DIRECT FIXING
1.1 TO CONCRETE SOFFIT
■ The boards are produced in the standard size of 2400 x 1200mm. They must be fixed directly to the concrete soffit using a minimum of 11 insulation fasteners, with incorporated washer head diameter of 30 mm (min). The fasteners should provide a minimum embedment of 40mm into the solid substrate and they must be evenly distributed over the entire surface of the board. (Note: The substrate and fixing materials must be fit for purpose. Design loading on the board is not to exceed 0.375kPa for this fixing pattern. Additional fixings may be required when the boards are subjected to greater wind loads.) Please contact CNZ Insulation for advice.
■ Use two rows of 4 fasteners along the length, between 50 to 150mm from edge of the board; and 3 fasteners along the middle in an offset position from the exterior rows of fasteners
■ The board joints can be staggered or aligned. Repeat steps to install the board in a continuous layer on the underside of the concrete soffit.
■ If required, tape all joins with a minimum 96mm wide insulation tape. Ensure to seal around the perimeter and joins, this will prevent air flow between any air cavities formed below or above the boards.
1.2 TO CONCRETE WALL
■ Using construction adhesive, the board can be installed directly to dry and structurally sound walls free from moisture penetration. The wall should also be free from contaminant (e.g. oil, grease, paint) that may affect the adhesive bonding.
■ Ensure the existing walls are straight and plumb and remove any protrusions that could result in an irregular surface finish.
■ Apply a continuous bead of construction adhesive around the perimeter of the wall, and penetrations such as doors and windows.
■ Apply 25mm diameter blobs of construction adhesive at 300mm CRS across the width and height, to the back of the board, or directly on to the wall. Ensure that no blob is closer than 25mm to any edge of the board to ensure a clean joint between boards.
■ Align the board on the wall so that all joints butt tightly and apply pressure to ensure the board is plumb and true.
■ Temporary support may be required to support the board, in cases where the construction adhesive does not develop immediate grab.
■ Mechanical fixings may be used to complement the adhesive bond. In this case, after the adhesive has set, use 2 mechanical fixings at the mid height of the board, 15mm from the edge, with a 25mm nominal embedment into the wall.
■ Mechanical fixings should be positioned in the tapered edge of the plasterboard which will be covered after installation.
■ Repeat steps to install the boards and ensure there are no gaps between segments or abutments with other materials.
1.3 TO MASONRY
■ The boards can be mechanically fixed, if an acceptable adhesive bond cannot be achieved due to the wall surface conditions.
■ Screws should be fixed at a maximum of 600mm CRS horizontally and 300mm vertically. (Note: The substrate and fixing materials must be fit for purpose. Design loading on the board is not to exceed 0.375kPa for this fixing pattern. Additional fixings may be required when the boards are subjected to greater wind loads.) Please contact Conqueror NZ for advice.
■ Ensure that the existing walls are straight and plumb and remove any protrusions that may result in an irregular surface finish.
■ Predrill the wall substrate using a suitable masonry drill bit. Insert the masonry anchor with a minimum embedment of 25mm into the solid substrate.
■ Ensure the fixings are driven straight, with the heads embedded just below the surface of the plasterboard. Do not overdrive screws