• Roofs with a pitch from 3° to vertical
• Both renovations and new buildings
• Installation on the roof boarding or incompatible support
• Transformation, installation in sheets up to 13 m long, mechanical crimping

• Roofs with a pitch from 3° to vertical
• Classes of internal humidity load: 1 to 4.
• Both renovation and new buildings.

VMZINC, the choices

Only “PLUS” type VMZINC with a specially protected underside:

• Natural VMZINC PLUS, QUARTZ-ZINC® PLUS, ANTHRA-ZINC® PLUS
  
• 0.7 mm thick.

Characteristics of this technique

• VMZINC is installed on the roof boarding
• A 40 mm* continuous air gap must be left clear beneath the roof boarding, on all the roof pitches.
• Continuous ventilation openings are made at the top and bottom.
• In order to keep the integrity of the roof, it is recommended to install a breather membrane on the cold side of the insulation and a vapour control layer adapted to the internal humidity load of the building, on the warm side of the insulation..

Structure

A choice of:

• Wood and panels that are not compatible with VMZINC (plywood) must be certified for roofing application and at least 12 mm thick.
  
• Upper wooden panels must be certified for roofing application and
  at least 12 mm thick.
• Cellular concrete (special fastenings).
• Bituminous roofing.
• In case of refurbishment the quality of the substrate should be checked first.
• Maximum difference in height of
  1 mm between roof boards. The deflection measured under a rigid
  600 mm long straight edge cannot exceed 2 mm in all directions.
• The roof board nails are countersunk in order to avoid any contact with the VM ZINC® PLUS.