I NSTALLATION I NSTRUCTIONS
E ARTHWOOL ® G LASSWOOL I NSULATION U NDERFLOOR B ATTS
For guidance on installations in Australia use AS 3999:1992
and for New Zealand use NZS 4246:2006 including amendments
Refer to our safety precautions at the end of this document before commencing work.
Do not start work until the site is safe!
Assess the underfloor condition and structure together with the method of installation you are to use based on the
appropriate requirements established in the building code, site assessment and or plans provided. Installation
must be completed to the requirements of relevant standard: AS 3999:1992 or NZS 4246:2006.
Tools required:
Tools required to install Earthwool Glasswool Insulation Underfloor Batts:
• tape measure
• lightweight overalls
• electrical hazard labels
• headlamp/general lighting
• protective clothing
• safety glasses
• polythene banding, minimum 12mm wide and 50kg breaking strain
• Staple Gun/tacker to fix minimum 8mm staples
• Galvanised/Stainless staples (minimum 8mm)
STEP 1
• Ensure you have the right product for the application. Check the thermal resistance rating (R-Value) required on
drawings/plans and that this matches the product selected.
• Check the joist width to determine the correct insulation batt width (e.g. 480mm or 610mm). It is designed to fit
full width between the joist, or to have a fold down on one side,
• Product shall ALWAYS BE FITTED WITH STRAPPING – see diagrams, strapping must always be taut.
• If fitted with fold down, the fold should be no more than 75mm below bottom of product.
• If over-width, Earthwool Glasswool Insulation Underfloor Batts are easily cut with a sharp knife.
• Start from the furthest point ensuring the bottom plate is covered and work back towards the access entrance of
the underfloor.
• When installing, energise each batt by giving it a light shake and gently bouncing it on its side, ensuring the
product expands to the thickness specified on the label.
STEP 2
• Split the plastic wrapping lengthwise – Earthwool glasswool insulation is compressed during packing and will
expand on being released.
• Earthwool glasswool insulation may be trimmed to appropriate sizes if required.
• Place insulation in accordance with AS 3999:1992 / NZS 4246:2006, ensuring appropriate clearances from
recessed lights, plumbing, extractor fans, chimney elements and piping as appropriate.
• Refer to relevant standard for guidance regarding placement of insulation and stapling around electrical wiring.
EXTREME CAUTION REQUIRED
• If insulation is covering any wires, apply the Electrical Hazard labels at that point
STEP 3
• Place long edge side of batt first neatly into the joist/underside of floor intersection.