As its name suggests DELTA GEO-DRAIN Quattro from Delta Membrane Systems is a compact four-ply drainage sheet that offers high levels of reliability for thick viscoplastic coatings. Even if driving rain is able to penetrate through an imperfectly installed upper edge trim, Quattro stands guard to ensure the ingress goes no further.
In an absolutely watertight system, rainwater would exert hydrostatic pressure on the waterproof coating. However, the micro-perforated slip film which – along with the additional filter cloth – acts as a backup drainage layer behind the dimpled sheet. This ensures any water is safely drained off.
The slip film has the added benefit of preventing the transmission of movement to the waterproof coating.
Installation is simple and straightforward. Supplied in roll-form, DELTA GEO-DRAIN Quattro is applied to the waterproofed surface without any need for special grade backfill.
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.
Fused to the high-density polyethylene dimpled sheet, the polypropylene geotextile filter cloth reliably keeps the dimple structure from clogging.
It has the added benefit of effectively draining off methane and radon gases.
Standard roll size for the Quattro is 12.5m x 2m, 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 retro-fit 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.
The product is also widely specified for new-build work where dampness could be a problem owing to the adjoining land or climate conditions.
Durability is a key feature of DELTA GEO-DRAIN Quattro. It will work effectively for at least 25 years in natural soil having a pH value between 4 and 9, and a soil temperature of up to 25OC.
DELTA GEO-DRAIN Quattro is just one example from an extensive product range offered by Delta Membrane Systems to help ensure damp will not penetrate into a living space.