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Further technical information such as composition and manufacture, size and weight, performance and sitework...

Composition and manufacture

Delta®-PT is a high-performance polyethylene membrane, extruded into a series of studs to create a continuous air gap behind the waterproof membrane. This results in a watertight, temperature- and chemical-resistant seal. The Delta®-Lath membrane has a mesh incorporated on the internal face, attached by a thermic welding process in manufacture. The welded mesh allows for direct render, plasters or DAB-fixed plasterboard for internal applications. Delta®-FM is specifically designed for floor applications. It is manufactured using high-performance, high-density polyethylene, with a low-stud profile allowing floor finishes to be applied, whilst also providing an air gap to achieve damp-pressure equalisation.

Size and weight

Delta®-Lath: stud height: 8mm; overlap detail: 100mm; roll sizes: 1,500 x 10,000mm. Direct rendering grade available in clear 2,000 x 20,000mm or 1,500 x 10,000mm.


Delta® membrane systems can be used externally as a waterproof support for rendered finishes, especially in exposed situations. Delta® render can also be applied to give a decorative finish which will not require painting.


Delta® systems are installed by a nationwide network of specialist contractors. Contact manufacturer for details.

Cleaning and maintenance

Delta® membrane systems are supplied with a 30 year product guarantee, covering the membrane and ancillary components. The Delta Membrane Systems range is certified to the requirements of BS EN ISO 9001.

Delta Membrane Systems

Delta Membrane Systems

Delta Membrane Systems Limited is the leading Type C Cavity Drain Membrane manufacturer in the United Kingdom being the UK arm of Dörken Gmbh & Co KG, the world's largest manufacturer of cavity drain membranes.

With over 125 years of...
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