Tag Archive: cladding materials
DURAGROOVE CLADDING IS A VERTICALLY GROOVED PANEL WHICH PROVIDES A MODERN LOOK FOR EXTERIOR OR INTERIOR INSTALLATION. AVAILABLE IN DIFFERENT PROFILES AND SPACING WIDTHS, DURAGROOVE GIVES YOU THE CHOICE AND FLEXIBILITY TO USE THE PRODUCT THAT BEST FITS YOUR PROJECT.
DURAGROOVE HAS A SHIPLAP JOIN WHICH MAKES IT A SIMPLE AND QUICK PRODUCT TO INSTALL, AND CAN BE USED IN SINGLE STOREY AND MEDIUM HEIGHT INSTALLATIONS.
DURAGROOVE FACADE SYSTEM
- VERTICALLY GROOVED FOR A CONTEMPORARY ALTERNATIVE TO THE TRADITIONAL WEATHERBOARD LOOK
- IS LIGHTWEIGHT AND DURABLE
- PANELS ARE ACRYLIC SEALED WHICHAIDS PAINT APPLICATION
- QUICK TO INSTALL BECAUSE IT ELIMINATES THE NEED FOR TAPED AND FILLED JOINTS
- PANELS ARE NOT AFFECTED BY TERMITES, AIR, STEAM, SALT OR SUNLIGHT
- AVAILABLE IN 3 PROFILES:
DURAGROOVE SMOOTH – WIDE (150MM) DURAGROOVE SMOOTH – NARROW (100MM) DURAGROOVE WOODGRAIN – WIDE (150MM)
Duragroove is a strong and durable cladding which has distinctive vertical grooves and is suitable for finishing with a textured paint, creating a rendered look. Duragroove is suitable for low to medium rise buildings and can be used on both timber and steel framed building. It is also ideal for renovations and alterations to existing dwellings. In smaller areas it provides a distinctive and modern looking feature wall and can be used either in interior or exterior applications.
- A choice of groove widths and finishes available
- Has a shiplap join to ease installation
- Is lightweight and durable
- Quick to install because it eliminates the need for taped and filled joints
- Panels are not affected by termites, air, steam, salt or sunlight
ENERGY EFFICIENCY CONSIDERATIONS
Energy efficiency requirements have been introduced into the Building Code of Australia (BCA) for both commercial and residential buildings. Thermal heat transfer into and out of the building envelope will effect the running cost of the building and careful consideration of thermal heat transfer needs to be addressed by the architects, engineers and building designers. Thermal bridging through steel framing will diminish the total R-Value; thermal conductance, of the wall. Thermal breaks are required for steel framed buildings and should be installed between the top hat sections and the Duragroove panels. Thermal break tapes should have a minimum R-Value of 0.2.
Duragroove panels are manufactured from Portland cement, finely ground silica, cellulose fibres and water. Panels are cured in a high-pressure steam autoclave to create a durable, dimensionally stable product. Duragroove panels are manufactured to the Australian / New Zealand Standard AS/NZS 2908.2-2000 Cellulose- Cement Products, Part 2: Flat sheets and Duragroove is classified as Type A-Category 2.
BGC Fibre Cement products have been tested in accordance to Australian Standard AS1530.3 – 1989. These tests deemed the following Early Fire Hazard Indices:
- Ignition Index 0
- Spread of Flame Index 0
- Heat Evolved Index 0
- Smoke Developed Index 0-1
BGC Duragroove physical properties make it a very durable product.
- Duragroove panels are immune to permanent water damage in both short and long-term exposure.
- Duragroove panels will not rot or burn and are unaffected by termites, air, steam, salt and sunlight.
- Duragroove panels are not adversely affected over a temperature range of 0°C to 95°C.
Vapour permeable sarking must be installed in accordance with the AS/NZS 4200.2– ‘Pliable building membranes and underlays – Installation’ and the sarking manufacturers’ guidelines. The sarking should have the following properties:
- Vapour barrier – low or medium
- Water barrier – high
Vapour permeable sarking is used to prevent moisture ingress by acting as a drainage plane whilst enabling water vapour build up from inside the frame to escape.
Duragroove panels have relatively low thermal conductivity: R-value. At Equilibrium Moisture content the approximate R-Value of Duragroove is; – 0.55 W/m°C.
WEATHER RESISTANCE / FREEZE THAW
Duragroove conforms to the Building Code of Australia (BCA) requirements for external wall applications. Duragroove facade system has been tested to AS/NZS 4284 Testing of Building Facades. Duragroove subject to freeze/thaw conditions must be painted. Duragroove should not be used in situations where it will be in direct contact with snow or ice for prolonged periods.
PANEL SIZES AND MASS
|THICKNESS mm||FINISH||MASS KG/M2||WIDTH mm||LENGTH mm|
Duragroove Smooth Narrow 100mm between grooves. 4.5mm width of groove Duragroove Smooth Wide 150mm between grooves. 4.5mm width of groove Duragroove Woodgrain 150mm between grooves. 4.5mm width of groove
- Width +0/-1mm
- Length +0/-2mm
- Thickness +10%/-0%
- Diagonals difference (max) 2mm
- Edge straightness deviation (max) 1mm
HANDLING AND STORAGE
Duragroove must be stacked flat, up off the ground and supported on equally spaced (max 400mm) level gluts. Care should be taken to avoid damage to the ends, edges and surfaces. Sheets must be kept dry. When stored outdoors it must be protected from the weather. Sheets must be dry prior to fixing, jointing or finishing.
EXTRA CARE MUST BE TAKEN AT THE SHEET EDGES TO PREVENT CRACKING OF THE SHIPLAP JOIN.
The durability of galvanised nails and screws used for exterior cladding in coastal or similar corrosive environments can be as low as 10 years. For this reason BGC recommend the use of stainless steel fasteners within 1km of the coast or other large expanses of salt water.
ACCESSORIES AVAILABLE FROM BGC
|EPDM FOAM GASKET (Used to prevent moisture ingress at sheet joins).||25m|
DURAGROOVE TO TIMBER FRAME
- Screws should be countersunk 1.5mm and filled with BGC Exterior Finishing Compound or Epoxy sealer such as Megapoxy P1, Hilti CA125 or Hilti CA273 and sanded flush to provide a flat surface for finish coating.
- Nails must be driven flush to the panel surface.
DURAGROOVE TO STEEL FRAME
Duragroove panels can be installed vertically to both timber and lightweight steel frames. Ensure that the frame is square and work from a central datum line. The frame must be straight and true to provide a flush face to receive the panels. BGC recommend a maximum tolerance of 3mm-4mm in any 3000mm length of frame. Duragroove will not straighten excessively warped or distorted frames and any warping may still be visible after Duragroove is applied. Warped framing will require remedial action.
Use of a timber frame must be in accordance with AS1684 – Residential timber-framed construction and the framing manufacturers’ specifications. Use only seasoned timber. Do not use unseasoned timber as it is prone to shrinkage and can cause sheets and frames to move up. “Timber used for house construction must have the level of durability appropriate for the relevant climate and expected service life conditions including exposure to insect attacks or to moisture which could cause decay” – Reference AS 1684.2.
THE FRAMING WIDTH AT SHEET JOINTS MUST BE A MINIMUM OF 45MM.
THE INTERMEDIATE SUPPORT STUDS SHOULD BE A MINIMUM OF 70 X 35MM.
LIGHTWEIGHT STEEL FRAMES
Use of steel frame must be in accordance with AS3623 – Domestic metal framing and the framing manufacturers’ specifications. Framing members must have a Base Metal Thickness (BMT) between 0.50 to 1.6mm. The steel framing must have the appropriate level of durability required to prevent corrosion. The framing width at sheet joints must be a minimum of 50mm. The intermediate support studs should be a minimum of 64 x 35mm.
MAXIMUM STUD & FASTENER SPACING
|GENERAL AREAS OF WALLS (MM)||WITHIN 1200MM OF BUILDING EDGES (MM)|
|N1, N2, N3, N4||600||200||600||200|
Duragroove panels should be installed vertically with all sheet edges fully supported. The centre joints must coincide with the At every vertical joint, fix a continuous strip of EPDM Foam Gasket to the vapour permeable sarking along the stud. This assists to prevent the ingress of moisture at the sheet joins. centre lines of the framing member and all sheets should be installed in one direction. Position the underlap sheet on every stud 3mm past the centre of the stud to ensure the fasteners fixed at the edge of the sheet have adequate distance into the stud.
SHEET EDGE POSITION
As detailed on p6, there are several different fasteners that can be used to fix Duragroove panels.
FIBRE CEMENT NAIL FIXING – TIMBER FRAME
FLUSH SCREW – LIGHTWEIGHT STEEL FRAME
COUNTERSUNK SCREW – LIGHTWEIGHT STEEL FRAME
To fix the first sheet, set in place ensuring the required edge distances are maintained.
FIX FIRST SHEET
FIX NEXT SHEET
Once both sheets are fixed, check the joint for gaps and fill with additional sealant if required.
The architectural intent and details of buildings vary from one designer to the next, and the variety of facade details would be impossible to catalogue. The detail diagrams following are intended to assist the designer in achieving a high quality weather resistant Duragroove installation. The designer should not digress from the specification set out in this manual.
SLAB EDGE/EAVE JUNCTION
EXTERNAL CORNER – STEEL
INTERNAL CORNER – SEALANT OPTION
INTERNAL CORNER – STEEL
VERTICAL BUTT JOINT
UPPER FLOOR JUNCTION
UPPER FLOOR JUNCTION – OPTION 2
HORIZONTAL JUNCTION 2
Thermal breaks are required for steel framed buildings, in walls enclosing habitable and or usable spaces. Careful consideration of thermal heat transfer and the position of thermal breaks need to be addressed by the architects, engineers and building designers.
Balustrades, parapets, and other non-enclosing wall elements may not require thermal bridging, except where the possibility of high thermal heat transfer exists through the steel CFS sections to the main structural steel element of the building.
Designers, specifiers and builders have a duty of care to identify moisture-associated risks with any individual building design.
Wall construction design should consider both the interior and exterior environments of the building to effectively manage moisture. Special consideration should be given to buildings that are in extreme climates or at higher risk of wind driven rain.
In addition, all wall openings, penetrations, junctions, connections, window heads, sills and jambs must incorporate appropriate flashing for waterproofing. All other components, materials and installation methods used to manage moisture in walls should comply with the relevant standards of the Building Code of Australia (BCA).
BGC warrants its products to be free from defects caused by faulty manufacture or materials. If any of its products are so defective the company will at its option, repair or replace them, supply equivalent replacement products or reimburse the purchase price.
This warranty shall not apply to any loss or consequential loss suffered through or resulting from defects caused by faulty manufacture or materials.
Fittings or accessories supplied by third parties are beyond the control of BGC and as such is not warranted by BGC.
BUSHFIRE AND BOUNDARY WALL AREAS
BGC Duragroove is eminently suited for both bushfire and boundary wall applications in residential and multi residential buildings.
BGC Duragroove can be used as a stand alone product to achieve up to BAL 40 when fixed direct to frame as per the fixing instructions in this manual.
BGC Duragroove when used in conjunction with BGC 16mm Wet Area Fireboard will comply with the requirements of AS3959:2009 and AS1530.4 to achieve BAL FZ>10 as well as 60 minute and 90 minute boundary wall systems.
BUSHFIRE AS3959:2009 APPLICATIONS.
AS3959:2009 sets out a series of Bushfire threat levels to buildings described as BAL (Bushfire Attack Levels) as follows:
BAL-Low, BAL-12.5, BAL-19, BAL-29, BAL-40 or BAL-FZ (Flamezone).
BGC Duragroove may be used to achieve a BAL-40 or BAL-FZ>10 when used in conjunction with 16mm Wet Area Fireboard.
BGC Duragroove in conjunction with BGC 16mm Wet Area Fireboard can achieve both 60/60/60 and 90/90/90 FRL fire ratings from the outside as required by the BCA.
Where an exterior wall is required to achieve 60/60/60 FRL (Fire Resistance Level) from the outside, 1 layer of 16mm BGC Wet Area Fireboard installed with BGC Duragroove over the Wet Area Fireboard will meet minimum BCA requirements. Similarly 2 layers of 16mm BGC Wet Area Fireboard used in conjunction with BGC Duragroove will achieve 90/90/90 from the outside.
NOTE: All external walls must have sarking beneath the BGC Duragroove. No adhesives are to be used when installing Wet Area Fireboard and the BGC Duragroove. Nails or screws must be used.
For more information please contact your nearest BGC Fibre Cement office.
BOUNDARY WALL SYSTEM
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