Delta-NP Drain protection and drainage system
Product catalogue
High drainage capacity through specially-configured dimples is offered by Delta Membrane Systems with its Delta-NP Drain – a compact two-ply composite sheet that keeps its shape perfectly, even under high pressure.
Suitable for vertical and horizontal applications, this product promotes constant water drainage, and offers rot resistance and cost-effective installation.
The dimple part of the sheet gives a high compressive strength of about 150kN/m2, and gives dependable vertical and horizontal drainage in civil engineering applications, retaining walls of all kinds, open tunnels and underground parking lots.
Bonded to the dimpled sheet is a geotextile layer which filters out fine soil particles – ensuring a constant flow of water to the drainage.
CI/SfB subheadings under which this document is classified:
The product information is supplied by NBS Plus which is a library of building product manufacturer information linked to NBS clauses and clause guidance.
The following products are related to this document:
Delta®-NP-Drain
A high density polyethylene drainage sheet.

J40 Flexible sheet waterproofing/ damp proofing, Q37 Green roofs
Other downloads by this company
Select a download to view more details:
Product catalogue
Described as ‘the original’ waterproof membrane system, Delta-PT and Delta-Lath will insulate an...
Product catalogue
Designed specifically for the creation of wetrooms, Aquatecnic from Delta Membrane Systems featur...
Product catalogue
Capable of bringing climate control to office areas, without the need for air conditioning, Delta...