Metalcraft Roofing supply the Espan® 470 in Colorsteel® Maxam® as a vertical external wall cladding, and on roofs with a defined minimum pitch of 3 degrees for use on commercial and residential buildings within the following scope:

Location:

• In wind zones:
  • Up to and including Extra High as defined by NZS-3604:2011
  • Subject to specific engineering, if the engineer has satisfied themselves that the product, pitch and fixings will meet the conditions
• In all climate zones as defined by NZS-3604:2011, subject to the limitations set out below
• On buildings located within 1m of the relevant boundary, in respect of fire spread only

Building:

• On new buildings that have been designed and constructed to comply with the NZ Building Code (NZBC) using timber or steel framing
• On existing buildings using timber and steel framing where the designer and installer have satisfied themselves that the building is suitable for the intended building work
• In conjunction with a vapour permeable building wrap that has a permeability of 36g/m2/day of a vapour resistance of no more than 500MNs/g
• Can be used in conjunction with a potable water collection system

Espan 470 Colorsteel® Altimate® is supplied by Metalcraft Roofing for use as a vertical external wall cladding and roof cladding.

Location:

• In all corrosion zones, including very severe coastal zones, industrial and geothermal zones as defined in NZS3604:2011
• In all wind zones up to and including Extra High as defined by NZS-3604: 2011
• In design wind pressures (ULS) up to a fully factorised ultimate design load of 4.73kPa where specifically engineered
• Any proximity to a relevant boundary, in respect of spread of fire only

Building:

• On timber or light steel framing
• On new buildings where the roofing and wall framing structure has been designed to meet all applied loads during the construction phase and for the life of the roofing profile
• On existing buildings using timber or steel framing where the designer and installer have satisfied themselves that the roofing substrate will meet all applied loads
• In conjunction with a vapour permeable building wrap that has a permeability of 36g/m2/day or a vapour resistance of no more than 500MNs/g

Espan 470 COLORSTEEL® MAXAM®

Location:

• Espan® 470 may be used as a roof cladding system in exposure zones B, C & D as defined in Sec 4, NZS3604:2011. For use in 'Microclimatic considerations,' (as defined in Sec 4.2.4) refer to Metalcraft Roofing
• Espan® 470 may be used as a wall cladding system in exposure zones B & C. Where Espan® 470 is to be used in exposure Zone D, then only COLORSTEEL® Endura® or COLORSTEEL® MAXAM® may be used

Building:

• Where Espan® 470 is used in an insulated building in conjunction with steel framing, a thermal break is required. This will depend on the location of the insulation. Timber thermal breaks are recommended.
• Contact with other materials must be in accordance with Table 21 (E2/AS1), or compatible with the The New Zealand Metal Roofing Manufacturers Association Inc (NZMRM) Code Of Practice
• Building height and design wind speed is limited by the Espan 470 design load span tables
• Where it is used as a roof cladding system, Espan® 470 sheet lengths of ≤40m must be installed on a roof with a minimum pitch of 3°. Espan® 470 sheet lengths of >40m but less than <60m must be installed on a roof with a minimum pitch of 4°
• When used as a wall cladding, Espan® 470 must always be installed in conjunction with a drained cavity

Espan 470 COLORSTEEL® Altimate®

Location:

• Where specifically engineered, the engineer must satisfy themselves that the installation of the ESPAN® 470 (Aluminium), including pitch and fixings, will be adequate for the conditions
• Where fire resistance rating (FRR) is required, this is subject to specific fire design

Building:

• Contact with other materials must be in accordance with Table 21 (E2/AS1), or compatible with the NZMRM Code of Practice
• Building height and design wind speed is limited by the ESPAN® 470 (Aluminium) design load span tables
• For sheet lengths ≤40m, ESPAN® 470 (Aluminium) must be installed on a roof with a minimum pitch of 3°
• For sheet lengths of >40m but less than <60m, ESPAN® 470 (Aluminium) must be installed on a roof with a minimum pitch of 4°
• When used as a wall cladding, ESPAN® 470 (Aluminium) must always be installed in conjunction with a drained ventilated cavity
• Concrete and plaster can cause discolouration to the ColorCote painting. An inert membrane must be used to avoid contact
• Tanalised timber and some other timbers such as cedar can cause galvanic corrosion. Points of contact must be prevented; in mild environments an inert membrane may be used, in more severe zones full isolation with a rubber or neoprene gasket is required

Installation:

• Install ESPAN 470 over zincalume powder coated secret fixing clips. Clips to be fixed with galvanised steel (class 5 for severe corrosion zone), 10-12G, Type 17, CL5 Hex Washer head screws.
• ESPAN 470 (Aluminium) must not come in contact with or allow water runoff from dissimilar metals (Ref: NZMRM table 2.7.2)
• ESPAN 470 (Aluminium) must be separated from galvanised netting underlay with a high-density polystyrene batten or alternative
• Installation must be in accordance with Metalcraft and ColorCote technical information
• Where installed in conjunction with steel framing, a thermal break is required between the fixings and the framing. This will depend on the location of the insulation layer. Timber thermal breaks are recommended although care must be taken to ensure contact with the cladding is avoided

Espan 470 COLORSTEEL® MAXAM®

If designed, installed and maintained in accordance with all Metalcraft Roofing equirements, the Espan® 470 Roofing and External Cladding system will comply with or contribute to compliance with the following provisions of the NZ Building Code:

• B1 Structure: B1.3.1, B1.3.2, B1.3.3 (a), (b), (c), (d), (g), (h) & (i) — Building element, installation of a building element — B1/VM1, AS/NZS 2728:2013
• B2 Durability: B2.3.1 (b) — Minimum 15 yrs
• C3 Fire Affecting Areas Beyond the Fire Source: C3.4 (a), C3.5, C3.6, C3.7 (a), C3.8 & C3.9
• E2 External Moisture: E2.3.1, E2.3.2, E2.3.7 (a-c)
• F2 Hazardous Building Materials: F2.3.1
• G12 Water Supply: G12.3.1

See product technical statement for full information.

Espan 470 COLORSTEEL® Altimate®

If designed, installed and maintained in accordance with all Metalcraft requirements, the ESPAN® 470 (Aluminium) will meet the following
performance claims.

• B1 Structure: B1.3.1, B1.3.2, B1.3.3 (a, b, c, d, g, i) — B1/VM1, AS/NZS 2728:2013
• B2 Durability: B2.3.1 (b) — B2/VM1, AS/NZS 2728:2013
• C3 Fire Affecting Areas Beyond the Fire Source: C3.7 (a) — Acceptable solution, C/AS2-C/AS7
• E2 External Moisture: E2.3.1, E2.3.2, E2.3.7 (a-c) — Alternative solution
• F2 Hazardous Building Materials: F2.3.1 — Alternative solution

• Espan® 470 Roofing and External Cladding system will not contaminate potable water — AS/NZS 4020:2005
• Espan® 470 (Aluminium) will not contaminate potable water — AS/NZS 4020:2005