Viking Roofspec WarmSpan System
Product Technical Statement: 106760
A full proprietary warm-roof-on-steel tray system.
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Level of assurance needed to demonstrate NZ Building Code Compliance
Supporting documentation should include technical information by manufacturer and either a BRANZ or independent Appraisal or CodeMark
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Viking Roofspec
confirms that this minimum level of assurance has been met or exceeded by the following:
BRANZ Appraisal 713 (2018)
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Technical Statement
Product Description
Viking WarmSpan is a full proprietary warm-roof-on-steel tray system comprising of: a wide-spanning steel deck (with an integral flashing system); Kingspan Polyisocyanurate rigid insulation panels adhered on top and any of Viking's sheet waterproofing membrane systems.
WarmSpan's simplicity removes unnecessary components to create the most cost-effective and energy-efficient warm roof system. It has an integrated vapour barrier and doesn't require a cover board for point-load resistance, seeing as Kingspan's thinnest polyiso (25mm) exceeds the minimum code requirement for an 'unrestricted access' roof (150kPa). For extra protection, a Viking walkway mat can be used. WarmSpan has:
- Highest possible fire rating - Group 1S from the ISO9705 'room test'
- Spanning ability - up to 3.6m between purlins
- Loading on a building reduced by 2/3 over timber
- No mechanical fasteners = no thermal bridging
- Wind uplift resistance - F.A.S.T. adhesive system rivals uplift of any fastener
Higher R-values are achieved with the polyiso providing greater energy efficiencies. The system's thermal performance helps achieve Green Star points for a building (see 'Environmental' section).
WarmSpan is the only NZ engineering-certified warm roof system. It has an integrated vapour barrier and it has been developed and tested to meet the wind and snow loadings specified within the building code.
Suitable for all residential, commercial and industrial projects, WarmSpan is classified as a low-slope roof, with a minimum pitch of 2 degrees.
Other features:
BRANZ Appraised No.713 (2018)
- Backed by a 20-year product warranty, and for specific projects, eligible for Viking's Full System Warranty, covering product and installation in one document
- Tapered panel option - maximum watershed
- Polyiso sheets: 25mm, 50mm, 75mm thicknesses, 1.2m wide x 2.27m long
- Steel: Metalcraft Metcom 7, 0.55g thick (alternatives may be used if certified by the project architect or engineer)
- Highest R-value - maximum ROI
Scope of use
The Viking WarmSpan System is designed for use as an insulating roof on buildings within the following scope:
- the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and maximum floor plan areas; and,
- on limited access flat roofs with steel structural decks subject to specific structural design; and,
- with roofs constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
- with roofs constructed to suitable falls (refer paragraph 15.3 and 15.4 of the Warm Roof BRANZ Appraisal); and,
- with no integral roof gardens; and,
- situated in NZS 3604 Building Wind Zones, up to, and including Extra High.
The Viking WarmSpan System has also been appraised for duability and thermal performance as an insulated roofing system on buildings that are the subject of specific design with no building height restriction. Building designers are responsible for the building design and for the incorporation of the Viking WarmSpan System into their design in accordance with the declared properties and instructions of Viking Roofspec.
The Viking WarmSpan System must be installed by Viking Roofspec Licensed and Trained installers.
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1
- Clause B2 Durability: Performance B2.3.1, B2.3.1(b)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
- Clause H1 Energy efficiency : Performance H1.3.1, H1.3.1(a)
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Product Criteria
Design requirements
Product specification and incorporation of Viking WarmSpan into the building design shall be carried out by a designer/architect/engineer or a building professional who:
- Is qualified to design the building under the 'Scope' of use of this product.
- Has ready access to the technical specifications including installation details and standards referenced in the BRANZ Appraisal No. 713 (2018) where the design limitations are outlined for the scope of this PTS.
Click here for a comprehensive list of Viking WarmSpan accessories.
Installation requirements
Installation shall be carried out by a Viking Roofspec trained and licensed installer. Installation shall be undertaken in accordance with all relevant technical information related to the selected installation method, including information contained within the appraisal. Long term properties of the material may be affected by contact with petroleum-based products such as oils, greases and solvents.
Maintenance requirements
The membrane roof system must be regularly checked (at least annually) for damage, rubbish and debris. Damage, such as small punctures and tears must be repaired and coatings reapplied as recommended by Viking Roofspec Ltd. Special care must be taken when inspecting the membrane roof systems to ensure the continuing prevention of moisture ingress, and repairs must be undertaken when required. Drainage outlets must be maintained to operate effectively.
Warrantees
The Viking WarmSpan System is backed by a 20-year product warranty. For specific projects, Viking WarmSpan can be eligible to be covered by Viking's Full System Warranty, which covers the product and installation in one document (conditions apply).
Environmental
- Reduction in energy consumption - less energy required for air conditioning and heating.
- The thermal performance of the WarmSpan system helps towards achieving Green Star points for a building.
- As a WarmSpan roof is insulated from the outside of the building, thermal performance is increased.
- WarmSpan polyiso has an R-value of 1.00 per 25mm thickness when new, and a long term thermal resistance of 0.95 per 25mm thickness.
- No CFC's in the manufacture of WarmSpan.
- Various other environmental benefits as a result of using Viking Enviroclad membrane. For a list of these, check the 'Environmental' section of the Enviroclad PTS here.
Quality Assurance
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ISO 9001 (Quality Management) |
Relationships
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Member of New Zealand Green Building Council |
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Date last validated:
06 July 2020 |
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Date last updated:
06 July 2020 |
Disclaimer
The Product Technical Statement (PTS) template is copyright to Construction Information Limited. However the content of this PTS is the responsibility of the product manufacturer/supplier.
Refer to the miproducts Terms and Conditions
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