UnderDeck Wall Trim by Zip-Up

UnderDeck Wall Trim by Zip-Up

DecksDirect Item #6401

UnderDeck Wall Trim by Zip-Up

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Starting at: $21.99

Price reflects options chosen above

The final product price may change based on the combination of size/type/finish/style you choose.

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Orders over $999 qualify.

Return this item for a full refund with no restocking fee. details

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 DIY Friendly   Popular Product   Innovative

Zip-Up Underdeck finishes the underside of your deck providing dry, usable outdoor living space... Learn More



Once the Zip-Up UnderDeck Pitch Rails are installed, the next step is to attach Wall Trim to the ledger board and the outside rim joists. The Wall Trim along the outside rim joists will follow the slope of the Pitch Rails in order to achieve the proper slope for the system. The Wall Trim is a 12 foot long, E-shaped piece with a channel into which you'll slide the end of the Panels. Along the rim joists, the entire edge of the Panel will slide into the Wall Trim.

All you need to fasten the Wall Trim is a standard deck screw approximately every 12 inches. At corners, the edges of the two pieces of Wall Trim can overlap, or you may choose to miter them.

To finish off the system at the open end where a gutter may or may not be installed, many users of Zip-Up UnderDeck choose to install Wall Trim upside-down along the edge of the Panels. The Wall Trim channel slides onto the exposed end of the Panels and can be secured with a bead of silicone adhesive.

Estimating materials:
Start here with our handy Zip-Up UnderDeck Calculator  

Add the lengths of all sides of the deck, then divide that number (in feet) by 12. If you are opting to install a gutter without using Wall Trim at the open end of the system, do not include the length of that end in your calculation.

Product Specifications

ColorsWhite and Beige
(Length x Height)
12 ft x 2 in
Pack SizeEach
Coverage EstimateSee description above
Included AccessoriesNone
WarrantyView Zip-Up UnderDeck Warranty Information

Additional Information

Additional Information

DecksDirect Item # 6401
Manufacturer Zip-Up UnderDeck

Zip-UP UnderDeck Installation Instructions & Warranty (5.90 MB) 


zip-up logo

Zip-Up Underdeck finishes the underside of your deck providing dry, usable outdoor living space without sacrificing headroom or the beauty of your deck. It offers ease of installation and a washable, mold-resistant surface, while channeling any water from above to your gutter system


Zip-Up has many advantages including best-in-class rating for severe weather conditions, minimal tool requirement, low maintenance, and clean non-corrugated look that will complement almost any deck style.


Zip-Up beautifies and protects your outdoor living spaces in 5 easy steps with minimal tools, all available here at DecksDirect.com.


Features and Benefits
 DIY Friendly This brand is reliable and easy-to-install for professionals and DIYers alike.
 Popular Product This brand is a customer favorite whose products are among our best-sellers!
 Innovative This brand offers innovative products that have revolutionized the decking industry.

Zip-Up Resources:

Product Reviews & Questions:

3900 50th Ave N #100 Minneapolis, MN 55429
1-888-824-5316 sales@DecksDirect.com

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