VERIFICATION OF INDEX MEMBRANES FOR HITCHINS NEW ...

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10.0 OUTBREAK OF FIRE 10.1 Separation or protection must be provided to the membranes and plywood substrate from heat sources such as flues and chimneys. 10.2 NZBC Acceptable Solution C/AS1 Part 9 and Verification Method C/VM1 provide methods for separation and protection of combustible materials from heat sources. 11.0 SPREAD OF FIRE 11.1 The membranes may be used on roofs of buildings intended for all Purpose Groups, including SC and SD, subject to the requirements of NZBC Acceptable Solution C/AS1 Part 7, Paragraph 7.11.1. 11.2 The membranes may be used for cladding fire-rated roof construction, providing the roof construction complies with the requirements of NZBC Acceptable Solution C/AS1 Part 7. 12.0 EXTERNAL MOISTURE 12.1 INDEX Roofing Membranes, when installed in accordance with the Technical Literature, will provide a roof that will shed precipitated water and melted snow, and prevent the penetration of water that could cause undue dampness or damage to building elements. 12.2 The membrane systems must be installed and maintained in a weatherproof state at a minimum recommended fall of 1:50. All membrane joints must be as detailed in the Technical Literature. 12.3 At penetrations, the membrane must be raised to a level above that of any possible ponding that may be caused by blockage of roof drainage facilities. 12.4 Side laps must be a minimum of 100mm and end laps must be a minimum of 150mm. All laps joints must be torch sealed and staggered. 12.5 Provisions for Snow Specific weather tightness design for preventing the ingress of snow melt water is required in accordance with the requirements of NZBC Acceptable Solution E2/AS1 February 2005 Paragraph 1.3. 13.0. INTERNAL MOISTURE 13.1 The impermeability of the membranes requires that consideration must be given to the effective control of moisture in the roof structure, and closed-in construction spaces under the membrane must have adequate ventilation to prevent the accumulation of moisture venting and vapour barrier requirements will depend on the level of moisture that is present in the construction at the time of the installation, the value of the ceiling/roof construction, and the type of occupancy. Joyce Group Limited Page 12
14.0 INSTALLATION INFORMATION 14.1 Installation Skill Level Requirement. Installation of membranes must be completed by Hitchins New Zealand Limited trained and approved applicators. 15.0 SYSTEM INSTALLATION 15.1 Substrate Preparation All surfaces must be checked to ensure they are clean and dry, smooth and free from sharp edges, loose or foreign materials, oil, grease or other deleterious materials that may affect adhesion of the membranes or may damage the membranes. 15.2 A concrete surface is acceptable if no bumps greater than 10mm are found under a 2m rule in any direction and no bumps greater than 3mm are found under a rule of 0.20m. The surface should be trowelled and all cracks and gaps should be filled with mortar. Any projections and site residue such as nails, sheeting, bits of wood etc. must be removed. 15.3 17.5mm plywood must be fixed using glue and 55mm long stainless steel counter sink head screws only, at 150mm centres on perimeter and 300mm centres throughout the sheets. Sheets must have 3mm gaps between joints except where tongue-in-groove joints are used. Plywood must be laid in a brick bond pattern with the face grain at right angles to the main support forming with grain going in one direction. A 20mm triangular fillet shall be used at the base of any 90º upstand and external edges shall be chamfered with a minimum radius of 5mm. 15.4 20mm compressed sheet must be fixed using glue and 55mm to 60mm x 10 gauge stainless steel Pozidrive Comsheet screws at 200mm centres. Sheets must be laid across the joists and the installation procedure shall be in accordance with the specific instruction of the manufacturer of the sheet. 15.5 Plywood and framing at the time of membrane application must have a maximum moisture content of 20% or lower if specified by the plywood manufacturer. 15.6 The relative humidity of the concrete must be 75% or less before laying the membrane. Concrete slabs can be checked for dryness by using a hygrometer. 15.7 Priming Prior to the application of membrane all plywood sheet faces, edges and fillets must be primed at a rate of 5m² per litre. Concrete surfaces should also be primed. Joyce Group Limited Page 13
Page 1 and 2: VERIFICATION OF INDEX MEMBRANES FOR
Page 3 and 4: 18. BUILDING REGULATIONS 19. QUALIT
Page 5 and 6: INDEX or finishing membranes are ei
Page 7 and 8: 4.0 DESIGN INFORMATION 4.1. Typical
Page 9 and 10: 5.8.2 To dry surface apply Hitchins
Page 11: As a result, premature failure may
Page 15 and 16: The approved applicator and buildin
Page 17 and 18: Appendix 1 PRODUCT PERFORMANCE WARR
Page 19 and 20: MARKETING OF QUALITY PRODUCTS The f
Page 21: Appendix 2 QUALITY CONTROL SCHEDULE
Page 24 and 25: INDEX BITUMEN ROOFING MEMBRANE SYST
Page 26: HITCHINS’ INDEX DETAIL DRAWINGS I
Page 53: Appendix 4 (continued) WELLINGTON C

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