--- product_id: 69517418 title: "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." brand: "goberco" price: "Β£102.43" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/69517418-under-deck-drainage-system-z-50-16-50-feet-long store_origin: GB region: United Kingdom --- # Self-Sealing Design 50 ft Length 30 Mil Thickness 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. **Brand:** goberco **Price:** Β£102.43 **Availability:** βœ… In Stock ## Summary > πŸš€ Elevate Your Deck Game with Goberco! ## Quick Answers - **What is this?** 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. by goberco - **How much does it cost?** Β£102.43 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/69517418-under-deck-drainage-system-z-50-16-50-feet-long) ## 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 - β€’ **Heavy-Duty Durability:** 30 mil thick lldpe ensures long-lasting performance. - β€’ **Smart Water Management:** Redirects water flow efficiently with no special downspouts needed. - β€’ **Cost-Effective Solution:** Material costs under $2/s.f. for maximum savings. - β€’ **Effortless Installation:** Easily staple on top of joists for a quick setup. - β€’ **Leak Prevention Mastery:** Innovative design reduces leaks at the ledger board. ## Overview The Under Deck Drainage System by Goberco is a robust 50-foot long roll designed for 16-inch joist spacing, featuring a heavy-duty 30 mil thick lldpe construction. This innovative system is easy to install, cost-effective, and engineered to keep your under-deck area dry while preventing leaks. With a self-sealing design and smart water management features, it’s the ultimate solution for any deck owner looking to enhance their outdoor space. ## Description Z/50/16 - Each roll is 50' long x 17 1/4'' width (for 16 in. joist spacing) x 30 mils thick - black astm heavy duty and durable polyethylene - top side is black, back side is Black - Easy to install and affordable: Goberco deck membrane + self-sealing tape + regular downspout total is under 2 $/s.f. - U.S. patent # 9,453,338 - unique Z-Fold/Channel allow membrane to act as flashing against house wall + 3.5'' deep valley between joists + a funnel to close the membrane against rim joist top. This means less risk of leaks at ledger board and at rim joist. Save time and money: no need of extra flashing and a piece of regular gutter downspout attach to membrane hole diverts water into the gutter so no need of expensive funnel. ## Features - On-top of joists installation - Keep framing and under deck area dry - Heavy Duty 30 mil thick black lldpe - Easy to install - 1. Staple on top of joists 2. Self sealing tape over joints 3. Screw downspouts to water evacuation holes. - Material cost under $ 2/s.f. (Goberco trough is about $1.2/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 inc. | | Part Number | 20130001 | | Item Weight | 11.88 pounds | | Item model number | 1725503016 | | Is Discontinued By Manufacturer | No | | Size | 50' long roll-for 16'' joist spacing-30 mil lldpe | | Color | Black | | Thickness | 0.75 Millimeters | | Item Package Quantity | 1 | | Outside Diameter | 10 Inches | | Cutting Diameter | 9.5 Inches | | Batteries Included? | No | | Batteries Required? | No | | Assembled Diameter | 9.5 Inches | ## Images ![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. - Image 1](https://m.media-amazon.com/images/I/61nn2CnCyYL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: how do you deal with water at the fashia end of the joist run? I do not see down spouts listed** A: At the end of the joist bay staple the membrane on top of rim joist then make a hole. Attach a piece of gutter downspout ( about 8'' long ) to this hole, make sure each downspout piece drops far enough into the gutter to prevent wind from pushing water off the gutter. Please see installation video on GOBERCO's website. **Q: How do you account for accumulation of leaves, pine needles & helicopters falling from trees?** A: I usually account them one at a time. But to wash them away i have placed a drain system that allows removal. Just cut 4inch holes in a line opposite joist. Then place gutter under holes. Use gutter downspout pipe to direct flow into gutter. Then when accumulation occurs wash down, then slide out downspout pieces leaves and helicopters fall out. Been working for me. **Q: Is this material non-combustible or a class b fire rated material? I need it to pass hfz code in riverside county ca** A: Hello, NFPA Flammability rating is 1 (Slight), please send us an email then we will forward you the spec date sheet. Thank you. **Q: How many joist will a 50 foot roll do** A: For example a 50' roll will cover 4 joist bay of 12' long ( 12 x 4 = 48 ). If your joist are 16' long a roll can make 3 joist bay ( 16 x 3 = 48 ). ## Frequently Bought Together - 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. - Deck Flash Barrier, 3-In. x 75-Ft. - RainEscape Deck Drainage System Downspout - Black --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/69517418-under-deck-drainage-system-z-50-16-50-feet-long](https://www.desertcart.co.uk/products/69517418-under-deck-drainage-system-z-50-16-50-feet-long) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-13*