The Lift Pit Liner is a 1mm propylene/ethylene co-polymer geomembrane. Produced from a resin formulation designed to provide a premium quality geomembrane, which exhibits excellent flexibility, improved elasticity and resistance to puncture. These properties assure maximum multi-axial elongation to accommodate differential settlement. Polypropylene is ideal for geomembrane applications, and major benefits to installation are provided by a lower coefficient of thermal expansion and a wide temperature-welding window. Heat welding produces a homogenous membrane being totally impervious to water ingress. The product lends itself to applications where high/variable water tables, standing water and water creating hydrostatic pressure areas are in evidence.

Construction of Lift Pit Liner

The manufacturing of the lift pit liner commences when the length, width and height measurements have been obtained and signed off by contractor installing the product. The lift pit liner is heat welded together with a 50mm overlap joint running vertical in each corner, fusing the two membranes creating a homogenous material joint. Corners are reinforced with an addition layer of membrane. Around the topside of the lift pit liner a return flange of 150mm wide or greater dependant on request, is then joined to the D.P.M by contractor. The type of sealant/D.P.M jointing material required will depend upon type of D.P.M, and contractor should seek advice from the Corden technical helpline with regard to this issue.

Technical Information

Tested Property.	Test Method.	Min. Value.
Nominal Thickness (mm)	ASTM D5199	1.00
Density (g/cm³)	ASTM D792/1505 A	0.88
Elongation at Break %	G L 50mm	960
Tear Resistance (N)	ASTM D1004	55
Puncture Resistance (N)	ASTMD4833	150

Contact the Corden technical help line for typical installation details for this product, or specific issues relating to individual applications.

Typical Detail of Corden EPS Lift Pit Liner

1mm Polypropylene Lift Pit Liner
The Lift Pit Liner is a 1mm propylene/ethylene co-polymer geomembrane. Produced from a resin formulation designed to provide a premium quality geomembrane, which exhibits excellent flexibility, improved elasticity and resistance to puncture. These properties assure maximum multi-axial elongation to accommodate differential settlement. Polypropylene is ideal for geomembrane applications, and major benefits to installation are provided by a lower coefficient of thermal expansion and a wide temperature-welding window. Heat welding produces a homogenous membrane being totally impervious to water ingress. The product lends itself to applications where high/variable water tables, standing water and water creating hydrostatic pressure areas are in evidence.

Radon Membrane Barrier
Radon is a naturally occurring radioactive gas formed by the breakdown of uranium and radium. It is crucial that when gas protection is required, the site conditions, design and application are all taken into consideration to provide an impermeable membrane barrier, protecting the most valuable asset, “the building” against the gases that can cause future problems.

C02/Radon Membrane Barrier
Carbon Dioxide is a colourless, odourless gas formed as a by-product of decomposing organic matter. It is crucial that when gas protection is required, the site conditions, design and application are all taken into consideration to provide an impermeable membrane barrier, protecting the most valuable asset, “the building” against the gases that can cause future problems.

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