VMZINC Standing Seam Roofing - Standing Seam Roof On Open Gap Boarding (Cold, Vented)

Vented cold roof system for buildings with humidity classes between 1 and 4 using VMZINC on an open gap softwood boarding (compatible) substrate.

A minimum 50 mm continuous air gap must be left clear beneath the roof boarding. Continuous ventilation openings are made at the ridge and eaves. In order to maintain the integrity of the roof, a VMZINC breather membrane should be installed on the cold side of the insulation, and a vapour control layer appropriate to the building’s humidity levels laid on the warm side of the insulation.

VMZINC must be installed directly over the open-gap softwood boarding without the use of any membrane. The boarding should be clean and dry, 100–150 mm wide, 18 or 24 mm thick, according to the rafter centres.

The roof boards are fixed perpendicularly to the direction of the pitch leaving a 3–5 mm gap between them. They are securely fixed to the structure.

Features and benefits:

• A very versatile and easy to install substrate.
• Flexible because it also permits complex shapes to be clad in zinc.
• Excellent pull-out resistance.
• Easy installation using traditional clips.
• BRE EN 15804 EPD.

System build-up:

• Interior finish.
• Vapour control layer.
• Insulation.
• VMZINC Membrane.
• 50 mm ventilated air space (minimum).
• Rafter.
• Batten.
• Open-gap timber boarding.
• VMZINC Standing Seam.

Life Cycle Analysis (LCA):

VMZINC undertakes Life Cycle Analysis (LCA) tests on its products and publishes Environmental Product Declarations (EPDs), such as BRE Environmental Profiles. These provide users with comprehensive, reliable and transparent information on relevant environmental characteristics. The information is also used by VMZINC as the basis for its eco-design approach.