---
product_id: 340755395
title: "Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage"
brand: "goberco"
price: "A$64"
currency: AUD
in_stock: false
reviews_count: 5
url: https://www.desertcart.com.au/products/340755395-under-deck-drainage-system-z-50-12-50-long-roll
store_origin: AU
region: Australia
---

# Deep channel valley for superior water drainage 50' long roll for full coverage 30 mil thick heavy-duty polyethylene Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage

**Brand:** goberco
**Price:** A$64
**Availability:** ❌ Out of Stock

## Summary

> 💧 Keep it dry, keep it sleek — the ultimate under-deck upgrade!

## Quick Answers

- **What is this?** Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage by goberco
- **How much does it cost?** A$64 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/340755395-under-deck-drainage-system-z-50-12-50-long-roll)

## Best For

- goberco enthusiasts

## Why This Product

- Trusted goberco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Installation:** Staple on joists, seal joints, screw downspouts—done in minutes, no pro needed.
- • **Versatile Compatibility:** Works seamlessly with treated wood, cedar, or composite decks—upgrade any space.
- • **Cost-Effective Durability:** Premium materials at just $2/sq.ft. with 20-year warranty—invest smart, save big.
- • **Maximize Under-Deck Space:** Create dry, usable storage below your deck while protecting structure from water and pests.
- • **Patent-Protected Innovation:** U.S. patent #9,453,338 ensures unique Z-fold design for leak-proof performance.

## Overview

The Under Deck Drainage System Z/50/12 is a 50-foot long, 30 mil thick black polyethylene membrane designed for 12-inch joist spacing. Its patented Z-fold design channels water efficiently, preventing leaks and protecting your deck structure. Easy to install with staple, tape, and downspout, it offers a cost-effective solution to create dry, usable storage space beneath decks, compatible with various wood types and backed by a 20-year warranty.

## Description

Z/50/12 - Each roll is 50' long x 13 1/4'' width (for 12'' joist spacing) x 30 mils thick - black astm heavy duty polyethylene - top side black, back side gray or black - Easy to install and affordable: goberco deck membrane + tape + downspout is about $ 2/s.f. - U.S. patent # 9,453,338 z-folds allow this unique membrane to act as flashing + gutter between joists + funnel meaning less risk of leaks at ledger board and rim joist. - Save time and money: no need of extra flashing and funnel (simply use typical gutter downspout). - Compatible with treated wood, cedar or composite wood. - Get extra storage under the deck, protect deck structure, get water, insects (termites, ants...) off the deck. - Available for 5 years, sold thousands of roll across USA and Canada, 20 years warranty (see website for details).

Review: As good a system as the other company! - We are installing a replacement deck and wanted to keep the porch below dry so we looked for options. I found this system and am very happy with it. First, it will cost 1/3 of most other under deck drainage systems. Instead of $50 a rafter for parts, this will cost about 15 for a 10 foot deck. The price is for a 50 foot roll so you cut to fit from that. The system does not require an expensive collector at the end, simply cut an X into the material and screw on a downspout connector, I added some butyl tape for extra security and water proofing but that isn't really necessary. The material is a stiff plastic which has a drain down the center bent into the material. Staple in place with a drop down to the outlet end and bend the end upward into place, you are done. Great material and really fast shipping! It was shipped the next day from Canada and was at my place in 3 days from ordering. Good company, great shipping excellent product!
Review: Good, heavy duty product! Installation instructions could be better in my opinion. - Product seems.to be very durable. I would recommend as a 2 person installation. It may have been that I am a homeowner installing this and not a contractor. In my opinion, the installation directions were alittle lacking and could be improved on, but as stated before, the product I'm happy with, and would recommend.

## Features

- On-top of joists installation - keep framing and under deck area dry.
- Easy to install - 1. Staple on top of joists 2. Self sealing tape over joints 3. Screw downspouts to water evacuation holes.
- Material cost is about $ 2/s.f. (Goberco membrane is about $1.4/s.f., self sealing joist tape is about $0.4/s.f. , regular downspout + plastic gutter + roofing screws are low cost).
- Save Time / Reduce Leaks - Fold against house wall for flashing (reduce leaks at ledger board) - Deep channel valley between joists - Regular downspout redirect water flow into a gutter (prevent water dripping / no special downspout needed). U.S. patent # 9,453,338

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Goberco Building Products |
| Part number | 20130003 |
| Item Weight | 4.67 Kilograms |
| Product Dimensions | 25.4 x 25.4 x 35.56 cm; 4.67 kg |
| Item model number | 1725503016 |
| Size | 50' long roll-for 12'' joist spacing-30 mil lldpe |
| Color | Black |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage - Image 1](https://m.media-amazon.com/images/I/61f3hsW3zFL.jpg)
![Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage - Image 2](https://m.media-amazon.com/images/I/61vHZrmNzVL.jpg)
![Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage - Image 3](https://m.media-amazon.com/images/I/7125SPeElgL.jpg)
![Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage - Image 4](https://m.media-amazon.com/images/I/81Feln-tAeL.jpg)
![Under Deck Drainage System -Z/50/12-50' Long Roll, for 12'' Joist Spacing, 30 Mil Thick Black Trough, Create Dry Below Deck Storage - Image 5](https://m.media-amazon.com/images/I/715Xp3s7sDL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ As good a system as the other company!
*by G***Y on 25 July 2024*

We are installing a replacement deck and wanted to keep the porch below dry so we looked for options. I found this system and am very happy with it. First, it will cost 1/3 of most other under deck drainage systems. Instead of $50 a rafter for parts, this will cost about 15 for a 10 foot deck. The price is for a 50 foot roll so you cut to fit from that. The system does not require an expensive collector at the end, simply cut an X into the material and screw on a downspout connector, I added some butyl tape for extra security and water proofing but that isn't really necessary. The material is a stiff plastic which has a drain down the center bent into the material. Staple in place with a drop down to the outlet end and bend the end upward into place, you are done. Great material and really fast shipping! It was shipped the next day from Canada and was at my place in 3 days from ordering. Good company, great shipping excellent product!

### ⭐⭐⭐⭐ Good, heavy duty product! Installation instructions could be better in my opinion.
*by J***. on 26 December 2019*

Product seems.to be very durable. I would recommend as a 2 person installation. It may have been that I am a homeowner installing this and not a contractor. In my opinion, the installation directions were alittle lacking and could be improved on, but as stated before, the product I'm happy with, and would recommend.

### ⭐⭐⭐⭐⭐ Descent product
*by T***R on 15 October 2022*

Definitely use 4” tape (BLACK). Use longest staples your gun will staple. Cannot use compressed air stapler in my experience. Will significantly warp and twist in high temps during install. Try to have done in one day. On long runs (I did 16’) maybe not the best product. Mine is pooling in the middle. I cannot imagine running a 16’ elevated deck at a 2 degree downslope which would put constant tension on the house rim joist. Make sure to use lateral bracing if so. I’m no engineer, but…

## Frequently Bought Together

- Under Deck Drainage System -Z/50/12-50 feet Long Roll, for 12 inches Joist Spacing, 30 Mil Thick Black Trough Top Side, Down Site is White, Create Dry Below Deck Storage
- Under Deck Drainage System -Z/50/16-50 feet Long Roll, for 16 inches Joist Spacing, 30 Mil Thick Trough, top Side Black + Down Side White.
- E-SDS Joist Tape for Decking,1 5/8" X 50'*10 Roll Butyl Tape Deck Joist Flashing Tape Anticorrosive Waterproof Deck Tape

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-07-10*