ZipUP UnderDeck Main Rail
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Features a specially-designed channel to form a waterproof seal

Available in 12' or 16' lengths

Attach to Pitch Rails (sold separately)

Made of dense PVC

Easily install with standard 1 to 1-1/2" deck screws

For exterior or interior applications

Can be installed onto new or existing decks


The ZipUP UnderDeck Main Rail is a crucial component in creating an attractive, watertight underdecking system in your outdoor space. The Main Rail features a specially-designed channel which connects with the beadline built into ZipUP Panels to form a water and rainproof seal. Attaching directly to the Pitch Rails that are installed on your joists, Main Rails are attached with standard 1 to 1-1/2" long deck screws (sold separately). After determining how many ZipUP Panels are needed for your system by using the ZipUP UnderDeck calculator, simply subtract 1 to find the number of Main Rails needed.

ZipUP UnderDeck is a revolutionary system designed to transform the unused space underneath your elevated deck into a functional outdoor living area. Easy-to-install interlocking panels create a seamless, water diversion system between your deck and the area below. Whether you're looking to create an additional living area or enhance your existing outdoor space, ZipUP UnderDeck is the perfect solution for adding style, functionality, and value to your home.


Manufacturer ZipUP UnderDeck
Brand ZipUP UnderDeck
Material PVC
Package Quantity 1
Returnable Yes
Warranty Limited Lifetime

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