Installation Guide. ExoTec TM RAW (Pre-Finished) Facade Panel And Fixing System COMMERCIAL & RESIDENTIAL

Transcription

1 Installation Guide ExoTec TM RAW (Pre-Finished) Facade Panel And Fixing System COMMERCIAL & RESIDENTIAL Certificate CM40221 Australia October 2018 Make sure your information is up to date. When specifying or installing products, ensure that you have the current technical information and guides. If in doubt, or you need more information, visit or Ask on

2 CONTENTS 1 APPLICATION AND SCOPE Application Scope Specific design and detailing 3 2 DESIGN Compliance Slab and footings Ground clearances Coastal areas Moisture management framing Spacing for Commercial and Multi-Residential Buildings (Volume 2, NCC) Spacings for Residential Buildings (Volume 1, NCC) Fastener spacings 5 3 SUBSTRUCTURE AND PREPARATION Substructure Fixing 3.3 Weather Barrier Flashing Thermal Break 6 4 TOP HAT AND PANEL LAYOUT General Panel orientation Panel layout 6 5 FINISHES Site cut edges 7 6 PANEL FIXING General Panel fasteners Fastener durability 7 7 JOINTS Panel joints Vertical panel joints Horizontal panel joints Sealant filled joints Panel joints in high wind load areas Movement Joints 7 8 JUNCTIONS Slab junctions Soffit junction 8 9 CORNERS 8 10 WINDOWS 8 11 SPECIAL DETAILS Curved facades Parapet capping Abutments Inspection 9 1 APPLICATION AND SCOPE 1.1 APPLICATION ExoTec RAW s are high quality compressed, autoclaved, cement based building panels manufactured by James Hardie and are supplied pre-finsihed. Each face and edge of ExoTec RAW facade panel is treated with a special water repellent penetrating sealer that enhances the panel s stability and durability without hiding or changing its raw concrete look. The ExoTec RAW manufacturing process creates a natural variation in the colour and surface pattern look of each panel. This adds further to the natural industrial look of the facade as a whole. ExoTec RAW provides a durable, expressed joint panel appearance for building facades, fascias and soffits and, together with the fixing system, offers versatility to architects and builders. This is demonstrated by the variety of design styles that can be achieved including curved walls, panels installed vertically, horizontally or in a brick pattern. 9mm thick ExoTec RAW s may be used in wall facades, fascias and soffits. Important The natural variation in look between each ExoTec RAW is a feature of the panels. James Hardie is not liable for any variation in look between ExoTec RAW s or any variation in colour or surface pattern against any sample material provided. The architect/ builder/installer must ensure prior to specification that variation in look between panels is acceptable and also ensure that each ExoTec RAW meets all aesthetic requirements prior to installation. For further information Ask on SCOPE This Installation Guide is intended for use by architects, designers, specifiers and installers who may be involved in the specification of the ExoTec RAW and fixing system. 1.3 SPECIFIC DESIGN AND DETAILING For use of the ExoTec RAW and fixing system outside this published scope, the designer, architect or engineer must undertake specific design. James Hardie will not be responsible or warrant this product installed outside the scope of this Installation Guide. For advice on designs outside the outlined scope Ask on All dimensions shown are in millimetres unless noted otherwise. All Australian Standards referenced in this manual are current and must be complied with. 12 PRODUCT INFORMATION Material Durability Alpine regions Resistance to fire Maintenance Warranty PRODUCT & ACCESSORIES DETAILS SAFE WORKING PRACTICES Warning Working instructions Hole-forming Storage and handling Quality 21 MADE IN AUSTRALIA

3 2 DESIGN 2.1 COMPLIANCE All design and construction must comply with the appropriate requirements of the current National Construction Code (NCC), regulations and standards. 2.2 SLAB AND FOOTINGS The slab and footings on which the building is situated must be designed and certified by a qualified structural engineer according to all relevant codes, regulations and standards. 2.3 GROUND CLEARANCES Install external cladding with a minimum 150mm clearance to the earth on the exterior of the building or in accordance with local building codes if greater than 150mm is required. Also, maintain a minimum 50mm clearance between external cladding and roofs, decks, paths, steps and driveways. Adjacent finished grade must slope away from the building in accordance with local building codes, typically a minimum slope of 50mm over the first metre. Do not install external cladding in areas where it may remain in contact with standing water or debris. 2.4 COASTAL AREAS In coastal areas located within 1km* of the shoreline or large expanses of salt water (e.g. Port Phillip Bay, Sydney Harbour east of the Spit and Harbour Bridges, Swan River wet of the Narrows Bridge), one of the following is required: All horizontal and vertical expressed joints must be filled with a suitable sealant, refer to the sealant filled joints section within this specification. Where both the horizontal and vertical expressed joints are not filled, the joints and panels must be washed down twice a year. On unprotected walls, rain will perform this washdown, but where walls are protected by soffits above, the washdown twice per year is a maintenance requirement. * Exclusion zones apply, see section Exclusion Zones ExoTec RAW panels must not be used within 50m of an oceanfront or in areas subject to freeze thaw conditions, such as alpine areas. For high walls it may be necessary to provide flashing to drain the facade at one or more intermediate levels. The installation of smoke, vermin and other barriers must not restrict moisture from reaching flashings. For information on membranes, refer to Clause 3.3 of this manual. 2.6 TOP HAT FRAMING General ExoTec RAW s must be fixed to ExoTec and sections which are installed vertically over steel, masonry or timber structures, see Figure 1. ExoTec and sections must not be installed horizontally. Ensure a planar fixing surface for ExoTec RAW s. The structure can either be straightened or packed out between the substructure and s. Packing out of s must be limited to 20mm maximum. The nominal centres are 605mm for a 1200mm wide panel and 455mm for a 900mm wide panel, i.e. s are required at panel edges and at intermediate spacings within the panels. The ExoTec Top Hats at panel edges have the legs facing out from the structure and at intermediate locations the is used, with the legs fixed to the structure, see Figure 2. The maximum spans and nominal spacings of ExoTec s and s for wall and soffits applications for commercial and residential applications are listed in Tables 1 4. In wall applications, the maximum cantilever distance of the s is one quarter of the single span shown in Tables 1,3 and 4. For commercial and multi-residential applications, a qualified structural engineer must design the substructure and the connection between the substructure and the s. It is the responsibility of the project engineer to determine the appropriate wind pressures for the project and specify the fixing of the s to the structure. The engineer must limit the deflection of the supporting structure to span/250 for serviceability wind load. 2.5 MOISTURE MANAGEMENT ExoTec RAW and fixing system acts as a weather shield. To achieve a particular level of weather tightness, the designer must determine the appropriate moisture management detailing for the project. The designer should consider the following matters when making that determination: It is the responsibility of the builders and designers to identify moisture related risks associated with any particular building design. It is the responsibility of the builder to ensure appropriate moisture management is provided during framed wall construction through effective use of flashings, sealants and vapour permeable membranes such as, building wraps, vapour retarders and damp proof course. Before installing panels, all wall openings, penetrations, intersections, connections, window sills, heads and jambs must incorporate appropriate flashing and waterproofing. Materials, components and the installation practices that are used to manage moisture in framed wall construction must, at a minimum, comply with the requirements of relevant standards, building codes and the manufacturer s specifications. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 3

4 2.7 TOP HAT SPACING FOR COMMERCIAL AND MULTI-RESIDENTIAL BUILDINGS (VOLUME ONE, NCC) TABLE 1 TOP HAT SPACING FOR WALLS (COMMERCIAL) WALLS MAXIMUM EXOTEC TOP HAT AND JAMES HARDIE TM INTERMEDIATE TOP HAT SPANS (mm) FOR ULTIMATE DESIGN WIND PRESSURES SPAN TYPE TOP HAT SPACING (mm) ULTIMATE DESIGN WIND PRESSURE (kpa) Single Span span Continuous span Continuous TABLE 2 TOP HAT SPACING FOR SOFFITS (COMMERCIAL) SOFFITS MAXIMUM EXOTEC TOP HAT AND JAMES HARDIE TM INTERMEDIATE TOP HAT SPANS (mm) FOR ULTIMATE DESIGN WIND PRESSURES SPAN TYPE TOP HAT SPACING (mm) ULTIMATE DESIGN WIND PRESSURE (kpa) Single Span span Continuous span Continuous S TO TABLE 1 AND 2 1. deflection for serviceability limit state design to AS is limited to span/250, except where * is shown it is span/ Design wind pressures to be in accordance with AS for ultimate strength design. 3. For permissible design wind pressure, divide the ultimate strength design wind pressures by For higher design wind pressures (ultimate), Ask on TOP HAT SPACINGS FOR RESIDENTIAL BUILDINGS (VOLUME TWO, NCC) In residential applications, noggings between studs can be used as intermediate support for ExoTec s and Top Hat sections. The project engineer or stud framing manufacturer must design the framing and noggings to withstand the wind loads that will be applied to the façade. In some cases a series of horizontal s will often be required prior to installation of the vertical James Hardie s. Table 3 and 4 outlines spacing, spanning, and fixing centres for the following wind classifications in accordance with AS4055: N1-N4 and C1-C2. TABLE 3 TOP HAT SPACING AND FIXING CENTRES FOR WALLS (RESIDENTIAL TIMBER FRAME) WALLS - MAXIMUM EXOTEC RAW TOP HAT AND JAMES HARDIE INTERMEDIATE TOP HAT SPANS (mm) FOR WIND CLASSIFICATIONS Design Wind Classification Single-Span Span Type Two-Span Continuous AS4055 Wind Classification Maximum Top-Hat Spacing (mm) Maximum Span, Panel Height and Fixing Centres of s to Timber Frame (mm) Maximum Top-Hat Spacing (mm) Maximum Span (mm) Maximum Wall Height (mm) Maximum Fixing Centres of Top Hats to Timber Wall Frame (mm) N1 & N N3 & C N4 & C EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

5 TABLE 4 TOP HAT SPACING AND FIXING CENTRES FOR WALLS (RESIDENTIAL LIGHT GAUGE STEEL FRAME BMT MM) SOFFITS - MAXIMUM EXOTEC RAW TOP HAT AND JAMES HARDIE INTERMEDIATE TOP HAT SPANS (mm) FOR WIND CLASSIFICATIONS Design Wind Classification AS4055 Wind Classification Maximum Top-Hat Spacing (mm) Single-Span Maximum Span, Panel Height and Fixing Centres of s to Timber Frame (mm) Maximum Top-Hat Spacing (mm) Span Type Two-Span Continuous Maximum Span (mm) Maximum Wall Height (mm) N1 & N Fixing Layout for 0.75mm bmt 1 screw at each end, 2 at intermediate N3 & C screws at each end, 4 at N4 & C intermediate S TO TABLE 3 AND m walls can be achieved using three span continuous or greater. 2. AS 4055: 1992 Wind Loads for Housing used as basis for determining design pressures and hence geometrical limits apply to the dimensions of the building. 3. Relatively flat topography (eg T1 and T2) assumed any adverse topographical effects need to be accounted for to ensure that wind classification remains valid. 4. Design pressure capacity based on suction within 1200mm of building edges: N2=up to 1.25kPa:N3=up to 2.0kPa:C2=up to 3.0kPa. 5. For higher design wind pressures (ultimate), Ask on FASTENER SPACINGS Table 5 indicates the maximum fastener spacings at sheet edges and at James Hardie TM s for wall and soffit applications. TABLE 5 MAXIMUM FASTENER SPACING (RESIDENTIAL & COMMERCIAL) COMMERCIAL FASTENER SPACINGS FOR WALL AND SOFFIT APPLICATION Design wind pressure (kpa) 1200mm from edges AS 4055 Wind Classification General Nominal Spacing (mm) Maximum Fastener Spacing 1.5 N1 & N2 N1-N4, C1-C N3 & C N4 & C N5 & C N6 & C S TO TABLE 5 1. For AS4055 Wind Classifications, Edge denotes the AS 4055 design wind pressure level for areas within 1200mm of building corners. All other areas may be considered general areas which are denoted by General. Differentiation between general and edge areas will need to be made based on the geometry of the building and the code s definition of the edge zone width, noting that for AS 4055 this dimension is 1200mm and for AS/NZS it is a proportion of the building size or height. 2. All other notes in Tables 1-3 also apply. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 5

6 3 SUBSTRUCTURE AND PREPARATION 3.1 SUBSTRUCTURE The ExoTec and sections are installed vertically over steel girts, masonry, concrete walling and in residential applications over timber or light-gauge steel framing Masonry/Steel girts Ensure substructure is fit for purpose and designed in accordance with the relevant codes and regulations Timber Frame Use of timber frame must be in accordance with AS1684 Residential Timber Framed Construction and the framing manufacturers specifications. Use only seasoned timber. Timber used for house construction must have the level of durability appropriate for the relevant climate and expected service life and conditions including exposure to insect attacks or to moisture, which could cause decay, as stated in AS Light-Gauge Steel Frame Use of steel framing must be in accordance with NASH standard for Residential and Low Rise Steel Framing Part 1: Design Criteria and the framing manufacturer s specifications. Framing members must have a base metal thickness (BMT) between 0.55 to 1.2mm. The steel must have the appropriate level of durability required to prevent corrosion. 3.2 TOP HAT FIXING Commercial/Multi-residential Walls and Soffits A qualified structural engineer must design the substructure and the connection between the substructure and the s. For spanning capability, refer to Section 2.6 of this document Residential Walls (Timber and Light-Gauge Steel Frames) For spanning and fixing specification refer to Section 2.7. The recommended fastener to fix the system to both light-gauge steel frame and timber frame is presented below. Fix through to the timber or light gauge steel frame with M5.5 Buildex Class 3 Batten Zips Hex Head fastener (40mm long) James Hardie TM : Fix on either side of flange in accordance with Tables 3 and 4. ExoTec : Fix through channel in accordance with Tables 3 and HARDIEWRAP WEATHER BARRIER must be installed behind the ExoTec RAW and fixing system in accordance with AS/NZS Pliable Building Membranes and Underlays Installation and the Technical Data Sheet. The delivers a triple shield of protection to help against external weather penetration, internal condensation build up and external heat penetration. Additionally, it enhances the wall's thermal performance; refer to or for further information. If using an alternate product in lieu of, the designer must ensure that the product is fit for purpose and has the following properties in accordance with AS/NZS : Vapour barrier low or medium Water barrier high In hot humid areas of Australia, may not be suitable, refer to the building designer for a suitable membrane or Ask on Soft compressible insulation installed between the front of the wall studs and directly behind the external cladding can cause installation issues and is thus not recommended. 3.4 FLASHING All wall openings, penetrations, intersections, connections, window sills, heads and jambs must be flashed prior to and sheet installation. Refer to Clause 2.5 for moisture management requirements. 3.5 THERMAL BREAK The National Construction Code sections J1.5 and Volumes 1 and 2 respectively, state for both residential and commercial buildings a thermal break with a Material R value of no less than R0.2 must be installed behind external cladding where the cladding and internal lining make direct contact with the same metal frame. For further information relating to the suitability of HardieBreak Thermal Strip, refer to the installation guide at ExoTec RAW s are installed onto Top Hat framing. It is recommended that you refer to the project certifier to determine if a thermal break is required. If required, it is recommend that the specified thermal break is installed vertically behind the s and in front of the. 4 TOP HAT AND PANEL LAYOUT 4.1 GENERAL The panel layout must be considered in conjunction with the building framing system, i.e. the supporting spacing must suit joints between panels and the design wind pressures, see Figure 1. Where construction joints occur in the structure, these must be carried through the s and panels, see Figures PANEL ORIENTATION Where possible, ensure that all site cut and re-sealed edges are not fully exposed, and panels are orientated such that site cut edges are on the bottom of the panel. Where the back of the panel is open to the weather, contact James Hardie on for further requirements. 4.3 PANEL LAYOUT Panels are generally installed with a 10mm nominal vertical and horizontal expressed joint between adjacent panels, i.e. for 1200mm wide sheets and 10mm panel joints the grid dimension is 1210mm, see Figure 1. Vertical joints up to 20mm width can be formed, with additional care required at installation to ensure the panel edges cover the ExoTec Gasket Snap Strip on both sides of the joint. A minimum vertical expressed joint of 6mm is allowed with care. The vertical expressed joints may also be aligned or offset in a brick pattern layout. S Wherever feasible, use stock panel sizes to minimise site cutting. See Section 5.1 for Site Cut Edge treatment information. 6 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

7 5 FINISHES 7 JOINTS ExoTec RAW panels are pre finished with a factory applied clear sealer. ExoTec RAW panels are not suitable for site applied painting. 5.1 SITE CUT EDGES When using ExoTec RAW panels, all site cut edges must be resealed using an exterior-grade, penetrating clear sealer compatible with cement-based substrates. All site cut edges must be resealed prior to installing ExoTec TM RAW panels. It is best practice to install resealed site cut edges on a horizontal edge at the bottom of the sheet, or on a vertical edge that is not directly exposed. Any surface marks/dirt should be washed off with clean water and a clean rag/brush. Do not use detergent or solvents to clean any surface marks. Any surface scratches must also be resealed. The following sealers have been tested and are recommended for resealing site cut edges and surface scratches: Thompson s Water Seal Crommelin Natural Finish Sealer Two generous coats must be applied. Apply first coat of sealer generously to site cut edges, until the sealer no longer readily soaks in. Wait 15 minutes, then apply a second coat of sealer until it no longer readily soaks in. Refer to coating manufacturer for more information on the use of the selected sealer. 6 PANEL FIXING 6.1 GENERAL Exotec RAW façade panels must be fixed to the Top Hat System with exposed head fasteners (e.g. pan, wafer, hex heads). Before fastening, ExoTec RAW panels must be pre drilled with a 6mm masonry drill, which provides a 6.2mm to 6.3mm diameter hole; and ExoTec facade washers must be inserted between the panel and the fastener to provide a moisture seal (refer to Figure 3 for detail). Countersunk head screws are not recommended for ExoTec RAW s. 6.2 PANEL FASTENERS Exposed pan, wafer or hex head self drilling screw No. 10x25mm (Class 3 minimum coating). James Hardie has tested the screws displayed in the table below. For other screws not listed below, please consult with the screw manufacturer and James Hardie for suitability prior to use. Image Fastener Type Part Number Buildex Hex Head Metal Screw. Hex Drive 10G x 25mm Buildex Wafer Head Metal Screw Phillips Drive 10G x 24mm C MP 6.3 FASTENER DURABILITY Fasteners must have the appropriate level of durability required for the intended project. Fasteners must be fully compatible with all other materials that they are in contact with to ensure the durability and integrity of assembly. Contact the fastener manufacturer for further information. This is of particular importance in coastal areas, subject to salt spray and other corrosive environments. 7.1 PANEL JOINTS Panels are generally installed with a nominal 10mm wide expressed joint between adjacent panels, vertically and horizontally. Vertical joints to 20mm width can be formed with the ExoTec RAW and fixing system, with additional care required at installation to ensure the panel edges cover the ExoTec Gasket Snap Strip on both sides of the joint. 7.2 VERTICAL PANEL JOINTS At vertical panel joints, prior to fixing panels, the ExoTec Gasket Snap Strip is fitted into ExoTec s by starting at one end and pushing into the ExoTec along its length. Ends of the snap strips are butted together within s without any need for sealant. The ExoTec Gasket Snap Strip is a hi tensile roll formed steel section with rubber gaskets built in. It provides a primary weather shield for a design wind up to 4.0kPa, see Figure 4. For wind pressures above 4.0kPa, refer to section 7.5 Panel edges are fixed directly to the ExoTec without the need for packing at s. 7.3 HORIZONTAL PANEL JOINTS At horizontal panel joints, ExoTec Backing Strips are polyurethane sealant bonded to the back of panels to form a socket to which the next course of panels (or parapet capping) are fixed over, see Figure 5. The ExoTec Backing Strip is a 0.55mm base metal thickness (BMT) hi tensile rollformed steel section, with a pre formed stop to keep it fitted against the back of the top edge of the lower panel. 7.4 SEALANT FILLED JOINTS Where joints are required to be sealant filled, Joint Sealant and Bostik Seal 'N' Flex are recommended. Where vertical joints are sealed, a bond breaker tape must be installed behind the sealant as outlined in Figure PANEL JOINTS IN HIGH WIND LOAD AREAS For design wind pressures including and above 4.0.kPa, horizontal and vertical joints must be continuously sealed with a joint sealant over a bond breaker tape. Refer to Clause 7.4 for suitable joint sealant. Refer to the sealant manufacturer s instructions for application, safe use and clean up. 7.6 MOVEMENT JOINTS General Movement joints are required to limit or remove stresses from the panels. Movement joints are provided by the 10mm expressed or sealant filled joints at the perimeter of the panels Vertical Structural Joints Vertical structural joints are required in the cladding to coincide with structural joints in the structure to accommodate the anticipated movement. The vertical structural joint is constructed as shown in Figure 7. Vertical structural joints are also required where there is a discontinuity in the structure e.g. where two truss ends meet at a connection which allows movement. For details of abutment to masonry walls see Figures 28 and 29. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 7

8 9 CORNERS Horizontal Structural Joints Horizontal structural joints are required at slab level where the framing supporting the s moves with the creep deflection in the slab. See Figures 10, 11 and 12 for details which can cater for this deflection. See Table 6 for the required height of the flashing upstand. The project engineer is responsible for specifying the anticipated movement Construction Joints Refer to Clause 11.3 'Abutments' for finishing panels against an existing building or another cladding system. 8 JUNCTIONS 8.1 SLAB JUNCTIONS Head Where the cladding forms a junction with an exposed slab, the detail must provide for sufficient creep deflection in the slab. See Clause for creep deflection where crosses in front of the slab. See Figure 14 for typical detail which can cater for this deflection Base This junction can be treated in a number of ways, two of which are illustrated in Figures 14 and 15. See Table 6 for the required height of the flashing upstand. TABLE 6 HEIGHT OF FLASHING UPSTAND Maximum design wind pressure (kpa ULS) Minimum flashing upstand (mm) For permissible design wind pressure, divide ULS wind pressure by 1.5. It is essential that continuous flashing is provided behind the s at the base of walls to allow moisture to escape. Corners can be readily constructed using a folded corrosion resistant metal angle behind ExoTec RAW s, to support the corners see Figures 17 through 21. For ease of construction it may be preferred to fix the corner angle to one or both of the end s. 10 WINDOWS The ExoTec RAW and fixing system provides an opportunity to consider a range of alternative window treatments. The building designer, in conjunction with the window manufacturer, must consider the adequate weatherproofing of the window application, see Clause 2.5. Typical window details are shown in Figures 22 to 26. See Table 6 for the required height of the flashing upstand. 8.2 SOFFIT JUNCTION There are many ways of detailing the soffit junction and it is important to ensure that a drip edge or groove is provided. A typical approach on how to install the soffit fascia junction is shown in Figure 16. Ensure the ExoTec Gasket Snap Strip is installed continuously to the bottom of the fascia panel. It is essential that continuous flashing is provided behind the s at the base of the fascia to allow moisture to escape. See Table 6 for required height of the flashing upstand. 8 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

9 11 SPECIAL DETAILS 11.1 CURVED FACADES For Radii 10m or Greater Where the curve radius is 10m or greater, 9mm thick panels can be bent to the curve of the framing. Refer to Table 7 for maximum spacing. TABLE 7 MAX. TOP HAT SPACING FOR VARIOUS RADII Radii (m) 10 to Max. Spacing for 1200 wide panels (mm) >15 To suit wind loading 1. The closer the spacing of s, the less likely they will read through as facets in the panels, particularly at small radii. 2. 9mm thick panels may be able to be curved to a smaller radius, but this is likely to overstress panels. When fixing curved sheets, commence fixing from the centre ensuring full contact with s and work outwards to avoid drumminess. Particular care should be taken when curving panels to ensure the supports are on a true curve. If not, apart from poor appearance, there is a risk of locally over stressing the panels and causing cracking PARAPET CAPPING The design of the metal parapet capping should aim to minimise staining of the cladding, as follows: 1. Ensure the top of the capping has a slope towards the roof. 2. Provide a drip edge 30mm minimum out from the cladding face. 3. In addition, all joints in capping should be sealed. Figure 27 shows a typical design which meets these requirements. Refer to Table 8 for the required overlap. TABLE 8 PARAPET CAPPING OVERLAP Maximum design wind pressure (kpa ULS) Minimum capping overlap (mm) For permissible design wind pressure, divide ULS wind pressure by INSPECTION After panels are installed, the facade/fascia should be inspected to ensure: 1. Required number and location of fixings are correct. 2. Minor damage to panel edges are resealed, see section Adequate means of separation of compartments between stories behind the ExoTec TM Raw s. The inspection should be carried out by the relevant and qualified project expert, such as the structural engineer and qualified building certifier ABUTMENTS There are numerous methods of finishing panels against another cladding system. Typical details are shown in Figure 29. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 9

10 12 PRODUCT INFORMATION 12.1 MATERIAL ExoTec RAW s are high quality compressed, autoclaved, cement based building panels manufactured by James Hardie. Basic composition is Portland cement, ground sand, cellulose fibre and water. Refer to Section 13 for ExoTec RAW Facade Panel sizes. building products are manufactured to Australian/New Zealand Standard AS/NZS Cellulose Cement Products (ISO 8336 Fibre Cement Flat Sheet ). ExoTec RAW is classified Type A, Category 3 in accordance with AS/NZS Refer to Section 13 for the nominal density of the ExoTec RAW facade panel and panel sizes. A 9mm panel is the minimum thickness suitable for external wall applications DURABILITY Resistance to Moisture ExoTec TM has demonstrated resistance to permanent moisture induced deterioration by passing the following tests in accordance with AS/NZS : Water permeability (Clause 8.2.2) Warm water (Clause 8.2.4) Heat rain (Clause 6.5) Soak dry (Clause 8.2.5) Resistance to Termite Attack Based on testing completed by CSIRO Division of Forest Products Report Numbers FP349 and FP274 fibre cement has demonstrated resistance to termite attack ALPINE REGIONS ExoTec RAW panels are not suitable for use in Alpine Regions MAINTENANCE It is the responsibility of the specifier to determine normal maintenance requirements with the extent and nature of maintenance depending on the geographical location and exposure of the building. As a guide, It is recommended that basic normal maintenance tasks be performed to maintain the good looks of the facade: In coastal areas, a six monthly washdown of expressed joints must be done as per Clause 2.4. Panels are to be washed with clean water only. Detergents and solvents are not to be used. Annual checks and maintenance for the exposed sealant (3mm fillet at horizontal joints, filled vertical and horizontal joints) referenced in Section 7, must be done as required by the sealant manufacturer. As required, clear debris build up against ExoTec RAW s. Maintain sealant as per manufacturer recommendations, to ensure weather seal. Clean out gutters, blocked pipes and overflows as required. In addition to the maintenance requirements set out in this Installation Guide, James Hardie recommends the exterior surfaces are washed every 6 12 months with water. If detergents are used, they should be rinsed off with clean water. To retain the durability and water resistant properties of ExoTec RAW s, James Hardie recommends recoating ExoTec RAW panels with a clear penetrating sealer every 10 years**. ** More frequent re sealing may be required for panels installed in harsher environments, for example, coastal areas, exposure to chemicals or pollutants WARRANTY For Warranty information visit or call James Hardie on RESISTANCE TO FIRE Fire Performance ExoTec RAW s are suitable for use where non combustible materials are required in accordance with C1.9 of the Building Code of Australia. building products have been tested by CSIRO in accordance with AS/NZS 3837 and are classified as conforming to Group 1 material (highest and best result possible), with an average specific extinction area far lower than the permissible 250m2/kg, as referenced in Specification C1.10a of the NCC Fire Rated Walls Both one and two way fire rated wall systems are available with the ExoTec RAW and fixing system. This will depend on the wall configuration and internal materials used. For more information refer to the ExoTec RAW Facade Panel and fixing system FRL External Walls section of the Fire and Acoustic Rated Walls Application Guide which is available at or Ask on EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

11 13 PRODUCT & ACCESSORIES ExoTec RAW FACADE PANEL INFORMATION PRODUCT DESCRIPTION QUANTITY / SIZE (NORMAL) ExoTec RAW Compressed Fibre Cement panel with square edges with a factory clear sealer. Square edge. Factory sealed on all six sides. Nom. density: 1550kg/m3 ExoTec RAW FACADE PANEL INFORMATION Thickness Width Length 9mm 1200mm 2400 (404900) 3000 (404901) PRODUCT DESCRIPTION QUANTITY / SIZE (NORMAL) TOOLS ExoTec A rolled metal section, for use with ExoTec RAW and fixing system, designed to span vertically across the building structure to support s and isolate differential movement of the panels from those of the structure. 124mm wide x 35mm deep x 0.75mm gauge thick. (Approximately) A metal installed vertically for use with ExoTec RAW and fixing system, for intermediate sheet support. 50mm wide x 35mm deep x 0.75mm gauge thick. (Approximately) ExoTec Gasket Snap Strip. 3,620mm Long For use with the ExoTec RAW and fixing system, this gasket snap strip is specially designed to clip into the ExoTec at vertical joins to cover fixings to the structure and to provide an initial weather seal and drainage using a neoprene gasket. Backing Strip.1,190mm, 2390mm, 2990mm A weather seal at horizontal panel joints for use with ExoTec RAW and fixing system and Scyon TM Matrix cladding. Facade Washers Facade washers used for exposed fastener fixing with ExoTec RAW and fixing system and Scyon Matrix cladding. Joint Sealant, 300ml cartridge A general purpose, paintable, exterior grade polyurethane joint sealant. HardieBreak thermal strip Installed behind James Hardie TM external cladding over metal framing and weather barrier. Refer to HardieBreak thermal strip installation guide to determine suitability of HardieBreak for your construction type. Unit size 43 x 12 x 2750mm. A non perforated, highly breathable and reflective safe glare designed to be used behind ExoTec RAW and fixing system to help protect the building. Unit size 2750mm x 30000mm. HardieEdge Trim An architectural slab edge solution fabricated from high quality powder coated aluminium. Unit size: 3950mm. 4 per pack. Part No See right for HardieEdge components. HardieBlade Saw Blade. 185mm diameter A 185mm diameter poly diamond blade for fast and clean cutting of fibre cement. 45 per pack 6,000mm (305948) 7,200mm (305947) 50 per pack 6,000mm (305950) 7,200mm (305949) 10 per pack (305556) 10 per pack 1,190mm (305557) 2,390mm (305558) 2,990mm (305559) 1000 per bag (305565) 20 per box (305534) 45 per pack (305612) 1 Each (305664) Base Trim 4 per pack. (305911) Base Trim Jointer 12 per pack. (305912) Internal Corner 12 per pack. (305913) External Corner 12 per pack. (305914) 1 Each (300660) PRODUCT / ACCESSORIES / TOOLS NOT SUPPLIED BY JAMES HARDIE James Hardie recommends the following products for use in conjunction with ExoTec facade system. James Hardie does not supply these products and does not provide a warranty for their use. Please contact the component manufacturer for information on their warranties and further information on their products. ACCESSORIES DESCRIPTION ACCESSORIES DESCRIPTION Miscellaneous light gauge pressed metal section Sections 1mm minimum to 1.2mm maximum corrosion resistant metal. Used in internal and external corner details. Bond breaker tape Used when filling vertical joints to prevent sealant from bonding to. Refer to the ExoTec RAW and fixing system Technical Specification for suitable sealant. 6mm masonry drill Provides a 6.2mm to 6.3mm diameter hole. Used to pre drill clearance holes for fasteners. Cordless drill Recommended tool for drilling holes and fastening screws. Clear Penetrating Sealer Durable, external grade penetrating sealer suitable for cement based substrates. The following sealers have been tested and are recommended for resealing site cut edges: - Thompson s Water Seal - Crommelin Natural Finish sealer Flexible tape A flexible self adhesive tape used in preparation of a window. Refer to the window installation section in this Technical Specification for more information. EXPOSED HEAD FASTENERS No.10x25mm pan, wafer or hex head self drilling screws Class 3 Minimum coating.* *Higher coating may be required for some applications. Refer to fastener section for more information. FASTENERS RECOMMENDED BY JAMES HARDIE Buildex Hex Head Metal Screw: 10G x 25mm Part Number: C4 Buildex Wafer Head Metal Screw: 10G x 24mm Part Number: MP EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 11

12 14 DETAILS Various details outlined below are available on pages These details are also available in CAD format at ExoTec and gasket snap strip spacing, refer to table 1 in the ExoTec RAW facade system Technical Specification Installation of is mandatory Jame Hardie Fix above backing strip 100 nom. typ ExoTec backing strip 50 typ. high backing strip Timber framing in accordance with AS1684. s affixed to framing members in accordance with recommended span see Table 4. fixing maximum spacing - see Table 3 Edge fixing maximum spacing - see Table 3 Pre drilled fixing holes 10 nom. joint Max. span see Table 1 40 min. 10 nom. joint 100 nom. typ. 900/1200 panel width 40 min. 10 nom. joint BOTTOM SHEET ExoTec RAW FIGURE 1 TYPICAL PANEL AND COMMERCIAL FRAMING LAYOUT ExoTec ExoTec 40 min. 10 nom. joint 40 min. Panel width 9mm Exotec RAW ExoTec gasket snap trip FIGURE 2 TOP HAT AND PANEL FIXING DETAIL 12 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

13 : Refer to ExoTec RAW facade system technical specification for suitable sealant Keep fastener above ExoTec backing strip 10 nom. typ. 100 nom. typ. 100 nom. typ. ExoTec backing strip Continuous horizontal sealant bead 6mm nom. diameter Apply 6mm diameter sealant bead along the backing strip along the expresed joint 3mm continuous sealant fillet to lower panel and within roll for 50mm at each end Bond backing strip to panel with continuous polyurethane sealant 6mm nom. diameter 9mm ExoTec RAW ExoTec or Jame Hardie FIGURE 3 EXOTEC FACADE WASHER FIGURE 5 HORIZONTAL PANEL JOINT DETAIL ExoTec fixing to structure to engineers detail ExoTec and gasket snap strip 9mm ExoTec RAW 40 min. 10 nom. joint 40 min. ExoTec gasket snap strip Joint sealant over bond breaker tape for 4.0kPa and above, refer to ExoTec RAW facade system Technical Specification for suitable sealant 9mm ExoTec RAW FIGURE 4 VERTICAL PANEL JOINT DETAIL FIGURE 6 PANEL JOINTS IN HIGH WIND LOAD AREAS DETAIL EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 13

14 Jame Hardie Allow for structural movement in the weather barrier across joint Sealant over backing rod sized to suit joint Structural joint in structure as required by engineer 0.7mm corrosion resistant metal angle 50 x 30 legs Jame Hardie 150 max. 10 nom. joint Continuous sealant bead FIGURE 7 VERTICAL STRUCTURAL JOINT DETAIL (ONLY FOR COMMERCIAL/MULTI RESIDENTIAL BUILDINGS) Masonry wall Purpose made stop end Step flashing Masonry wall Sealant around stop end Step flashing C C Sealant bead Joint sealant over bond breaker tape for 4.0kPa and above, refer to ExoTec RAW facade system Technical Specification on suitable sealant. 10 FIGURE 8 ELEVATION STEP FLASHING INTO MASONRY WALL FIGURE 9 SECTION CC (ONLY FOR COMMERCIAL/MULTI RESIDENTIAL BUILDINGS) 14 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

15 Insert over and under step flashing ExoTec or Jame Hardie Pop rivets A 150 min. upstand Specified creep +5mm 9mm ExoTec RAW 3mm continuous sealant fillet 10 min. overlap A Sealant beads Step flashing Specified creep +5 ExoTec B Pop rivet Continuous sealant bead nom. B Pop rivets Step flashing FIGURE 10 HORIZONTAL STRUCTURAL JOINT DETAIL (ONLY FOR COMMERCIAL/MULTI RESIDENTIAL BUILDINGS) FIGURE 12 SECTION BB (ONLY FOR COMMERCIAL/MULTI RESIDENTIAL BUILDINGS) Pop rivets Sealant beads Gap to accommodate deflection - to be specified by the project engineer Concrete slab Drip groove 40mm lap COLORBOND flashing Support angle weather barrier Joint sealant over bond breaker foam tape, refer to ExoTec RAW facade system Technical Specification on suitable sealant ExoTec Step flashing fixing to structure to engineers detail ExoTec or 9mm ExoTec RAW Angle fixed to slab soffit continuous sealant bead FIGURE 11 SECTION AA (ONLY FOR COMMERCIAL/MULTI RESIDENTIAL BUILDINGS) FIGURE 13 WALL DEFLECTION UNDER SLAB Figure may also be adopted for timber frame construction. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 15

16 Concrete slab 9mm ExoTec RAW ExoTec or Open joint to allow moisture to escape 50mm overhang Extend ExoTec gasket snap strip the length of the ExoTec RAW overhang Open joint to allow moisture escape Nominal 6mm Metal flashing behind ExoTec to edge of slab 150mm min. upstand Alternative Detail: For more information on HardieEdge please refer to the HardieEdge installation guide available at Metal flashing behind ExoTec sealed to edge of slab150mm min.upstand 9mm ExoTec RAW ExoTec or Open joint to allow moisutre escape Nominal 6mm 75mm HardieEdge trim Sealant Concrete slab FIGURE 14 WALL BASE TYPICAL DETAIL 1 FIGURE 15B WALL BASE TYPICAL DETAIL 1 WITH Z Figure may also be adopted for timber frame construction. 9mm ExoTec RAW ExoTec or Open joint to allow moisutre escape Nominal 6mm Metal flashing behind ExoTec sealed to edge of slab 150mm min. upstand Sealant Concrete slab 9mm ExoTec RAW 50mm max. 15 overhang ExoTec gasket snap strip Flashing behind ExoTec or 150mm min. upstand Soffit framing Soffit lining Open joint to allow moisture to escape Nominal 6mm FIGURE 15A WALL BASE TYPICAL DETAIL 2 FIGURE 16 TYPICAL SOFFIT DETAIL Figure may also be adopted for timber frame construction. 16 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

17 Residential timber frame (nogging support) 9mm ExoTec RAW Min. 75 x 75mm L section 1mm min. thick corrosion resistant metal angle Continuous sealant bead Structure rigid at corners, e.g. bolted together spacing 40 min. spacing min. 1mm min. thick corrosion resistant metal angle Min. 75 x 75mm L section 1mm min. thick corrosion resistant metal angle 9mm ExoTec RAW 10 nom. joint Continuous bead of sealant fixing to structure to engineers detail FIGURE 17 EXTERNAL CORNER DETAIL TIMBER FRAME FIGURE 19 INTERNAL CORNER DETAIL (GIRT SUBSTRUCTURE) Figure may also be adopted for timber frame construction. 40min Residential timber frame 9mm ExoTec RAW Continuous bead of sealant Min. 75 x 75mm L section 1mm min. thick corrosion resistant metal angle 9mm ExoTec RAW spacing fixing to structure to engineers detail Structure rigid at corners e.g bolted together 1mm min. thick corrosion resistant metal angle James Hardie 40 min. Continuous sealant bead 10 nom. joint spacing Nominal 1mm thick corrosion resistant metal 75 x 75 angle FIGURE 18 INTERNAL CORNER DETAIL TIMBER FRAME FIGURE 20 EXTERNAL CORNER DETAIL (GIRT SUBSTRUCTURE) Figure may also be adopted for timber frame construction. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 17

18 Max. 50% of spacing 9mm ExoTec RAW 12 Across face 40 min. 40 min. fixing to structure to engineers detail Structure rigid at corners, e.g. bolted together Continuous sealant bead 1mm corrosion resistant metal angle Fold tape up behind window trim Tape to sub structure Window sill Metal flashing sealed to underside of window Sealant over backing rod 9mm ExoTec RAW Max. 50% of spacing ExoTec or FIGURE 21 NON SQUARE EXTERNAL CORNER (GIRT SUBSTRUCTURE) Figure may also be adopted for timber frame construction. FIGURE 23 STEEL FRAME WINDOW SILL DETAIL Figure may also be adopted for timber frame construction. over flashing Flashing behind ExoTec 150mm min. upstand continuously taped to side window Supplied by others 60mm 35 mm 25 mm ExoTec or 50 9mm ExoTec RAW Window head flashing Continuous sealant bead 6mm Nominal 9mm ExoTec RAW ExoTec gasket snap strip trimmed to profile Bond breaker tape 10 mm nom. Flexible tape fixing to side of window Pre-finished metal flashing sealed and fastened to window jamb Expressed or alternatively sealant filled joint over bond breaker tape, refer to ExoTec RAW facade system Technical Specification on suitable sealant Double sided tape fixing prefinished metal flashing to back of ExoTec gasket snap strip FIGURE 22 STEEL FRAME WINDOW HEAD DETAIL FIGURE 24 WINDOW JAMB SECTION Figure may also be adopted for timber frame construction. 18 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

19 over flashing 9mm Exotec RAW ExoTec or Window head flashing. Min. 6mm gap between flashing and panel. Continuous bead of joint sealant 9mm ExoTec RAW joint sealant FIGURE 26 RESIDENTIAL WINDOW JAMB SECTION Flexible sub-sill flashing 9mm Exotec RAW ExoTec or Metal hold down clips screw through clearance hole in 9mm ExoTec RAW Pressed metal capping by others with sealed joints corresponding with joint in the facade Positive fall forwards inside face of parapet Hardwood support screw fixed to structural framing FIGURE 25 RESIDENTIAL WINDOW HEAD/SILL DETAIL Capping overlap 50 min. Structure 30 9mm ExoTec RAW ExoTec or Parapet lining FIGURE 27 PARAPET CAPPING DETAIL 1 Figure may also be adopted for timber frame construction. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 19

20 9mm ExoTec RAW 1.0mm corrosion resistant metal angle fixing to structure to engineers detail 10 min. 100 max. 40 min. 10 nom. joint Continuous sealant bead Polyrethane sealant over backing rod sized to suit joint. Refer to ExoTec RAW facade system Technical Specification for suitable sealant. FIGURE 28 PLAN VIEW: STEP FLASHING TO MASONRY WALL fixing to structure to engineers detail Metal angle fixed to wall weather barrier Sealant 150 max. 9mm ExoTec RAW Sealant over bond breaker tape FIGURE 29 PLAN VIEW: ABUTTING TO A MASONRY WALL 20 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

21 15 SAFE WORKING PRACTICES 15.1 WARNING - DO NOT BREATHE DUST AND CUT ONLY IN WELL VENTILATED AREA products contain sand, a source of respirable crystalline silica which is considered by some international authorities to be a cause of cancer from some occupational sources. Breathing excessive amounts of respirable silica dust can also cause a disabling and potentially fatal lung disease called silicosis, and has been linked with other diseases. Some studies suggest smoking may increase these risks. During installation or handling: (1) work in outdoor areas with ample ventilation; (2) minimise dust when cutting by using either score and snap knife, fibre cement shears or, where not feasible, use a HardieBlade Saw Blade (or equivalent) and dust-reducing circular saw attached to an appropriate, well maintained, filtered vacuum; (3) warn others in the immediate area to avoid breathing dust; (4) wear a properly-fitted, approved dust mask or respirator (e.g. P1 or P2) in accordance with applicable government regulations and manufacturer instructions to further limit respirable silica exposures. During clean-up use a vacuum and filter, both of which are well maintained and appropriate for capturing fine (respirable) dust. Alternatively, use wet clean-up methods - never dry sweep. For further information, refer to our installation instructions and Safety Data Sheets available at FAILURE TO ADHERE TO OUR WARNINGS, SAFETY DATA SHEETS, AND INSTALLATION INSTRUCTIONS MAY LEAD TO SERIOUS PERSONAL INJURY OR DEATH. JAMES HARDIE RECOMMENDED SAFE WORKING PRACTICES CUTTING OUTDOORS 1. Position cutting station so wind will blow dust away from the user or others in working area. 2. Position the cutting station in a well-ventilated area. Use a dust reducing circular saw equipped with HardieBlade Saw Blade or comparable fibre cement blade and well maintained vacuum and filter appropriate for capturing fine (respirable) dust. CUTTING INDOORS n Cut only using score and snap, hand guillotine or fibreshears (manual, electric or pneumatic). n Position cutting station in a well-ventilated area. DRILLING/OTHER MACHINING When drilling or machining you should always wear a P1 or P2 dust mask and warn others in the immediate area. IMPORTANT S 1. For maximum protection (lowest respirable dust production) James Hardie recommends always using best practice cutting methods where feasible. 2. NEVER use a power saw indoors. 3. ALWAYS use a circular saw blade that carries the HardieBlade logo or is of at least comparable performance. 4. NEVER dry sweep - Use wet suppression or appropriate vacuum and filter. 5. NEVER use grinders. 6. ALWAYS follow tool manufacturers safety recommendations WORKING INSTRUCTIONS Refer to recommended safe working practices before starting any cutting or machining of product. HardieBlade TM Saw Blade The HardieBlade TM Saw Blade used with a dust-reducing saw is ideal for fast, clean cutting of James Hardie TM fibre cement products. A dustreducing saw uses a dust deflector or a dust collector which can be connected to a vacuum system. When sawing, clamp a straight-edge to the sheet as a guide and run the saw base plate along the straight edge when making the cut HOLE-FORMING For smooth clean cut circular holes: Mark the centre of the hole on the sheet. Pre-drill a pilot hole. Using the pilot hole as a guide, cut the hole to the appropriate diameter with a hole saw fitted to a heavy duty electric drill. For irregular holes: Small rectangular or circular holes can be cut by drilling a series of small holes around the perimeter of the hole then tapping out the waste piece from the sheet face. Tap carefully to avoid damage to sheets, ensuring the sheet edges are properly supported STORAGE AND HANDLING To avoid damage, all James Hardie TM building products should be stored with edges and corners of the sheets protected from chipping. James Hardie TM building products must be installed in a dry state and protected from rain during transport and storage. The product must be laid flat under cover on a smooth level surface clear of the ground to avoid exposure to water, moisture, etc QUALITY James Hardie conducts stringent quality checks to ensure any product manufactured falls within our quality spectrum. It is the responsibility of the builder to ensure the product meets aesthetic requirements before installation. James Hardie will not be responsible for rectifying obvious aesthetic surface variations following installation. EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 21

22 S 22 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE

23 EXOTEC RAW FACADE PANEL AND FIXING SYSTEM INSTALLATION GUIDE 23

24 For information and advice call jameshardie.com.au Australia October James Hardie Australia Pty Ltd ABN and denote a trademark or registered mark owned by James Hardie Technology Limited.