ACM Fire Compliance in Waikato and Bay of Plenty

How do you check ACM cladding fire compliance?

For ACM cladding on projects in Waikato and Bay of Plenty, check the exact panel and proposed wall assembly against the consented fire design before ordering. A product label or brochure is not enough: the supporting evidence must suit the specified product, its intended use and the project's compliance pathway.

For a head contractor or QS, the useful question is whether the quoted panel matches what the design requires. Resolving that before procurement reduces the risk of buying material that needs further assessment, replacement or a consent amendment.

Why does the ACM core matter for fire compliance?

ACM consists of aluminium skins bonded to a core. Products can look similar from the outside while having different core compositions and fire performance, so colour and panel thickness alone do not define an equivalent product.

Terms such as FR, fire retardant and mineral core need supporting evidence. They should not be treated as interchangeable descriptions or as proof that a panel is suitable for every building.

AS 1530.1 is a test for combustibility of materials. Do not assume an ACM panel is non-combustible because its outer skins are aluminium, or treat a result for one component as a result for the complete panel.

Ask for the manufacturer's exact product designation, core description and relevant test or classification reports. Those details should remain consistent across the specification, quotation, purchase order and delivery records.

Which fire requirements apply to an external wall?

The applicable requirements depend on the building and its compliance pathway. Building height, use, proximity to boundaries and the wall construction can affect what the designer or fire engineer needs to assess.

C/AS2 is an Acceptable Solution used for certain buildings, not a blanket approval for an ACM product. Its external wall fire requirements changed in 2021, so an older product brochure or previous project approval may not establish suitability for a new project.

Ask the design team to confirm the applicable compliance document and edition, together with any project-specific requirements. Where an Alternative Solution is used, establish what evidence and limitations support that assessment.

We recommend resolving unclear fire requirements through a written design query. A cladding price should not be used as an assumed confirmation of the fire design.

What fire evidence should a QS request with an ACM quote?

Start with a named product rather than a generic allowance for ACM. Request the proposed panel thickness, core type, finish and fixing system, along with any exclusions affecting the specified wall assembly.

Then request evidence relevant to the project's requirements. Depending on the compliance pathway, that may include material test reports, classification reports, system testing or a project-specific assessment from the appropriate designer.

Check what each document actually covers. Product names, thicknesses, substrates, joints and fixing arrangements may limit its application, and a summary sheet may leave those limits out.

Record any outstanding evidence separately from the commercial comparison. This lets the team see whether a lower price reflects an equivalent compliant offer or a product that still needs technical review.

Does a compliant panel make the whole wall compliant?

A panel's fire evidence does not automatically establish compliance of the complete external wall. Insulation, membranes, cavities, substrates and junctions can also affect the assessment.

The quoted scope needs to identify who supplies and installs each relevant component. Where cavity barriers or other fire-stopping details are required by the design, their location, fixing and inspection responsibilities should be clear before work starts.

Fire compliance also does not replace weathertightness design. NZ Building Code Clause E2 addresses external moisture, and the cladding must be installed with the specified drainage, flashings, joints and interfaces.

Review window heads, parapets, base details and penetrations with the design team. An on-site change intended to solve one issue should not compromise another requirement.

How should you assess a proposed ACM substitution?

Treat a change of manufacturer, core, thickness or fixing system as a technical review, even if the replacement has the same colour. A cheaper panel is only a useful saving when its suitability and any resulting design changes are understood.

Submit the proposed product details and evidence to the responsible designers before procurement. Confirm whether the change affects the consent documents and what approval process is needed.

Include fabrication and installation consequences in the comparison. Different routing instructions, fixing requirements or panel sizes can change quantities, waste and labour, making the material-only saving misleading.

Keep the accepted product reference visible on procurement documents. Substitutions made later because of availability need the same review, rather than an informal agreement at delivery.

What records should be kept during installation?

Keep delivery information that identifies the panels supplied, and reconcile it with the approved product. Retain labels or batch references where available so the installed material can be traced back to the procurement records.

Agree inspection points before relevant work is covered. Photographs and inspection records can help demonstrate concealed fixings, cavity components and interfaces, but they should be tied to identifiable locations.

Confirm the required handover documents at the outset, including any PS3 construction statement, warranties and maintenance information. A PS3 records construction within its stated scope; it does not replace product evidence or establish the adequacy of the design.

We have installed ACM since 2006. Our services include QS sizing from drawings, cutting, rolling, CNC routing, grooving, fabrication, installation and site management, giving contractors a practical basis for discussing how specified details will be built.

Can we review your ACM drawings before you order?

For commercial projects in Waikato and Bay of Plenty, send drawings, specifications and the relevant fire requirements to tenders@kiwicladding.co.nz. Your enquiry reaches our quantity surveyor directly.

Include the panel schedule and any proposed substitutions so we can price the stated scope and flag items needing design clarification.

Frequently asked questions