exterior cladding options

3 Corners, Joints & Junctions QT Eco Series

April 16, 2013 by

3.1 Internal & External Corners

Internal corners can be formed by continuing the QT FullMesh around the corner or by embedding a QT CornerMesh into the base coat render. External corners can be formed by embedding a QT CornerMesh into the base coat render or by fixing a corner bead prior to rendering. In all cases the abutting corner panels must be bonded with polyurethane foam adhesive.

3.2 Relief Joints

Relief joints are required to accommodate any structural movement or panel movement due to temperature or moisture changes. If the panel above or below an opening is less than 300mm in depth or more than 2400mm in length the panel must be articulated by creating a vertical expansion joint to reduce and/or relieve the stress in the panel and coating system. All other corner openings must be reinforced with QT 45˚Mesh. The QT 45˚Mesh helps prevent any 45˚hairline cracks forming from the corner of any opening.

3. 3 Control joints

Control joints are designed to relieve structural movement between the wall cladding and building frame and also relieve any stress that builds up in the applied coating system. Vertical control joints are required at no greater than 5 metre centres (+ or – 500mm) in walls greater than 8 metres in length. Double studs are required at all vertical control joints. Vertical joints are best aligned with windows, doors, openings, or internal corners. Where timber floor joists are used a 15mm (nom), horizontal control joint must be provided at floor levels to allow for shrinkage and movement of the joists. 10mm control joints must also occur where the QT EcoSeries Wall Panels meet alternative wall claddings eg. Weatherboard, brickwork, etc. On gable ends, a horizontal control joint will be required at the top plate of the wall so as to separate the gable wall from the wall below. Control joints can be formed with the use of a backing rod and sealant or by the installation of uPVC expansion bead.

3. 4 Junctions

Ecobrick BGC FIBRE CEMENT

April 11, 2013 by

Efficient and environmentally friendly, ecobrick is lightweight (approximately half the weight of a clay fastwall brick). When used as an internal wall in conjunction with the traditional clay brick external wall, ecobrick improves the resistance to heat moving through that wall by 57%.

Ecobrick not only improves the thermal efficiency of walls, but improves their acoustic values as well. The aerated part of ecobrick is made up of non-connected air bubbles that do not allow noise to travel across these spaces. As a result, noise bounces off a hard surface, which means that when you use ecobrick inside a room, the background noise will disappear. These air bubbles are also the reason for ecobrick’s higher resistance to heat, in the same way as bulk insulation works in a roof space.

Ecobrick:

6 star energy rating
lightweight and simple to install
excellent acoustic and fire properties
environmentally friendly and recyclable

DIMENSIONS (mm)

300 x 162 x 90

300 x 76 x 90

600 x 200 x 75

600 x 200 x 100

600 x 200 x 150

600 x 200 x 200

600 x 400 x 100

600 x 600 x 100

COMPOUNDS

Builders Choice Thin Bed Mortar – 20kg

Builders Choice AAC Cement – 20kg

*some sizes may not be available in all states, please check with your local BGC office for availability.

7.0 Floor Covering Installation PowerFloor

April 4, 2013 by

The following sections describe the type of preparation required and any special considerations for common floor coverings.

7.1 Carpet Installation

Panel Surface Preparation

Sweep the floor surface to remove debris and loose particles. Expose all surface blemishes such as chips, cracks, gaps, ridges or the like. Fill all unacceptable locations with an appropriate and compatible patching compound such as Hebel Patch or levelling compound as required. Ensure panels are then dry.

Carpet Smooth Edge Installation

Installation of Carpet Smooth Edge (Gripper) is to be in accordance with AS/NZS 2455.1:1995.

Installation of carpet gripper prior to laying carpet requires the use of specifically selected nails or course threaded screws. Standard fixings supplied with the carpet gripper are not suitable for fixing to Hebel PowerFloor panels. Carpet gripper strips are available without factory supplied nails. For carpet gripper installation near the panel edge, only glue is recommended. If relying on glue only, the carpet can not be stretched until the glue is set after approximately 24 hours.

Fixing Type	Description	ApplicationMethod	Installation Notes
Twist Nails	51mm dome head twist nail	Coil Nail Gun (Refer to Fig 7.1)	The head of the twist nail should finish flush with the surface of the gripper strip
Screws	Type 17 point - course thread No. 8g x 50mm - Countersinking screw	Makita 6834 Auto Feed Screwdriver (Refer to Fig 7.2)	The head of the twist nail should finish flush with the surface of the carpet gripper strip

Underlay Installation

Minimum medium duty underlay is to be used. No other special requirements.

Carpet Installation

As per carpet manufacturer’s guidelines. No other special requirements.

7.2 Tile Installation

Panel Surface Preparation

Tile Installation

As per manufacturer’s guidelines. Apply tiles to screed or adhesive as per normal floor.

Case 1 – Direct Stick Adhesive	Case 2 – On Screed
Sealer as per manufacturer’s recommendations	Sealer as per manufacturer’s recommendations
Waterproof membrane as required, for balconies and wet areas

Notes: Control Joints - ensure Control Joints are installed in tiles at the appropriate location of floor Control Joints.

Penetration - seal penetrations through waterproof membrane.

7.3 Vinyl Installation

Panel Surface Preparation

Components	Case 1 – Screed	Case 2 – Masonite
Concrete screed	As per tiles	Not required
Masonite	Not required	Install with twist nails as with carpet smooth edge
Vinyl	As per standard practice (no special requirements)	As per standard practice (no special requirements)

Notes: 1. Ensure panel preparation is completed properly and thoroughly to avoid crunching. When screed is used, ensure that the additional load is taken into account in the sub floor design.

7.4 Timber Installation

Panel Surface Preparation

Moisture

Timber is affected by changes in environmental conditions and it is good practice to allow the flooring to acclimatise to the environment before installation. If there is significant moisture in the Hebel PowerFloor (>6%) a membrane, such as min. 200 micron polyethylene sheeting, should be placed over the top surface of the PowerFloor.

Timber Strip Flooring

Batten fix - ensuring flatness is not as critical as direct mechanical fix. Anchor battens at the required centres using anchors suitable for AAC, eg. Mungo MBSP1080.

Direct mechanical fix - install min. 12mm plywood sheets to PowerFloor using construction Maxbond or equivalent and 65-75mm coarse thread countersunk screws at max 600mm ctrs.

Direct Glue Fix – Select a floor adhesive system suitable for gluing timber flooring to a porous substrate. Prepare Hebel PowerFloor panels as per adhesive system instructions. Apply primer/sealer (as required) and allow to set, then apply adhesive to Hebel PowerFloor panels in small sections and lay timber flooring ensuring good adhesion is achieved, use mechanical fixing (hidden) where required, repeat for remainder of floor area.

Floating Timber Floor

Underlay / backing installed as per normal for a concrete slab.

No special requirements for floating timber flooring installation.