Effective foundation protection for thick viscoplastic coatings is offered with Delta-Geo-Drain Quattro from Delta Membrane Systems – even if driving rain is able to penetrate through an imperfectly installed upper edge trim.

In an absolutely watertight system, such rainwater would exert hydrostatic pressure on the waterproof coating.

However, Quattro’s micro-perforated slip film which – together with the additional filter cloth – acts as a backup drainage layer behind the dimpled sheet to ensure that any water is drained off safely.

In addition, the slip film prevents the transmission of movement to the waterproof coating.

The laminated cloth – which sits between the film itself and the dimpled sheet – soaks up the moisture and then, in effect, acts as a wick to drain the moisture to the ground drainage.

The slip film plays a further role – it prevents the transmission of movement to the waterproof coating.

An integrated self-sealing edge ensures precise installation, and a specially design drainage/holding clip is also available to speed up the installation process and promote effective drainage.

It keeps water from accumulating between the thick coating and the slip film, effectively preventing the build-up of water pressure on the waterproof coating.

It has the added benefit of effectively draining off methane and radon gases.

Standard roll size is 12.5m x 2m for the Quattro, and it offers a compressive strength of some 400kN/m2.

Suitable applications for the sheet are wide and varied. With the growing popularity of creating basements in properties, Delta-Geo-Drain Quattro is well suited to retrofit and refurbishment applications.

It can also be used in a wide range of other domestic, commercial, industrial and retail applications, and is finding increasing popularity in the education and healthcare sectors where refurbishment of older properties necessitates effective damp proofing.