1.3 Checking Joinery

1.3.1. Check Method

Check which method is to be used to install joinery. It is the builder’s responsibility for installing the appropriate flashing tapes, sill trays, window supports, and air seals according to E2/AS1. Window joinery must meet the requirements of NZS 4211 for the relevant wind zone.

1.3.2. Air seals

(Refer to E2/AS1 Paragraph 9.1.6.)

Seal the gaps between window and door frames or liners and the structural frame to prevent air flow between the joinery unit and the structural frame. This air seal must be on the interior (dry side of the opening). The same applies to openings formed by fixtures such as meter boxes.

Penetrations through drained cavities to NZBC E2/AS1: External moisture, 9.1.9 Penetrations and 9.1.10 Windows and doors.

Install the head flashing and seal it to the wall underlay with flexible flashing tape or an additional flap of flexible wall underlay. The head flashing must bridge the cavity so that any water that has leaked into the cavity above the window is directed to the outside.

1.3.3. Recessed Joinery

Ensure the specified clearance for individual Rockcote System from the framing to the back of the aluminium flange is applied.

Allow a 5 mm gap between the edge of the windows and the cladding flashing. This ensures a gap of 3-4 mm to apply sealant between the Render and the window flange.

Apply sealant along the edge of the joinery facing at jamb and sill.

Refer to technical details for individual system installations.

NOTE: Solid Filled Masonry construction – Sealant must not be applied to the window sill. This must be left open to allow drainage from the ‘trim cavity’ – refer WANZ WIS (Windows Association of New Zealand)

1.3.4. Face Fixed Joinery

Allow a 5 mm gap between the edge of the windows and the cladding flashing. This ensures a gap of 3-4 mm to apply sealant between the Render and the window flange. Apply sealant along the edge of the joinery facing at jamb and sill.

Refer to all technical details for individual system installations.

NOTE: Solid Filled Masonry construction – Sealant must not be applied to the window sill. This must be left open to allow drainage from the ‘trim cavity’ – refer WANZ WIS (Windows Association of New Zealand)

1.3.5. Garage Doors

Adequate timber fixing is in place at garage heads if steel lintels are in place to ensure fixing of cladding complies with Rockcote Systems fixing specifications, or other substrate manufacturers specifications.

Aluminium head flashing must be installed to allow drainage in cavity based cladding situations.

Apply PEF Backing Rod and sealant to the perimeter of the garage door jamb.

Refer to all technical details for individual system installations.

1.3.6. Anodised Joinery

Anodised Joinery must be masked and protected from all substrates.

Refer to Table 21 E2/AS1

1.3.7. Existing Joinery – Timber

Timber must be free of any loose material ie existing paint, rotten wood or other coatings as they may compromise subsequent coating applications.
Refer to specifiers details to ensure accurate system installation can be achieved.

1.3.8. Existing Joinery – Aluminium / Steel

Joinery must be free of any loose or corroded material.
Joinery must be professionally prepared by qualified sub-trade to ensure
Ensure perimeter of joinery allows for flashings or is sealed prior to coating applications.
Refer to specifiers details to ensure accurate system installation can be achieved.