Lower the Total Cost of Building with Viking WarmSpan

Viking Roofspec introduced WarmSpan to provide building owners and architects with a fully-engineered, energy-efficient low-slope roof system that reduces the cost of the substrate and its supports, therefore lowering the cost of the building significantly, while delivering increased energy efficiency and greater durability.

The key focus here is cost reduction without structural compromise. The Viking WarmSpan system costs approximately two-thirds less than a conventional timber substrate membrane roof. This is due to the fact that the Viking WarmSpan system eliminates two-thirds of the structural supports required for a traditional plywood substrate. The engineered WarmSpan system can span up to 3.6m, which is a significant difference when compared to the 400mm centres between rafters usually needed for a plywood substrate (which must be H3.2 treated). The steel tray itself is more cost effective and significantly faster to install than plywood, offering significant cost savings on both product and labour.

Further efficiencies can be achieved through Viking WarmSpan's energy saving properties.

WarmSpan Tray System

Viking Roofspec

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Viking WarmSpan is a warm roof that includes a proprietary steel tray substrate, supplied by Viking, to make up a complete roof system.

The Viking WarmSpan System has been appraised 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 Viking 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 durability 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.

Clause B1 STRUCTURE: Performance B1.3.1. The Viking WarmSpan System meets this requirement.
Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. The Viking WarmSpan System meets this requirement. See paragraph 10.1 of the Viking Warm Roof BRANZ Appraisal.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. The Viking WarmSpan System meets these requirements. See paragraphs 15.1 - 15.9 of the Viking Warm Roof BRANZ Appraisal.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. The Viking WarmSpan System meets this requirement and will not present a health hazard to people.
Clause H1 ENERGY EFFICIENCY: Performance H1.3.1 (a). The Viking WarmSpan System will contribute to meeting this requirement. See paragraph 14.1 of the Viking Warm Roof BRANZ Appraisal.
Clause C/VM2 FIRE PERFORMANCE (of wall and ceiling linings) - ISO9705, Group 1S = highest possible rating.

BRANZ Appraised

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