2.4 Fastening Integra Panels to Steel/Timber Frame

There must be no horizontal surfaces that will be subject to water ponding; a minimum slope of 5 degrees is required (for metal caps only, 10 degrees for liquid membranes).

2.7.1 Ground Clearances

Refer to RCS TradeSpec™ 1.2.5 Ground Clearances

2.7.2 Wall Alignment

Using a straight edge, check joints are smooth and that the wall is flat and true.

2.7.3 Builder Supplied Flashings

Make sure all builder supplied flashings are in place. (Refer to RCS TradeSpec™ document 3.2 Builder Supplied Flashings) for a list of possible builder supplied flashings.

2.7.4 Resene Construction Systems Flashing Installation

Refer to the flashings as outlined within the RCSs RenderSpec™ section 5 and refer to their installation procedures in RCS TradeSpec™ document 3.1 Resene Construction Systems Flashings

2.7.5 Control/Expansion Joint Set outs

for more information about control joints refer to RCS TradeSpec™ Document 1.4 – Control Joints

2.7.6 Substrate Installation

Panels are installed horizontally. Vertical panel edges may be jointed on-stud or off-stud. Horizontal panel edges do not require edge fixing. Vertical panel joints must be staggered for each row (stretcher bond pattern). The panel must be supported at fixing locations with a vertical batten or spacer (minimum 100mm long). At the base of the wall, the panel must hang a minimum of 50mm below the supporting framing.

The minimum width of the panel that can be installed is 100mm wide. If you need to install a panel in smaller widths you must ensure care is taken, this must include predrilling panel and ensuring there is steel running through the panel, you should also install control joints of either end of the small width. Alternatively look at substituting the Integra for Graphex or EPS in the same thickness, ensure that control joints are formed where it junctions with the rest of the cladding.

2.7.7 External Corners

All external corners must maintain a stretcher bond pattern.

2.7.8 Internal Corners

All internal corners have an option of maintaining a stretcher bond pattern or butting the panel in hard to the adjacent wall.

Mortar Joints

Apply AAC Adhesive/MultiStop Bedding Compound to all panel joins ensuring that an even spread of mortar is through the entire joint of the panel. Ensure that any excess mortar does not fall into the cavity.

Priming Steel

Using one of the products below make sure that all exposed steel has been spot primed

  • Resene Galvo-Prime – Brush applied waterborne galvanised iron primer
  • Zinc-rich spray pack primer / solvent bourne – exterior solvent-borne Spray application

available from Resene Construction Systems or Resene ColorShops, or other selected merchants.

Fastening Panel

Fix panels with fasteners as given in Table 1 – Fastener Sizes

Fix fasteners into studs according to the number of fasteners per panel as shown in Table 1.

Fixings must be finished flush or slightly below the surface with the panel, pulling the Integra panel hard back against the cavity batten.

Fixings must be no closer than 50mm, but no further than 150mm from the horizontal panel edge and no closer than 50mm to the vertical edge.

Where studs are at 600 centres a single screw into the dwang/nog/bottom plate is required.

Table 1 – Fastener Sizes

Framing Type

Batten Size/Type

Panel Size

Screws per stud

Screw Size


20mm Graphex/EPS



100mm x 14g


40mm Graphex/EPS



125mm x 14g


20mm Graphex/EPS



125mm x 14g


40mm Timber



125mm x 14g


40mm Graphex/EPS *



150mm x 14g

* Must be on a rebated slab (any areas above roofs/windows must use a timber batten)

Wherever a Graphex/EPS batten is used then this can be substituted for a Timber Batten

When fixing the panel into a recessed foundation then adequate ventilation has to be achieved. There are 2 methods to achieving this:-

  1. Sitting the panel in  a starter strip 10mm of the foundation recess
  2. Sitting the panel hard down on the concrete recess and create weep holes in the panel at the following dimensions (1000mm2 per lineal metre), (Refer to Table 2 – Weep hole sizes). A plate/grill should then be placed over the hole. Make sure this plate is cleaned and etch primed before painting.

Table 2 – Weep hole sizes

  400mm centres 600mm centres 800mm centres 1000mm centres
Round Hole 23mm diameter 28mm diameter 32mm diameter 36mm diameter
Rectangular Hole 40mm x 10mm 60mm x 10mm 80mm x 10mm 100mm x 10mm