Delta Geo-Drain Quattro is an external cavity drain membrane with four layers designed to be externally applied as a protective layer installed over a flexible waterproof coating such as Koster Deuxan 2C.
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Geo-Drain Quattro is a unique drainage protection system/external waterproofing membrane that works in conjunction with Type A External Waterproofing or can simply be used in civil engineering situations. Geo-Drain Quattro is a compact 4-layer membrane which can be used vertically and/or horizontally.
Geo-Drain Quattro offers maximum safety for thick viscoelastic coatings and a multitude of alternate Type A systems. This holds true even if driving rain can penetrate through an imperfectly installed upper edge trim. In a watertight system, such rainwater would exert hydrostatic pressure on the waterproof coating. However, the micro-perforated slip film which together with the additional filter cloth, acts as a backup drainage layer behind the dimpled sheet ensures that any water is drained off safely. In addition, the slip film prevents the transmission of movement to the waterproof coating.