Standing seam roofing panels on plywood bonded to phenolic foam is a roof system with a non-vented warm substrate. The plywood allows for a traditional support to be used. The plywood must be bonded to the phenolic foam in controlled factory conditions.


The substrate of the Metdeck/Warmdex composite panels (on the warm side of the roof panel) must be covered with Aludex Max a continuous aluminium foil-backed bituminous self-sealing vapour barrier.

Condensation risk must be assessed for each individual project or individual project component in accordance with BS 5250: 2002. Specification may need to be adapted to the internal humidity load of the building. The VMZINC Membrane should be installed between the VMZINC PLUS and the Metdeck/Warmdex composite panels, then dressed into the gutter.

Metdeck/Warmdex composite panels, incorporating 18mm WBP plywood factory-bonded to a Resol insulation core, are mechanically fixed to the substrate (vapour barrier on concrete, metal or timber deck). The number of fixings required will vary with specific building details and geographical location, and must be assessed on an individual basis.


Please find below files containing a selection of drawings. Further drawings are available upon request from your specification manager. Please note these drawings are only relevant for Ireland and UK market.

Areas of application

The system can be used for roofs with a pitch from 3º to 70º and for buildings with humidity classes of between 1 to 4 (dwellings with high occupancy, sport halls, etc). As with all warm (non-ventilated) roofs VMZINC PLUS must be used. This system provides a continuous 18mm WBP exterior grade plywood substrate allowing greater flexibility installing the VMZINC PLUS finish, thus eliminating the need to penetrate the insulation layer with additional fixings thereby minimising thermal bridging. With this warm roof system VMZINC PLUS Standing Seam can be installed on Metdeck/Warmdex composite panels without ventilating the underside of the VMZINC PLUS.


ZINC thickness0,70 mm
Panel width430, 530 or 600 mm
Panel length13000 mm
Product thickness (mm)U-value (W/m2K)
Product thickness = insulation + 18mm plywood
  • PIGMENTO Charcoal Blue
  • PIGMENTO Storm Grey
  • PIGMENTO Brown
  • PIGMENTO Green
  • Natural zinc

Documents and drawings

  • It is critical that the plywood bonded to phenolic insulation be installed dry and then must be protected against moisture before the zinc is installed.

Do you have a question or remark? Please, leave us a message.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.