If you have pre-customised this work section using the "questions and answers" provided as part of the downloading process, it may be necessary to modify some clauses to suit the final project-specific version.
The section must still be checked and customised to suit the project being specified, by removing any other irrelevant details and adding project-specific details and selections.
For compliance of the building thermal envelope use:
- NZBC H1/AS1 or VM1 Energy Efficiency for all housing & buildings up to 300m²
- NZBC H1/AS2 or VM2 Energy Efficiency for buildings greater than 300m²
The Acceptable Solutions contain a Schedule and a Calculation method & the Verification Methods contain a Modelling method for determining construction R-values required.
This section relates to Jet Stream® MAX glasswool, thermal insulation systems including installation.
It includes:
Modify or extend the above description to suit the project being specified.
NOTE - For projects with acoustic and thermal requirements, use Jet Stream MAX section 4721JS
NOTE - Retrofitting exterior walls or internal firewalls, insulation requires a Building Consent to the Building Act 2004, Schedule 1, Clause 13.
Refer to 4161 UNDERLAYS, FOIL AND DPC for wall underlay and roofing underlay.
Refer to 4711K EARTHWOOL GLASSWOOL INSULATION for infill insulation around recessed light fittings.
Refer to 4711EC ECO INSULATION® GLASSWOOL INSULATION for infill insulation around recessed light fittings.
Include cross references to other sections where these contain related work.
Refer to roofing sections for roofing underlays.
Refer to the general section 1232 INTERPRETATION & DEFINITIONS for abbreviations and definitions used throughout the specification.
The following abbreviations apply specifically to this section:
BIB | Blow In Blanket |
Refer to the general section 1233 REFERENCED DOCUMENTS. The following documents are specifically referred to in this section:
NZBC C/AS1-AS2 | Protection from Fire |
NZBC H1/AS1-AS2 | Energy efficiency |
NZBC H1/VM1-VM2 | Energy efficiency |
Electrical installations (known as the Australian/New Zealand Wiring Rules) | |
Thermal insulation materials for buildings - General criteria and technical provisions | |
AS/NZS 5110 | Recessed Luminaire Barriers |
Fire hazard testing - Test flames - Needle-flame test method - Apparatus, conformity test arrangement and guidance | |
Energy efficiency - Installing bulk thermal insulation in residential buildings |
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.
Delete from the DOCUMENTS clause any document not cited. List any additional cited documents.
H1/AS1 cites NZS 4246 sections 5 Walls, 6 Ceilings & Roofs, 7 Underfloor - Suspended Framed Floors and 10 Concrete Slab-on-Ground Insulation for the installation of insulation in light timber and steel frame residential buildings.
NZS 4246 refers to AS/NZS 60695.11.5 and AS/NZS 60598.2.2 (2001 & 2016). The Electrical (Safety) Regulations 2010 only refer to AS/NZS 60598.2.2:2001.
AS/NZS 3000:2007 is cited in the Electricity (Safety) Regulations 2010, which is cited by NZBC. At the time of writing, however, AS/NZS 3000:2018 is not cited. This section uses both versions where they equally apply, and a date is suffixed where there is a difference e.g. the 2018 version covers most recent technologies. Amend the section if you want to use a particular version or a particular instance (by suffixing with the version date e.g. AS/NZS 3000:2018).
The following are related documents and if referred to in the work section need to be added to the list of DOCUMENTS:
NZBC G6/VM1 | Airborne and impact sound |
Timber-framed buildings | |
Methods of determining the total thermal resistance of parts of buildings | |
Thermal insulation materials for buildings - Part 1: General criteria and technical provisions | |
ISO 16283.1 | Airborne sound insulation |
Insulation of lightweight-framed and solid-timber houses | |
AS/NZS 60598.2.2:2001 | Luminaires- Particular Requirements - Recessed luminaires |
AS/NZS 60598.2.2:2016 | Luminaires- Particular Requirements - Recessed luminaires |
BRANZ BU 461 | Practical sound control |
BRANZ BU 647 | Recessed downlights |
BRANZ BU 660 | Residential walls with high thermal performance |
BRANZ BU 661 | Residential roofs with high thermal performance |
BRANZ BU 668 | Complying with H1 - Housing and Buildings up to 300m² |
BRANZ BU 672 | Specifying floors under H1 |
BRANZ publication | House insulation guide |
Electricity (Safety) Regulations 2010 .
The BRANZ House Insulation Guide provides thermal resistance of common components and is based on calculations from NZS 4214. However, refer to NZBC H1/AS1 or AS2 Appendix E & F to determine the thermal resistance of slab-on-ground floors, windows and doors, the BRANZ House Insulation Guide should not be used due to differences in calculation methods and assumptions.
Manufacturer and supplier documents relating to this part of the work:
CodeMark Certificate: | Jet Stream® MAX and Supafil Cavity Insulation GM-CM-30067-RevB |
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CodeMark Certificate: | Jet Stream® MAX ceiling insulation GM-CM-30068-RevB |
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| Refer to Compliance - CODEMARK CERTIFICATES, for details regarding conditions and limitations - Product Datasheets and Application Guidelines. |
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Jet Stream® MAX Application Guidelines are only available to approved installers.
Manufacturer/supplier contact details
Company: | Knauf Insulation New Zealand |
Web: | |
Email (Technical): | tech.nz@knaufinsulation.com |
Email (Sales): | sales.nz@knaufinsulation.com |
Telephone: | 0800 KNAUFI (562 834) |
It is important to ensure that all personnel on site have access to accurate, up to date technical information on the many products, materials and equipment used on a project. In most cases individual products are not used in isolation, but form part of a building process. Also a particular manufacturer and/or supplier requirements for handling, storage, preparation, installation, finishing and protection of their product can vary from what might be considered the norm. Access to technical information can help overcome this potential problem.
Provide a material manufacturer/supplier warranty:
50 years: For Jet Stream® MAX glasswool materials
Refer to the general section 1237 WARRANTIES for additional requirements.
Modify or expand the clause to suit project or manufacturer/supplier requirements, options include:
Provide an installer/applicator warranty:
1 -year | For installation of insulation |
Refer to the general section 1237 WARRANTIES for additional requirements.
~ years to ~ years are the sort of warranty periods that can be expected depending on material selection and project conditions. Check with the manufacturer/supplier for their specific periods.
Modify or expand the clause to suit project or manufacturer/supplier requirements, options include:
Refer to 1270 CONSTRUCTION for requirements relating to experience, skill, and qualifications.
Substitutions are not permitted to any of the specified systems, components and associated products listed in this section.
Refer to SELECTIONS for location, type, R-Value, and thickness.
Refer to clauses RECESSED LIGHT FITTINGS, and INSULATION CLEARANCES.
Refer to RELATED WORK clause for insulating over recessed light fittings.
NOTE: Loose-fill insulation has specific requirements under AS/NZS 3000, a 100mm gap must be maintained between loose-fill insulation and recessed light fittings therefore no requirement to withstand a 30s Needle Flame test to AS/NZS 60695.11.5
NZBC H1 outlines three methods to show compliance with the insulation requirements in H1: Schedule Method, Calculation Method, and Building Performance Method (BPI).
Refer to MANUFACTURER/SUPPLIER DOCUMENTS for CodeMark certificate numbers.
Jet Stream® MAX meets the requirements of the NZBC when used in accordance with the Conditions and Limitations of its Certificate of Conformity. The following Datasheets and Guidelines are listed in the Conditions and Limitations.
Specify in accordance with: | Blow-in Glasswool Insulation Datasheet, December 2015, Ref: KIAN8414093DS |
| Ceiling Application Guidelines, August 2015, Ref.: KIAN0915233BR |
| Blow-in Glasswool Ceiling Insulation Datasheet, Ref.: KIAN0815220D |
Installation carried out to: | Knauf Application Guidelines - Walls, Floors, and Skillion roofs, December 2015, Ref. KAIN0815225BR |
| Ceiling Application Guidelines, August 2015, Ref.: KIAN0915233BR |
The certificate provides third parties compliance to NZBC Clauses and standards specified within the certificate, provided that installation of the system is in accordance with conditions and limitations of its Certificate of Conformity - Application Guldelines and Datasheets listed in this clause are from the CodeMark conditions and Limitations
Jet Stream® MAX has a high percentage of post-consumer recycled glass content, is rated at zero Ozone Depletion Potential (ODP) and zero Global Warming Potential (GWP).
Jet Stream® MAX loose, unbonded glasswool blow-in insulation for underfloor to NZBC H1/AS1-AS2 and AS/NZS 4859.1. With a thermal conductivity of 0.038W/mK, when installed at a design density of 25kg/m³, the insulation will achieve R-values at various thicknesses to meet requirements of NZBC H1/AS1-AS2.
Refer to SELECTIONS for location, R-value and thickness.
Modify to suit location of insulation. Check condition of substrates particularly for installations in existing floor cavities. Refer to CodeMark GM-CM30067-RevA conditions and limitations, item 6, for floor applications.
Jet Stream® MAX loose, unbonded glasswool blow-in insulation for walls to NZBC H1/AS1-AS2 and AS/NZS 4859.1. With a thermal conductivity of 0.032W/mK, when installed at a design density of 28kg/m³, the insulation will achieve R-values at various thicknesses to meet requirements of NZBC H1/AS1-AS2.
Refer to SELECTIONS for location, R-value and thickness.
Modify to suit location of insulation. Check condition of substrates particularly for installations in existing wall cavities. Install with a nominal density of 28kg/m³.
Jet Stream® MAX loose, unbonded glasswool blow-in insulation for mid-floor to NZBC H1/AS1-AS2 and AS/NZS 4859.1. With a thermal conductivity of 0.038W/mK, when installed at a design density of 25kg/m³, the insulation will achieve R-values at various thicknesses to meet requirements of NZBC H1/AS1-AS2.
Refer to SELECTIONS for location, R-value and thickness.
Modify to suit location of insulation. Check condition of substrates particularly for installations in existing mid-floor cavities. Refer to CodeMark GM-CM30067-RevA conditions and limitations, item 6, for floor applications.
Jet Stream® MAX loose, unbonded glasswool blow-in insulation for ceilings to NZBC H1/AS1-AS2 and AS/NZS 4859.1. With a thermal conductivity of 0.049W/mK and installed with an average density of 8.5 kg/m³ (8-9 kg/m³ range) will achieve R-values that meet the requirements of NZBC H1/AS1-AS2.
Refer to SELECTIONS for location, R-value and thickness.
Modify clause to suit. Note that Jet Stream Max is applied to ceilings at a much lower density than for ceiling cavities.
Jet Stream® MAX loose, unbonded glasswool blow-in insulation for skillion roofs to NZBC H1/AS1-AS2 and AS/NZS 4859.1. With a thermal conductivity of 0.038W/mK, when installed at a design density of 25kg/m³, the insulation will achieve R-values at various thicknesses to meet requirements of NZBC H1/AS1-AS2.
Refer to SELECTIONS for location, R-value and thickness.
Modify to suit location of insulation. Check condition of substrates particularly for installations in existing skillion roof cavities. Refer to CodeMark GM-CM30067-RevA conditions and limitations, item 6, for floor applications.
Blow in Blanket (BIB) is a special mesh fabric used in the installation of Jet Stream® MAX, for walls, floors and skillion roofs. It performs as a substrate for floors or skilion roofs, and retainer for wall cavities.
Refer to 4161 UNDERLAYS, FOIL AND DPC for wire netting used to support the insulation.
Wire netting is used to support roofing underlays, particularly those that are not self supporting. Wire netting must be used to support all types of underlay where the roof has a pitch below 8°.
Refer to 4161 UNDERLAYS, FOIL AND DPC for reflective foil.
Refer to 4161 UNDERLAYS, FOIL AND DPC for vapour barrier.
Rigid substrate guards / barriers that shield certain areas whilst installing Jet Stream® MAX and/or prevent loose-fill insulation contacting recessed luminaires or auxiliary electrical equipment once installed.
Barriers to recessed luminaires (downlights) shall comply with AS/NZS 5110, and AS/NZS 3000, 4.5.2.3.3.e); 4.5.2.3.4c), and figure 4.9.
Jet Stream® MAX density check kits including Pin and Plate, Density Control Kit, Flow Rate bag and spring weighted balance.
Pneumatic blowing machine & associated hoses, coupling and clips in accordance with installation guidelines listed in CODEMARK CERTIFICATE.
Refer to 1270 CONSTRUCTION for requirements relating to delivery. Storage and handling of products.
Use this standard generic clause and if appropriate add additional special requirements.
Do not use damaged or wet insulation material.
The building envelope must be maintained to a weathertight condition to ensure the insulation remains dry. Cavities must be clean and dry before fitting insulation.
Use this standard generic clause and if appropriate add additional special requirements.
Check work previously carried out and confirm it is of the required standard for this part of the work.
Moisture content: | ~% maximum for framing |
Location and framing | are free from moisture, that the cavities are not interconnected |
Discard | Damaged or wet insulation |
Underlays and substrates | - External walls have a Rigid Air Barrier if external cladding is installed over a cavity, or a flexible building wrap if cladding is direct fixed to framing.- Internal walls to have at rigid internal lining to one side. - Mid-floor applications must be constructed with a rigid substrate. - Underfloor applications, a rigid lining to be installed after installation, over the Blow-in Blanket. - Skillion roof applications must be constructed with a rigid substrate at the top of the cavity. |
Vapour Barriers | Ensure vapour barrier forms one homogeneous sheet |
Retrofit walls | Ensure each framed cavity is closed and structurally sound. Building paper or sarking must be present, ensure in good condition. |
Ceiling survey | Ensure suitability and load bearing capacity of the ceiling. Inform Contract Administrator of any concerns. |
Install guards to Underfloors / Mid-floors / Ceilings | Install rigid substrate guards to all plumbing penetrations and pipes to floor and to recessed lighting and auxiliary electrical equipment. Protect eaves and shield ventilation paths as required, protect areas around water tanks, flues, access hatches as per requirements in Jet Stream® MAX: Ceiling Application Guidelines and NZS 4246. Install segment of alternative insulation of the same R-value to ceiling access hatch. Install rigid substrate guards to all recessed lighting and auxiliary electrical equipment in accordance with NZS 4246 and NZBC C/AS1-AS2, unless specifically stated otherwise by luminaire's manufacturer. Ensure all in accordance with the Jet Stream® MAX: Application Guidelines. For residential applications install segment of alternative insulation of the same R-value to recessed light fittings in accordance with NZS 4246. |
Install Blow In Blanket (BIB) | - Exterior walls: either glued or stapled to the internal side of external wall framing. External side of wall to have rigid substrate lining. - Under floors/Midfloor: either glued or stapled to the framing, lining the underside of floor joists.If using open web joists, apply a strip of BIB to the inside face of web to create a closed cavity. - Skillion Roof: either glued or stapled to the framing, lining the underside of roof framing. |
Modify table to suit application.
Refer to RELATED WORK clause for insulation abutting or covering recessed luminaires. For residential applications, infill insulation, to the same R-Value, can be Earthwool® glasswool insulation as it meets the needle flame test to AS/NZS 60695.11.5 and is non-combustible. For recessed light fittings: CA80, CA90 & CA135 insulation to abut fitting, IC, IC-F & IC-4insulation to abut and cover fitting. For non-residential applications and for unmarked recessed light fittings no infill insulation to be installed and clearances to be maintained.
Modify table to suit project requirements
Lay, install, fit and fix insulation without gaps, tucks, folds and over compaction to NZBC H1/AS1 or AS2 and insulation manufacturer's requirements. For all housing and buildings up to 300m², install in accordance to NZS 4246 sections 5 Walls, 6 Ceilings & Roofs, 7 Underfloor - Suspended Framed Floors and 10 Concrete Slab-on-Ground Insulation, for residential light timber or steel framed buildings. Do not cover vents. Refer to manufacturer installation instructions and NZS 4246 for further details.
These standards give minimum building element thermal resistance (R-values). Achieving these will depend on the quality of the insulation.
CAUTION: Electrical cables and equipment partially or completely surrounded with bulk thermal insulation may overheat and fail. This applies to wiring installed prior to 1989.
Machine settings to be in line with the Jet Stream® MAX: Application Guidelines.
Carry out an initial density check in accordance with manufacturer recommendations. Carry out periodic density checks throughout installation. Refer to SELECTIONS for required densities.
Non-residential recessed light fittings to AS/NZS 3000, 4.5.2.3.5;
Refer to clause INSULATION CLEARANCES GENERALLY for clearances.
Insulation abutting or covering recessed downlights must pass the needle flame test to AS/NZS 60695.11.5, as required by AS/NZS 60598.2.2: 2001 (cited in Electrical (Safety) Regulations, Schedule 4).
Note; CA 80, CA135, IC, IC-F & NON-IC are cited in AS/NZS 60598.2.2: 2001. But CA 90, CA135, IC, IC-4 and Do-not Cover, are only in AS/NZS 60598.2.2: 2016, which makes CA 90, IC-4 & Do-not Cover, alternative solutions. However all clearances stated comply with AS/NZS 60598.2.2: 2016 and AS/NZS 3000:2018.
IC-4 due to low/zero air transfer requirements, is generally recommended for unventilated roof spaces, like skillion/compact and Passive House roofs.
Residential recessed light fittings to AS/NZS 3000, 4.5.2.3.5;
Refer to clause INSULATION CLEARANCES GENERALLY for clearances.
Insulation abutting or covering recessed downlights must pass the needle flame test to AS/NZS 60695.11.5, as required by AS/NZS 60598.2.2: 2001 (cited in Electrical (Safety) Regulations, Schedule 4 and NZS 4246).
Note; CA 80, CA135, IC & IC-F are cited in AS/NZS 60598.2.2: 2001. But CA 90, CA135, IC, & IC-4, are only in AS/NZS 60598.2.2: 2016, which makes CA 90 & IC-4 fittings alternative solutions. However all insulation clearances for all the above fittings comply with NZS 4246, which complies with NZBC H1/AS1.
IC-4 due to low/zero air transfer requirements, is generally recommended for unventilated roof spaces, like skillion/compact and Passive House roofs.
Insulation may need to have a gap to some mechanical and electrical services and equipment, including ducts and chimneys. The gaps should be to the NZS 4246 based tables below or to the equipment manufacturer requirements if they require larger gaps. Smaller gaps to manufacturer requirements can be used for equipment specifically manufactured with heat shielding or similar (excludes light fittings). Installed gap not to be more than 50mm bigger than the required gap.
The following tables are subject to:
LIGHT FITTINGS
Type of fitting | Minimum insulation clearance | Comments |
Recessed, marked NON-IC, or unmarked | 100mm(increase if over 100W) | NON-IC fittings and new or old unmarked & unknown fittings, and/or insulation. Secure insulation. |
Recessed, CA 80, CA 90 or CA 135 | Abut fittings | Do NOT cover the fittings |
Recessed, IC, IC-F or IC-4 | Abut & cover fittings | Ensure insulation complies |
Recessed, marked Do-Not-Cover | Manufacturers clearances | Do not cover the fittings |
Independent control gear | Place on top of insulation except loose fill insulation and 50mm from fitting | If not on top allow 50mm clearance to insulation, do not cover. Includes, transformers, ballasts & drivers etc. For loose fill insulation, do not place control gear on insulation. Maintain clearance by placing guard around control gear, refer to NZS 4246 figure 15. |
Surface fittings not exposed to insulation | Nil | Where surface fittings are isolated from insulation by appropriate linings. Excludes high heat fittings. |
Surface fittings & exposed insulation | 200mm | This is exposed insulation to any part of the exposed fitting & bulb/tube (e.g. exposed light in an unlined basement). Secure insulation. For loose fill insulation ensure guard maintains clearance. |
Note; CA 80, CA135, IC, IC-F & NON-IC are cited in AS/NZS 60598.2.2: 2001. But CA 90, CA135, IC, IC-4 and Do-not Cover, are only in AS/NZS 60598.2.2: 2016, which makes CA 90, IC-4 & Do-not Cover fittings, alternative solutions.
However for residential applications all insulation clearances for all the above fittings comply with NZS 4246, which complies with NZBC H1/AS1. But for Non-residential all clearances stated comply with AS/NZS 60598.2.2: 2016 and AS/NZS 3000:2018.
FOR MINIMUM INSULATION CLEARANCES TO INBUILT RECESSED HOT APPLIANCES refer to NZS 4246
INSULATION CLEARANCES FROM EXTRACTS, VENTS, PIPES & ROOF UNDERLAY
Application | Minimum insulation clearance | Comments |
Ducted fan motors | 50mm | Includes ducted rangehoods, extractors etc. Applies to the motor unit and electrical enclosures (not the ducts). For loose fill insulation ensure guard maintains clearance. |
Ducted fan ducts | Abut | Excludes motor unit and electrical enclosures. |
Unducted fan motors usually discharging to ceiling space | 200mm | Includes unducted, rangehoods, extractors etc, discharging into roof space.To prevent debris falling into motor.Clearance may be able to be reduced, by providing a fixed barrier around the vent.For loose fill insulation ensure guard maintains clearance. |
Passive vents (still in use) | 200mm | To prevent debris falling through. Clearance may be able to be reduced, with more cohesive insulation, like some of the rigid plastic types or providing a fixed barrier around the vent.For loose fill insulation ensure guard maintains clearance. |
Plumbing penetrations through floors | 100mm | Keep gap between pipe penetration and floor insulation in case of leaks. For loose fill insulation ensure guard maintains clearance. |
Roofing material/underlay | 25mm | From underside of roofing or flexible roofing underlay, to prevent wicking. |
Note; unducted fans (bathroom & kitchen extracts) and passive vents discharging into ceiling spaces are not recommended and are probably difficult to achieve under the NZBC, but may be encountered in existing buildings.
Modify this whole clause to suit the project requirements.
These tables in part, may repeat some information that is also in other clauses, usually it is not identical and provides further detail. It is an option to delete the repeated information from here or the other related clause if it is necessary, or leave both instances to reinforce the point.
Under floors: either glued or stapled to the framing, lining the underside of floor joists. If using open web joists, apply a strip of BIB to the inside face of web to create a closed cavity.
Install Jet Stream® MAX using pneumatic blowing machine in accordance with the Jet Stream® MAX: Application Guidelines. Refer to CODEMARK CERTIFICATE for datasheets and guidelines.
Refer to SELECTIONS for options.
Wherever practicable, all cavities should be completely filled.
Ensure a rigid external lining is installed as soon as practically after installation of insulation. Battens can be installed after Blow in Blanket (BIB) however ensure any clips and hangers have been installed prior to BIB installation.
Ensure each framed cavity is closed and structurally sound. External side of wall to have rigid substrate lining if installed over a cavity, or a wall underlay underneath the external cladding. Drill installation holes into the internal linings to a specified grid pattern to maximise insulation coverage.
Ensure each framed cavity is closed and structurally sound. External side of wall must have rigid substrate lining if installed over a cavity, or a wall underlay underneath the external cladding. For internal walls, one side of the wall must have a rigid lining to support the BIB.
Either glue or staple the BIB to the internal side of external wall framing.
BIB may be required for retrofitting walls where significant areas of internal wall linings are removed.
Install Jet Stream® MAX using pneumatic blowing machine in accordance with the Jet Stream® MAX: Application Guidelines. Refer to CODEMARK CERTIFICATE for datasheets and guidelines.
Refer to SELECTIONS for options.
Wherever practicable, all cavities should be completely filled.
Ensure a rigid external lining is installed as soon as practically after installation of insulation. Ceiling battens to be installed after Blow in Blanket (BIB) however ensure any clips and hangers have been installed prior to BIB installation.
Installation holes must be filled using a filler compatible with the wall linings and their finishes.
Under floors: either glued or stapled to the framing, lining the underside of floor joists. If using open web joists, apply a strip of BIB to the inside face of web to create a closed cavity.
Install Jet Stream® MAX using Pneumatic blowing machine in accordance with the Jet Stream® MAX: Ceiling Application Guidelines.
Refer to CODEMARK CERTIFICATE for datasheets and guidelines, and SELECTIONS for location, density, R-Value, and thickness.
Wherever practicable, all cavities should be completely filled.
Ensure a rigid external lining is installed as soon as practically after installation of insulation. Ceiling battens to be installed after Blow in Blanket (BIB) however ensure any clips and hangers have been installed prior to BIB installation.
Ensure suitability and load bearing capacity of the ceiling. Inform Contract Administrator of any concerns. Drill holes in ceiling lining to specified grid pattern to Application Guidelines.
Ceiling lining must be installed prior to installation: Ensure suitability and load bearing capacity of ceiling. Inform Contract Administrator of any concerns.
Install Jet Stream® MAX using Pneumatic blowing machine in accordance with the Jet Stream® MAX: Application Guidelines. Maintain a minimum clearance of 25mm between the insulation and the roofing underlay, to NZS 4246 clause 6.2.10, except where a solid timber (or plywood) substrate is installed under the roof cladding system.
Refer to CODEMARK CERTIFICATE for datasheets and guidelines.
Refer to SELECTIONS for options:
The 25mm clearance is to prevent wicking. Should this gap need to be reduced, it will be Specific Design.
Wherever practicable, all cavities should be completely filled.
In some cases, ceiling access may limit ability to install insulation in accordance with manufacturer guidelines. Generally, it is likely it will be installed at a greater density than required in these locations, which will increase R-value. If required, contact Knauf insulation for further advice.
Options for installing into hard to fill ceiling areas - use BIB as a substrate where necessary or install through installation holes. Ensure a 25mm air gap is maintained between insulation and underside of roofing underlay, or sarking.
Install Jet Stream® MAX using Pneumatic blowing machine in accordance with the Jet Stream® MAX: Application Guidelines. Maintain a minimum clearance of 25mm between the insulation and the roofing underlay, to NZS 4246 clause 6.2.10, except where a solid timber (or plywood) substrate is used under the roof cladding.
Refer to CODEMARK CERTIFICATE for datasheets and guidelines.
Refer to SELECTIONS for options:
This is to prevent wicking. Should the 25mm insulation gap need to be reduced, it will be specific design.
Note that some roofs may require a ventilation gap under a solid timber substrate.
Modify clause to suit project requirements.
Install Jet Stream® MAX using Pneumatic blowing machine in accordance with the Jet Stream® MAX: Application Guidelines. Maintain a minimum clearance of 20mm between the underside of the substrate (plywood etc) and any insulation to NZBC E2/AS1 clause 8.5.2
Refer to CODEMARK CERTIFICATE for datasheets and guidelines.
Refer to SELECTIONS for options:
Should the 20mm insulation gap need to be reduced, it will no longer be an Acceptable Solution but an Alternative Solution.
Modify clause to suit project requirements.
Wherever practicable, all cavities should be completely filled.
Ensure a rigid external lining is installed as soon as practically after installation of insulation. Ceiling battens to be installed after Blow in Blanket (BIB) however ensure any clips and hangers have been installed prior to BIB installation.
Refer to 1270 CONSTRUCTION for completion requirements and if required commissioning requirements.
Jet Stream® Max packaging is recyclable.
Use this standard generic clause and if appropriate add additional special requirements.
For further details on selections go to products www.knaufinsulation.co.nz
Substitutions are not permitted to the following, unless stated otherwise.
If substitutions are permitted modify the statement above, ensure the NO SUBSTITUTIONS clause from GENERAL is treated the same.
Select the options to suit the project and delete options not specified.
Location: | ~ |
Brand: | Jet Stream® MAX |
Design Density: | 25 kg/m³ |
R-value: | R ~ |
Thickness: | ~ mm |
Accessories | ~ |
Options:
R-value (at 25 kg/m³ density): | Thickness: |
R2.6 | 100 mm |
R3.6 | 140 mm |
R5.0 | 190 mm |
R6.3 | 200 mm |
Accessories: | Rigid substrate guards to plumbing penetrations and pipework to sub-floor, to protect recessed luminaires, auxiliary electrical items and other fixtures to floors as required. Blow-In-Blanket (BIB) |
Recessed Luminaires | Infill insulation: Earthwool® glasswool insulation ceiling segment to equivalent R-value for recessed luminaires. |
Location: | ~ |
Brand: | Jet Stream® MAX |
Design Density: | ~ kg/m³ |
R-value: | R~ |
Thickness: | ~mm |
Accessories: | ~ |
Options:
R-value: (at 28kg/m³) | Thickness - for new buildings |
R2.3 | 75 mm |
R2.8 | 90 mm |
R3.1 | 100 mm |
R4.3 | 140 mm |
R5.9 | 190 mm |
R7.5 | 240 mm |
R9.1 | 290 mm |
|
|
R-value (at 25kg/m³): | Thickness - for retrofitting buildings |
R2.3 | 90 mm |
R2.6 | 100 mm |
R3.6 | 140 mm |
R5.0 | 190 mm |
R6.3 | 240 mm |
|
|
Accessories: | Rigid substrate guards to plumbing penetrations and pipework to sub-floor, to protect recessed luminaires, auxiliary electrical items and other fixtures to floors as required. Blow-In-Blanket (BIB) |
Recessed Luminaires | Infill insulation: Earthwool® glasswool insulation ceiling segment to equivalent R-value for recessed luminaires. |
Location: | ~ |
Brand: | Jet Stream® MAX |
Design Density: | ~ kg/m³ |
R-value: | R ~ |
Thickness: | ~ mm |
Accessories: | ~ |
Options:
R-value: (at 28 kg/m³) | Thickness - for new buildings |
R2.3 | 75 mm |
R2.8 | 90 mm |
R3.1 | 100 mm |
R4.3 | 140 mm |
R5.9 | 190 mm |
R7.5 | 240 mm |
R9.1 | 290 mm |
|
|
R-value (at 25 kg/m³): | Thickness - for retrofitting buildings |
R2.3 | 90 mm |
R2.6 | 100 mm |
R3.6 | 140 mm |
R5.0 | 190 mm |
R6.3 | 240 mm |
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Accessories: | Rigid substrate guards to plumbing penetrations and pipework to sub-floor, to protect recessed luminaires, auxiliary electrical items and other fixtures to floors as required. Blow-In-Blanket (BIB) |
Recessed Luminaires | Infill insulation: Earthwool® glasswool insulation ceiling segment to equivalent R-value for recessed luminaires. |
Location: | ~ |
Brand: | Jet Stream® MAX |
Average Density: | 8.5 kg/m³ (8-9 kg/m³ range) |
R-value: | R ~ |
Thickness: | ~ mm |
Accessories: | ~ |
Options:
R-value (8.5 kg/m³ density): | Thickness: |
R3.2 | 160 mm |
R3.6 | 180 mm |
R4.1 | 205 mm |
R5.2 | 255 mm |
R6.3 | 310 mm |
R7.3 | 360 mm |
R8.4 | 410 mm |
R9.4 | 460 mm |
R10.4 | 510 mm |
Accessories: | Rigid substrate guards to protect recessed luminaires, auxiliary electrical items and other fixtures as required. Blow-In-Blanket (BIB) |
Recessed Luminaires | Infill insulation: Earthwool® glasswool insulation ceiling segment to equivalent R-value for recessed luminaires. |
Note: NZBC H1/AS1-AS2, 2.1.2 Schedule Method, for roofs with a roof space where the insulation is installed over the horizontal ceiling, the minimum construction R-values for a roof in all climatic zones may be reduced to R3.3 for a distance of up to 500mm from the outer edge of the ceiling perimeter where space restrictions do not allow full-thickness insulation to be installed.
Location: | ~ |
Brand: | Jet Stream® MAX |
Design Density: | ~ kg/m³ |
R-value: | R ~ |
Thickness: | ~mm |
Accessories | ~ |
Options:
R-value: | Thickness: | Density (25 kg/m³ or 28 kg/m³): |
R2.6 | 100 mm | 25 kg/m³ |
R3.1 | 100 mm | 28 kg/m³ |
R3.6 | 140 mm | 25 kg/m³ |
R4.3 | 140 mm | 28 kg/m³ |
R5.0 | 190 mm | 25 kg/m³ |
R6.3 | 200 mm | 25 kg/m³ |
Accessories: | Rigid substrate guards to plumbing penetrations and pipework to sub-floor, to protect recessed luminaires, auxiliary electrical items and other fixtures to floors as required. Blow-In-Blanket (BIB) |
Recessed Luminaires | Infill insulation: Earthwool® glasswool insulation ceiling segment to equivalent R-value for recessed luminaires. |
Location: | ~ |
Brand: | Jet Stream® MAX |
Design Density: | ~ kg/m³ |
R-value: | R ~ |
Thickness: | ~mm |
Accessories | ~ |
Options:
R-value: | Thickness: | Density (25 kg/m³ or 28 kg/m³): |
R2.6 | 100 mm | 25kg/m³ |
R3.1 | 100 mm | 28kg/m³ |
R3.6 | 140 mm | 25kg/m³ |
R4.3 | 140 mm | 28kg/m³ |
R5.0 | 190 mm | 25kg/m³ |
R6.3 | 200 mm | 25kg/m³ |
Accessories: | Rigid substrate guards to plumbing penetrations and pipework to sub-floor, to protect recessed luminaires, auxiliary electrical items and other fixtures to floors as required. Blow-In-Blanket (BIB) |
Recessed Luminaires | Infill insulation: Earthwool® glasswool insulation ceiling segment to equivalent R-value for recessed luminaires. |