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VMZINC Standing Seam Cold Roofing - Vented Cold Roof System

Verified by manufacturer 24 days ago

Standing seam roof on open gap boarding (cold, vented)

VMZINC UK Variant:
Product certifications:
  • QA Certificate

    QA Certificate

    Certificate type

  • EPD

    EPD

    Certificate type

  • EPD

    EPD

    Certificate type

  • EPD

    EPD

    Certificate type

  • EPD

    EPD

    Certificate type

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

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BOS
 +44 (0)1992 921 300 Website

Application

Suitable for buildings in 1 to 4 humidity classes (dwellings with high occupancy, sport halls, etc) with pitches from 3° to the vertical (as well as soffits).

Description

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

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.

____________________________________________________________________________

Standing Seam Roof on plywood (cold, vented):

  • Vented cold roof system for buildings with humidity classes between 1 and 4 using VMZINC Plus on a plywood (non-compatible) substrate.
  • VMZINC PLUS is installed on the plywood. A minimum 50 mm continuous air gap must be left clear beneath the plywood. Continuous ventilation openings are made at the ridge and eaves at least 10 mm wide protected by insect mesh and correspond to BS 5250: 2002.
  •  VMZINC Membrane can be used between the VMZINC PLUS and the plywood, although this is optional but may have the advantage of protecting the plywood prior to the installation of the zinc. The ideal thickness of the plywood is 18 mm and it must be weather and boil proof. WBP plywood is more precisely described as EN 314-2 (bond class 2) and EN 636-2 (timber performance).
  • It is also recommended to install a vapour control layer on the warm side of the insulation.

Features and benefits:

  • Provides a continuous rigid deck for the VMZINC PLUS.
  • Plywood decking is readily available and widely used.
  • Excellent pull-out resistance.
  • BRE EN 15804 EPD.

System build-up:

  • Interior finish;
  • Vapour control layer;
  • Insulation;
  • VMZINC Membrane;
  • 50 mm ventilated air space (minimum);
  • Rafter;
  • Batten;
  • Plywood;
  • VMZINC PLUS Standing Seam.

VMZINC PLUS:

A product which allows zinc to be installed on ventilated plywood as well as specific warm (non-ventilated) substrates. The product consists of VMZINC (in all finishes) having a 60 µm coating applied to the underside thus allowing a more varied amount of substrates to be used and eliminating the risk of the formation of white rust on the underside of the zinc standing seam panels. VMZINC PLUS resists to an abrasion of 140 L when tested in accordance with ASTM D 968.

____________________________________________________________________________

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.

General information

Color

Blue

Green

Grey

Red

Brown

Finish

Natural

Pre-treated

Material

Zinc

Shape

Rectangle

Other

Length

13000 mm

Guidance for specification option:

Maximum panel length.

Bespoke

Guidance for specification option:

Overall system.

Width

430 mm

Guidance for specification option:

Panel centres.

530 mm

Guidance for specification option:

Panel centres.

600 mm

Guidance for specification option:

Panel centres.

Bespoke

Guidance for specification option:

Overall system.

Height

25 mm

Guidance for specification option:

Standing seam.

Warranty description

50 year

Guidance for specification option:

Up to 50 year material warranty available on a project basis.

Uniclass

Ss_30_40_50_95 Zinc sheet fully supported roof covering systemsPrimary

CAWS

H74/5 Zinc sheet fully supported covering to dormers

H74/150 Zinc sheet fully supported covering to dormers

H74/110 Zinc sheet fully supported roof covering

Product range

Roof Systems

Specification data - Zinc sheet fully supported roof covering systems

Classification data

System performance

Structural performance – wind actions
Design of zinc sheet fully supported roof covering systems
Durability
Aesthetic performance
Fire performance

System manufacturer

VMZINC UK.

Sarking or roof boarding

18 mm open gap softwood boards.

Guidance for specification option:

With 50 mm minimum vented cavity, 10 mm open air inlet at the eave and 10 mm open air outlet at the ridge. 50 mm cavity created with a batten.


Membrane

VMZINC Membrane.

Guidance for specification option:

Placed over insulation, VMZINC applied directly over open gap softwood boards.

Insulation

As required.

Air and vapour control layer

Guidance for specification option:

A VCL is recommended and should be installed on the warm side of the insulation.

Insert requirements or omit.

Carrier

Batten (rafters can be metal or timber).

Substrate

Not applicable.

Sheet underlay

-

Fasteners

Screws as required.

Zinc

Zinc-titanium-copper (VMZINC®), 0.7 mm thick.

Guidance for specification option:

Standard thickness.

Zinc-titanium-copper (VMZINC®), 0.8 mm thick.

Guidance for specification option:

Suitable for long panels or exposed sites, consult manufacturer for details.

Longitudinal joints

-

Form

Standing seam joints.

Fixing standing seam joints

VMZINC clips, 1.4301 (304) stainless steel. The thickness of the fixing clip is 0.5 mm. The sliding clips have a moving component, which is 0.4 mm thick, and a 70 mm long slot.

Fasteners to substrate

It is recommended that screws be used to secure the clips with three being used per sliding clip.
The use of nails offers significantly less resistance, but in the event of using nails, contractors are advised to use ring shank nails.

Cross joints

-

Form

Double lock welts.
Roof steps.

Eave details

-

Form

Dog tooth.
Swept eave on 'T' plate with water check.

Fixings

Fixed with cleats using a 6 mm rebate on the substrate.

Verge details

-

Form

Standing seam verge.

Fixing

-

Top edge

VMZINC stainless steel sliding clip.

Bottom edge

The eave should be fixed to a 'T' plate with water check which must be secured using cleats.

Ridge and hip details

-

Form

G3 ridge.
Traditional with upstand.

Fixings

Ridge clip G3.

Colour

Natural VMZINC®, natural finish.

Guidance for specification option:

Natural VMZINC® has a shiny metallic appearance when new and develops a patina over time. In facade applications, it may take ten years for the matt grey patina to form.

Standard PIGMENTO® BLUE.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

Standard PIGMENTO® GREEN.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

Standard PIGMENTO® BROWN.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

Standard PIGMENTO® RED.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

Standard PIGMENTO® GREY.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

PIGMENTO® STORM GREY.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

PIGMENTO® CHARCOAL GREY.

Guidance for specification option:

  • Pre-weathered finish.
  • Colouration of the zinc is achieved with a special pigment layer that enhances the qualities of the zinc without presenting a block colour.
  • Tested to EN 13523.
  • Provides an increased resilience. However in a severe non-rinsed marine environment (1 km from the sea), staining is still possible and therefore the material should not be used in this application.

QUARTZ-ZINC®.

Guidance for specification option:

  • Pre-weathered finish.
  • Offers an appearance and texture that does not change over time.
  • When QUARTZ-ZINC® is scratched, it will self heal. The grey tones of QUARTZ-ZINC® blend well with existing construction materials. QUARTZ-ZINC® is produced through a phosphatation of mill finish Natural zinc.
  • The darkness of the pre-weathered zinc is measured electronically using a Y figure where 0 is black and 100 is white. Acceptable tolerance of QUARTZ-ZINC®, Y = 22 to 25.

ANTHRA-ZINC®.

Guidance for specification option:

  • Pre-weathered finish.
  • With its visible grain it matches the colour of slate and blends well in combination with photovoltaic panels.
  • Produced through a phosphatation of mill finish Natural zinc.
  • Acceptable tolerance of ANTHRA-ZINC®, Y = 5 to 7. Due to the dark colour of ANTHRA-ZINC® it should be carefully considered before using on non-rinsed surfaces such as protected facades and soffits.
  • For rinsed surfaces in coastal environments ANTHRA-ZINC® STRAT should be considered.

AZENGAR®.

Guidance for specification option:

Pre-weathered finish.

Engraved zinc giving a product with a matt, heterogeneous and light aspect.

Can be used in the same fashion as other VMZINC® products for both roofs and facades.

Panel length

Guidance for specification option:

Insert requirements, maximum length 13 m.

Manufacturer guidance

Note that longer panels may be recommended to be formed in narrower widths, consult manufacturer for details.

Panel width

430 mm.
530 mm.
600 mm.

Guidance for specification option:

Not AZENGAR.

Custom design

Not required.
Required.

Guidance for specification option:

Consult manufacturer for options and insert requirements.

Options include perforated, curved and stamped panels.

Standard

To EN 15804, ISO 14001 and ISO 9001.

Panel weight

6 kg/m² (approximately).

Reaction to fire

Fire classification according to EN 13501-1:2002:
A1 (Natural Zinc/ QUARTZ ZINC/ ANTHRA-ZINC/ AZENGAR);
A2-s1,d0 (PIGMENTO and VMZINC).

Slope

Minimum 3%.

Sustainability data

Contains Red List materials

No

Country of material origin

France

Country of product manufacture

France

Material

Zinc

Recyclability

100%

Guidance for specification option:

Fully recyclable. 

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

20 %

Guidance for specification option:

20% (approximately).

Expected Life

100 year

Product certifications

BIM objects

BOS

NBS BIM Object Standard

This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.

Find out more about the NBS BIM Object Standard.

Platform Compatible Version
IFC

IFC2X3

1

Revit

Revit 2016

2

Product certifications

QA Certificate

QA Certificate

BROOF t4 Standing Seam on Plywood Vented

EPD

EPD

EPD for QUARTZ-ZINC and ANTHRA-ZINC

EPD

EPD

EPD for PIGMENTO

EPD

EPD

EPD for Natural Zinc

EPD

EPD

EPD for engraved AZENGAR

Literature

VMZINC Standing Seam Installation Guide - Information about the Use and Detailing of VMZINC May 2022

VMZINC Standing Seam Installation Guide - Information about the Use and Detailing of VMZINC May 2022

VMZINC Roofing + Rainwater Design Specification & Installation Guidelines Dec 20

VMZINC Roofing + Rainwater Design Specification & Installation Guidelines Dec 20

VMZINC General Technical Recommendations - Design Guidance for Architects & Contractors.

VMZINC General Technical Recommendations - Design Guidance for Architects & Contractors.

VMZINC EN15804 Natural Rolled Zinc

VMZINC EN15804 Natural Rolled Zinc

ISO 9001

ISO 9001

ISO 14001

ISO 14001

EN15804 Pre-Weathered QUARTZ PLUS & ANTHRA PLUS

EN15804 Pre-Weathered QUARTZ PLUS & ANTHRA PLUS

BRE Certification EN15804 Pre-Weathered Rolled QUARTZ & ANTHRA

BRE Certification EN15804 Pre-Weathered Rolled QUARTZ & ANTHRA

BRE Certification EN15804 Pre-Weathered PIGMENTO & STRAT

BRE Certification EN15804 Pre-Weathered PIGMENTO & STRAT

CPD materials

Zinc as a Building Envelope

Zinc as a Building Envelope

Case studies

Driftwood, Salcombe, Devon

Driftwood, Salcombe, Devon

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