NBS Source
Flagon A


A single layer membrane of plasticized PVC manufactured by co-extrusion using plasticized polymers, resistant to hydrocarbons.

Flagon A is designed for use on ballasted roofs which are subject to pedestrian and vehicular traffic. Laps are homogeneously welded using hot air welding equipment.

The roof system consists of:

  • A lower protection layer of Flag Geotextile 500 g/m².
  • Vapour Flag vapour control layer.
  • EFYOS XPS 500 or EFYOS XPS 700 insulation.
  • Flat Geotextile 200 g/m² polypropylene sheet.
  • Flagon A waterproof membrane.
  • An upper protection layer of Flagon PeSL 0.8 mm anti-soaking layer.
  • Ballast of stone or paving slabs.

General information

Uniclass 2015

Pr_25_57_51_66 Polymeric membranesPrimary


J42/10 Warm deck roof covering

J42/110 Warm deck roof covering

J42/120 Inverted roof covering

J42/130 Cold deck roof covering

J42/400 Waterproof membrane

Product range

Single ply polymeric membranes

Specification data - Polymeric membranes

Product Reference

Flagon A


1.5 mm

1.8 mm

2.0 mm


Bar fixing system

Expansion fixing plugs for concrete substrates

Flag range of prefabricated corners, fittings and unions

Flagon PVC for detail work (Flagon S)

Flagon sheet metal laminated sections for flashings and cappings

Pre-drilled galvanized bar

Pressure plates for screws or plugs

Self-tapping screws and plates for metal/ timber substrates

Standard product features

Roll width:

2100 mm.

Roll length:

20 metres.


1.80 kg/m².

Tensile strength:

>17.5 N/mm².

Elongation to break:




Product Options


A wide range of accessories are available.

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