards together, and the gasket and boards didn’t have an even seal, but we wrenched it together and the seal is tight and even. The flexible roll version can be tightened much easier than the older version, since it’s not a hard spline, and it’s “squeezable”. The only reason I’m giving this one 4 stars is because we had to get super straight joists, and had to slope the deck to make sure it didn’t puddle. Also decided not to put a cedar ceiling in, since my edge seals un the underside of the deck weren’t great.

    Overall, works great for storing stuff, hanging out on the lawn furniture, and keeping the deck gaps clean

  2. Alex429 (verified owner)

    Mostly put this on our deck cause of tree debris and storage underneath. Bunches of pine needles used to always get stuck between the deck boards, and we don’t like seeing under our deck (where we store all the summer toys and tools). FYI make sure your joists are straight and flat or you’ll get puddles…

    Overall, makes the deck look smooth and “clean”. Will be doing this on the next deck we have

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