Under Deck Drainage System -Z/50/16-50 ft. Long Roll, for 16 in.Joist Spacing, 30 Mil Thick Trough, Top Side is Black and Down Side is White.

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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 white – 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. Get extra storage under the deck, protect deck structure, get water, insects (termites, ants…), molds away from the house. Compatible with treated wood, cedar or composite wood. Thousands of roll sold across USA and Canada in the past 7 years, 20 years warranty (see website for details).
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

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