Goberco Deck Membrane is made of ASTM Linear Low Density Poly Ethylene (LLDPE) 30 mils ( 0.76 mm ) thick. LLDPE liners are the ideal choice for applications which require significant material flexibility, in addition to strength and durability. This raw material is used in the mining/civil industry for many years as pond liners, water reservoirs…

PLASTIC AS FLASHING:
Flashing at ledger board connections (see Page 13) shall be copper (with copper nails only), stainless steel, UV resistant plastic or galvanized steel with a G-185 coating. http://www.fairfaxcounty.gov/dpwes/publications/decks/details.pdf

UV RESISTANCE:
http://my.civil.queensu.ca/Research/Environmental/R-Kerry-Rowe/publications/documents/2011%20Islam%20Gross%20and%20Rowe%20GeoFrontiers%202065-2072.pdf

CONCLUSION
A review of the relative performance of exposed LLDPE and HDPE geomembranes has been presented in this paper. Based on laboratory accelerated aging test data, antioxidants in stabilized LLDPE geomembranes are expected to be depleted faster than those in stabilized HDPE geomembrane. However, LLDPE may age slower than HDPE after the antioxidants have been depleted from the polymers. Laboratory aging tests indicate that the service life of LLDPE (1.0-mm thick) and HDPE (1.5-mm thick) geomembranes exposed to Texas weather conditions is greater than 28 years. Both exposed LLDPE and HDPE geomembranes have shown to perform their intended function for more than 5 to 8 years in the field, the total durations of the field tests. Given the paucity of research relating to this important topic, more research is required.