Refer to ~ for ~

Refer to 4161 UNDERLAYS, FOIL AND DPC for underlays, foil, DPC and for wire netting used to support insulation.

Refer to the general section 1232 INTERPRETATION & DEFINITIONS for abbreviations and definitions used throughout the specification.

The following abbreviations apply specifically to this section:

Refer to the general section 1233 REFERENCED DOCUMENTS.  The following documents are specifically referred to in this section:

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.

Manufacturer and supplier documents relating to this part of the work:

Earthwool® glasswool Insulation Technical Data Sheets

Earthwool® glasswool Insulation Material Safety Data Sheets

Earthwool® glasswool Insulation Installation Instructions

BRANZ Appraisal 648 (2022) - Knauf Glasswool Insulation

Manufacturer/supplier contact details

Provide a warranty for:

• Provide this warranty on the manufacturer/supplier standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT)
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for additional requirements.

Provide an installer/applicator warranty:

• Provide this warranty on the installer/applicator standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT).
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for additional requirements.

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.

Provide sound rated systems as detailed in SELECTIONS.

Site testing of each sound rated element (wall, ceiling etc), where required, will be carried out by the element system provider, to NZBC G6/VM1, using a nominated acoustic consultant.  Coordinate with element provider to rectify any element that does not meet the specified STC/IIC figure due to insulation issues.

Refer to the appropriate wall/ceiling system sections that require sound ratings.

Exposed acoustic blanket and/or bafflestacks in ceilings spaces forming air handling plenums, to have a Group Number to NZBC C/AS2, Table 4.4.

Insulation of HVAC ducts to have a Group Number to NZBC C/AS2, Table 4.4.

Earthwool® glasswool insulation is deemed non-combustible in accordance with AS 1530.1 and non-combustible to test criteria under the 30's Needle Flame Test to AS/NZS 60695.11.5.

Earthwool® glasswool insulation meets the requirements of the NZBC when used in accordance with the conditions and limitations of its Certificate of Conformity CMNZ30095.

Earthwool® glasswool insulation: Wall, non-combustible and certified Red List Free glasswool insulation segments to AS/NZS 4859.1, manufactured using up to 80% recycled glass with DriTherm® silicone treatment, ECOSE® Technology plant-based binder and TwinTech® smooth finish on both faces.  Suitable for acoustic applications to NZBC G6/AS1.  Available in a range of segment sizes, thicknesses, acoustic value, density and R-value.  Refer to SELECTIONS.

Earthwool® glasswool insulation: Ceiling, non-combustible and certified Red List Free glasswool insulation segments to AS/NZS 4859.1, manufactured using up to 80% recycled glass with DriTherm® silicone treatment, ECOSE® Technology plant-based binder and TwinTech® smooth finish on both faces.  Suitable for acoustic applications to NZBC G6/AS1.  Available in ceiling and skillion roof variations in a range of segment sizes, thicknesses, acoustic value, density and R-values.  Refer to SELECTIONS.

Knauf Insulation: Multi-use Roll, non-combustible glasswool insulation rolls to AS/NZS 4859.1, manufactured using up to 80% recycled glass with DriTherm® silicone treatment, ECOSE® Technology plant-based binder and TwinTech® smooth finish on both faces.  Suitable for acoustic applications to NZBC G6/AS1.  Available in rolls 90mm thick x 430mm and 580mm wide x 8.5m long with R-value of 2.6.  Refer to SELECTIONS.

Refer to 4161 UNDERLAYS, FOIL AND DPC for wire netting used to support the insulation.

Proprietary plastic strapping tape.

Refer to 1270 CONSTRUCTION for requirements relating to delivery, storage and handling of products.

Do not use damaged or wet insulation material.

Refer to 1250 TEMPORARY WORKS & SERVICES for protection requirements.

Refer to 1270 CONSTRUCTION for requirements relating to defective or damaged work, removal of protection and cleaning.

Check work previously carried out and confirm it is of the required standard for this part of the work

Refer to the general section 1270 CONSTRUCTION for general requirements.

Lay, install, fit and fix insulation without gaps, tucks, folds and over compaction to NZBC H1/AS1 or AS2 and Earthwool Installation Instructions.  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.  Allow insulation to re-loft/relax prior to installation.  Do not cover vents.  Lift up electrical wires, lighting transformers/controllers and lay the insulation underneath.

Non-residential recessed light fittings to AS/NZS 3000, 4.5.2.3.5;

• Existing fittings or retrofit situations, fittings maybe unmarked
• New fittings can only be labelled - CA 80, CA 90, CA 135, IC, IC-F, IC-4, NON-IC or Do-not Cover

Refer to clause INSULATION CLEARANCES GENERALLY for clearances.

Residential recessed light fittings to AS/NZS 3000, 4.5.2.3.5;

• Existing fittings or retrofit situations, fittings maybe unmarked
• New fittings can only be labelled - CA 80, CA 90, CA 135, IC, IC-F & IC-4

Refer to clause INSULATION CLEARANCES GENERALLY for clearances.

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

• The requirements of NZS 4246.
• The insulation is exposed to the source of heat or equipment etc.
• Insulation, has passed the needle flame test to AS/NZS 60695.11.5 and/or is non-combustible.
• Gaps to hot surfaces may have to be increased with non-compliant insulation and plastic/polymeric type insulation (EPS, XPS, PIR, etc), check with insulation manufacturer.
• Gaps to hot surfaces may be able to be reduced with non-combustible insulation, check with equipment manufacturer.
• "Secure insulation" if required means, glue, mechanical fix, or provide fixed barriers at gap edge of insulation to hold in place.  Rigid or semi rigid insulation may only need a firm friction fit (secure loose pieces).

INSULATION CLEARANCES FROM RECESSED LIGHT FITTINGS

FOR MINIMUM INSULATION CLEARANCES TO INBUILT RECESSED HOT APPLIANCES - REFER TO NZS 4246

INSULATION CLEARANCES FROM EXTRACTS, VENTS, PIPES & ROOF UNDERLAY

Lay at right angles across the rafters/roof joists (under purlins).  Pull tight and fix.

Lay at right angles across the framing at a minimum of 300mm centres, staple tape to each framing member with stainless steel staples.

Cut insulation using a sharp craft knife.

Measure distance between studs and cut Earthwool® glasswool insulation segments/rolls minimum 10mm wider and friction fit between framing members with front face of insulation flush with framing.  Leave no gaps and maintain full thickness of insulation over whole installation.  If cavity depth is greater than the insulation nominal thickness, fix or strap the insulation to secure.  Cut insulation pieces as required to fill small spaces, behind outlet boxes, gaps around penetrations and other obstructions.  Without compressing, tuck insulation behind wiring, plumbing or ductwork.

Measure distance between studs and cut Earthwool® glasswool insulation segments/rolls minimum 10mm wider and friction fit with one side of the segment in the metal C-channel and other edge butted against the next metal stud.  Leave no gaps and maintain full thickness of insulation over whole installation.  If cavity depth is greater than the insulation nominal thickness, fix or strap the insulation to secure.  Cut insulation pieces as required to fill small spaces, behind outlet boxes, gaps around penetrations and other obstructions.  Without compressing, tuck insulation behind wiring, plumbing or ductwork.

Friction fit Earthwool® glasswool insulation segments/rolls between floor joists, leaving no gaps and maintaining full thickness of insulation over whole installation.  Cut insulation pieces as required to fill small spaces, gaps around penetrations and other obstructions.  Without compressing, tuck insulation behind wiring, plumbing or ductwork where possible.

Friction fit Earthwool® glasswool insulation segments/rolls between ceiling framing members, leaving no gaps and maintaining full thickness of insulation over whole installation.  R7.0 & R8.0 Ceiling batts are designed to expand over truss chords / ceiling joists without the need for notching of batts.  Cut insulation pieces as required to fill small spaces, gaps around penetrations and other obstructions.  Without compressing, tuck insulation behind wiring, plumbing or ductwork.

Loose lay Earthwool® glasswool insulation rolls over the ceiling framing and between truss chords, leaving no gaps and maintaining full thickness of insulation over whole installation.  Cut insulation pieces as required to fill small spaces, gaps around penetrations and other obstructions.  Without compressing, tuck insulation behind wiring, plumbing or ductwork.

Friction fit Earthwool® glasswool insulation segments/rolls between ceiling framing members, level with the top of the framing.  Loose lay a layer of Earthwool® glasswool insulation rolls over the ceiling framing, laid at 90° to the framing direction.  Leave no gaps and maintain full thickness of insulation over whole installation.  Cut insulation pieces as required to fill small spaces, gaps around penetrations and other obstructions.  Without compressing, tuck insulation behind wiring, plumbing or ductwork.

Where perimeter of ceiling space is too low to allow full depth of insulation plus the 25mm air gap to the underlay, provide reduced perimeter insulation to NZS 4246. 6.2, and maintain the 25mm gap.

Install, to manufacturer requirements, in ceiling voids with sufficient compression to maintain stability above the wall below.  Cut and trim to seal round ducts, piping and other services to ensure that there are no gaps or openings allowing sound to travel.  Adequate ventilation is required around electrical fittings due to heat given off.

Refer to 1270 CONSTRUCTION for completion requirements and if required commissioning requirements.

Earthwool® glasswool insulation packaging is recyclable.