NOVAtherm: World-leading thermal and acoustic insulation

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1.	GENERAL
	SCOPE This section consists of the supply and installation of the following polyester fibre insulation systems: Wall insulation, friction-fitted Ceiling insulation, loose-laid Timber roof insulation, friction-fitted Profiled metal roofing insulation, with roofing fixed through insulation Roof insulation cut between steel purlins, supported on catenary wires Documents
1.2	DOCUMENTS REFERRED TO
	Documents referred to in this section are: NZBC H1/AS1 Energy efficiency, 2.0 Building thermal envelope NZS 4218 Energy efficiency – Housing and small building envelope NZS 4220 Energy conservation in non-residential buildings NZS 4222 Materials for the thermal insulation of buildings NZS 4243 Energy efficiency in large buildings BRANZ Bulletin 357: Thermal insulation of houses BRANZ Bulletin 368: Preventing moisture problems in timber framed skillion roofs BRANZ Bulletin 427: Improving thermal insulation Documents listed above and cited in the clauses that follow are part of this specification. However, this specification takes precedence in the event of it being at variance with the cited document.
1.3	MANUFACTURER’S DOCUMENTS
	Manufacturer’s and supplier’s documents relating to work in this section are: Insulpro Manufacturing Ltd Lab and Site Test Results April 2004. Copies of the above, and other relevant literature are available by phoning Insulpro Manufacturing Ltd 09 273 2308, fax 09 273 2309, 021 892 104 Godfrey Hall.
2.	PRODUCTS
	Materials
	Wall insulation
2.1	POLYESTER THERMAL INSULATION - TIMBER STUD 90/94mm exterior walls:
	NOVAtherm R 1.8 , hollow polyester fibre insulation, 100mm nominal thickness, R 1.8 m².°C/W (Insulpro Manufacturing Ltd 09 273 2308) 580mm or 380mm wide for studs at 600mm or 400mm crs or custom width, cut or ripped on site to suit nog-spacing, friction-fitted.
2.2	POLYESTER THERMAL INSULATION – TIMBER STUD 140/144mm exterior walls:
	NOVAtherm R 2.4, hollow polyester fibre insulation, 145mm nominal thickness, R 2.4 m².°C/W (Insulpro Manufacturing Ltd 09 273 2308) 580mm or 380mm wide for studs at 600mm or 400mm crs or custom width, cut or ripped on site to suit nog-spacing, friction-fitted.
2.3	POLYESTER THERMAL INSULATION – STEEL STUD 89/92mm walls:
	NOVAtherm R 1.8, hollow polyester fibre insulation, 100mm nominal thickness, R 1.8 m².°C/W (Insulpro Manufacturing Ltd 09 273 2308) 600mm or 400mm wide for studs at 600mm or 400mm crs or custom width, cut or ripped on site to suit nog-spacing, friction-fitted inside the steel studs. (Do not use 65mm steel studs to exterior walls because the insulation standard will be too low, and do not use steel studs without thermal isolators.)
2.4	THERMAL ISOLATOR TO STEEL STUDS wherever the stud cavity is insulated:
	12mm high density polystyrene, or 50 x 12mm H3.1 LOSP treated timber, or similar thermal isolator, glued to the outside face of all studs and nogs before cladding.
	Ceiling insulation
2.5	POLYESTER THERMAL INSULATION BLANKET laid between ceiling framing or between trusses:
	NOVAtherm R 2.4 145mm nominal thickness, R 2.4 m².°C/W NOVAtherm R 2.5 160mm nominal thickness, R 2.5 m².°C/W NOVAtherm R 3.0 180mm nominal thickness, R 3.0 m².°C/W NOVAtherm R 3.2 200mm nominal thickness, R 3.2 m².°C/W Hollow polyester fibre insulation blanket (Insulpro Manufacturing Ltd 09 273 2308) 580mm or 880mm wide for framing at 600mm or 900mm crs or custom width, loose-laid on ceiling battens and between truss chords.
	Roof insulation friction fitted
2.6	POLYESTER THERMAL INSULATION in timber framed membrane roofs and timber skillion roofs:
	NOVAtherm R 2.0 120mm nominal thickness, R 2.0 m².°C/W, or NOVAtherm R 2.2 130mm nominal thickness, R 2.2 m².°C/W, or NOVAtherm R 2.4 145mm nominal thickness, R 2.4 m².°C/W, or NOVAtherm R 2.5 160mm nominal thickness, R 2.5 m².°C/W Hollow polyester fibre insulation blanket (Insulpro Manufacturing Ltd 09 273 2308) 580mm wide for framing at 600mm crs or custom width, cut or ripped on site to suit blocking-spacing, friction-fitted. Leave 25mm minimum air gap above insulation for ventilation and condensation control.
	Roof insulation over purlins
2.7	SAFETY MESH support for insulation:
	Ausmesh 300 300mm x 150mm mesh x 2mm gauge galvanised steel wire safety mesh to AS/NZS 4389, in 1.800m x 50m rolls, laid across purlins and draped to allow for proper lofting of the insulation, or stretched taught when timber thermal purlin-packers are used over mesh.
2.8	WIRE NETTING support for insulation:
	Hurricane (Hurricane Wire Products) or Bay-O-Net (Paul Industries Ltd) galvanised hexagon 75mm or 50mm mesh, 1mm diameter galvanised steel wire, 900mm or 2m wide, laid across purlins and draped to allow for proper lofting of the insulation. Note: This product is not accepted as a safety mesh.
2.9	REFLECTIVE FOIL VAPOUR BARRIER – FIRE RETARDANT
	Aluminium sheet, kraft paper fibre reinforced laminates to NZS 4222, part 4 and fitted to NZS 4218. Gib Antiblaze 760 240g/m² fire-retardant medium weight 2-way reinforced foil vapour barrier Gib Antiblaze 990 390g/m² fire-retardant heavyweight 2-way reinforced foil vapour barrier Thermafoil 730 Fire Retardant Medium Weight Aluminium Foil 370g/m² fire-retardant heavy weight 3-way reinforced foil vapour barrier Thermafoil 731 Fire Retardant Light Weight Aluminium Foil 285g/m² fire-retardant medium weight 3-way reinforced foil vapour barrier Tasman Flamestop 520 280g/m² fire-retardant 3-way reinforced foil vapour barrier Tasman Flamestop 524 195g/m² fire-retardant 3-way reinforced foil vapour barrier
2.10	WHITE-FACED VAPOUR BARRIER – FIRE RETARDANT
	Gib Antiblaze Whitecap Medium Weight 310g/m² fire-retardant medium weight 2-way reinforced foil vapour barrier, white polyethylene faced. Light reflectance 0.76 Gib Antiblaze Whitecap Heavy Weight 380g/m² fire-retardant heavyweight 2-way reinforced foil vapour barrier, faced with white polyethylene. Light reflectance 0.76 Thermoplast 980 Fire Retardant Medium Weight Light Diffuser 370g/m² fire-retardant heavyweight 3-way reinforced foil vapour barrier with one face matt white polymeric
2.11	POLYESTER THERMAL INSULATION BLANKET laid on foil or white-faced vapour barrier on wire mesh or safety mesh over steel purlins, with the roofing fixed through the insulation:
	NOVAtherm R 1.5 50mm nominal thickness, R 1.5 m².°C/W, or NOVAtherm R 1.8 75mm nominal thickness, R 1.8 m².°C/W Hollow polyester fibre insulation blanket (Insulpro Manufacturing Ltd 09 273 2308) 1200mm wide, loose-laid on galvanised steel wire netting or Ausmesh 300 x 150 x 2mm safety mesh, draped to allow for lofting the insulation.
2.12	TIMBER THERMAL PURLIN-PACKERS
	Pinus radiata 100 x 75 H.1.2 treated timber thermal isolator and purlin-packer, screw-fixed to steel purlin over wire mesh and foil, to allow the insulation to loft for full thermal performance. The roofing will be screw-fixed to the timber purlin-packer.
2.13	POLYESTER THERMAL INSULATION BLANKET loose-laid between timber thermal purlin-packers on foil or white-faced vapour barrier, on wire netting or safety mesh stretched taut:
	NOVAtherm R 2.0 120mm nominal thickness, R 2.0 m².°C/W NOVAtherm R 2.2 130mm nominal thickness, R 2.2 m².°C/W Hollow polyester fibre insulation blanket (Insulpro Manufacturing Ltd 09 273 2308) 1160mm wide for timber purlin packers at 1200mm crs or custom width, loose-laid on foil or white-faced vapour barrier or mesh, between timber purlin-packers.
	Roof insulation suspended between steel purlins
2.14	POLYESTER THERMAL INSULATION BLANKET suspended below the roofing between steel purlins and supported on steel catenary wires:
	NOVAtherm R 2.0 120mm nominal thickness, R 2.0 m².°C/W NOVAtherm R 2.2 130mm nominal thickness, R 2.2 m².°C/W NOVAtherm R 2.4 145mm nominal thickness, R 2.4 m².°C/W NOVAtherm R 2.5 160mm nominal thickness, R 2.5 m².°C/W Hollow polyester fibre insulation blanket (Insulpro Manufacturing Ltd 09 273 2308) 1200mm wide for purlins at 1200mm crs or custom width, supported on catenary wires or wire netting fixed to the bottom of steel purlins.
2.15	THERMAL ISOLATOR TO STEEL PURLINS where insulation is suspended between steel purlins:
	12mm high density polystyrene or 50 x 20mm H1.2 LOSP treated timber or similar thermal isolator, glued or screwed to the top of steel purlins before fixing the roofing.
3.	EXECUTION
	Conditions
3.1	STORAGE
	Accept materials undamaged and dry and store in a location that protects them from the weather and damage. Avoid distortion, stretching, puncturing and damage to edges of sheet materials. Do not use damaged sheets.
3.2	HANDLING
	Wear protective clothing as necessary and when handling, avoid delamination or distortion of the rectangular form. Maintain full thickness unless compression is an installation system requirement.
3.3	INSPECTION
	Before starting installation of blankets and pads, check that the location and framing are free from moisture, that the cavities are not interconnected and that mesh, building papers and vapour barriers are in place.
3.4	INSTALL INSULATION
	Lay, install, fit and fix to NZBC acceptable solution H1/AS1 section 2.0 and to the insulation manufacturer’s requirements. Install in housing to NZS 4218.
	Wall insulation
3.5	INSTALL FOIL WALL INSULATION for commercial and industrial buildings with no lining to exterior walls:
	Fix horizontally to inside face of substrate in true alignment, with succeeding sheets overlapping 150 mm. Fix with staples through polyethylene tape to the insulation manufacturer's requirements. Scribe neatly around penetrations and openings to leave no gaps. Keep clean and undamaged until closed in. Close in as soon as possible after fixing.
3.6	INSTALL WALL BUILDING PAPER
	Fix horizontally to outside face of substrate in true alignment, with succeeding sheets overlapping 150 mm. Fix to the building paper manufacturer's requirements. Scribe neatly around penetrations and openings to leave no gaps. Keep clean, undamaged and without visible weather deterioration until closed in.
3.7	FIX POLYTHENE FILM VAPOUR BARRIER
	Fit and fix between insulation and lining with joints lapped and sealed with pressure-sensitive tape.
	Roof insulation
3.8	DRAPED WIRE NETTING OR SAFETY MESH
	Lay mesh at right angles across the purlins. Drape mesh across purlins with enough slack to allow insulation to retain its nominal thickness and full loft between purlins. Fix netting to every purlin to ensure even draping. Tie edges of netting together with galvanised wire clips.
3.9	TAUGHT WIRE NETTING OR SAFETY MESH where timber purlin-packers are used above the mesh in the insulation zone:
	Lay mesh at right angles across the rafters/roof joists. Draw mesh taught across the whole roof and temporarily fix. Tie edges of netting together with galvanised wire clips. The mesh will be permanently fixed under the timber purlin-packers.
3.10	LAY FOIL ROOF INSULATION
	Pre-cut foil to required lengths. Lay horizontally starting at the gutter line with succeeding sheets in true alignment and lapping 150 mm. Carefully scribe around and fit neatly to all penetrations. Keep dry and clean until covered in.
3.11	LAY FOIL OR WHITE-FACED VAPOUR BARRIER
	Pre-cut foil to required lengths. Lay horizontally starting at the gutter line with succeeding sheets in true alignment and lapping 150 mm. Carefully scribe around and fit neatly to all penetrations. Fully seal all laps and all penetrations with adhesive tape. Keep dry and clean until covered.
3.12	FIT POLYESTER FIBRE THERMAL INSULATING BLANKET
	Friction fit between studs. Hand tear across pad to fit nogs and small spaces round penetrations. Leave no gaps and maintain full thickness of blanket over the whole of the installation. Leave a 150 mm gap around recessed light fittings and metal flues. BIB application: Lay blanket in the same direction as and over the mesh/vapour barrier, firmly butting edges together. Tear blanket at end for length. Non-BIB application: Lay blanket parallel to ceiling joists to cover battens, tear end for length.
3.13	FIT POLYESTER FIBRE THERMAL INSULATING PADS
	Friction-fit insulating pads in place to completely fill the whole of the cavities. Cut or rip slightly oversize length for friction fit and tear by hand across pad and fill cavity. Tear to smaller pieces for smaller spaces and around penetrations. Leave no gaps between, and maintain full thickness of the insulating segments over the whole of the installation. Do not cover vents. Leave a 150 mm clear gap around recessed light fittings and metal flues.
	Completion
3.14	CLEAN UP
	Clean up as the work proceeds, so no spare offcuts or any other matter or item remain behind claddings or linings.
3.15	CHECK FOILS
	Ensure foils are dry, clean, bright, undamaged and free of debris before being covered.
3.16	CHECK PAPERS
	Ensure these are dry, clean, undamaged and free of debris before being covered.
3.17	CHECK VAPOUR BARRIERS
	Ensure these form one homogeneous sheet vapour barrier and remain as such throughout the ensuing construction process.
3.18	LEAVE
	Leave work to the standard required by following procedures.
3.19	REMOVE
	Remove debris, unused materials and elements from the site.