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INSTALLING EXPOL TIMBER UNDERFLOOR INSULATION

Looks like you are about to take the next step to creating a healthier home environment. That’s great news for you and your family.

Whether you are choosing to have EXPOL professionally installed or going it alone, you will not go past EXPOL UnderFloor Insulation.

To assist you, we’ve developed an easy step guide – follow it and you can’t go wrong.

Don’t forget to pick up your EXPOL UnderFloor Insulation DIY Ruler, which is also available online at www.expol.co.nz. Use it to measure the underfloor joist sizes, so you can purchase the correct panels for your DIY Insulation project.

Step 1

Measure

Place your EXPOL DIY Ruler against one side of the joist. The opposite joist will fall within one of our 4 panel sizes.

Joist sizes can vary, so be sure to measure more than one. You may need a few different panel sizes to complete the job.

Step 2

Trim the edge

If the panel is too wide, simply slice down the appropriate concertina edge, leaving the panel approximately 5mm over sized to ensure a firm fit.

Step 3

Existing Floor

Slide the panel between the joists. The concertina designed cuts will ensure a tight fit.

The panel should be pushed up hard against the bottom of your floor leaving no air gap.

A minimum gap of 200mm must be left around metal heating flues, OA rated recessed down lights and ceiling exhaust fans, and a 50mm gap is required around brick/concrete chimneys.

Step 3a

Existing Floor Fixings

Two EXPOL L Brackets are required to be fixed in opposite corners under the panel.

Use the stainless steel nails supplied. This will ensure the EXPOL panel will stay in place.

Step 3b

New Floors

Before floorboards or flooring sheets are installed. The concertina designed cuts will ensure a tight fit.

Simply place the panel on top of the EXPOL Joist Saddles. The panel should sit flush with the top of the joist to ensure there is no air gap.

A minimum gap of 200mm must be left around metal heating flues, OA rated recessed down lights and ceiling exhaust fans, and a 50mm gap is required around brick/concrete chimneys.

Step 3c

New Floor Fixings

Two EXPOL Joist Saddles are required to be fixed in opposite corners.

Simply slide the saddles over the joist, nail the saddle into the top of joist if required and place the panel in before the floor is put down. This will ensure the EXPOL panel will stay in place.

Step 4

Electrical

For cables that come into DIRECT contact with EXPOL UnderFloor, place EXPOL Wireguard around the wires before installation.

Do not use a staple gun to fix the Wireguard.

Take extra care when working around electrical wiring.

Step 5

Pipes & Plumbing

For obstacles such as pipes and plumbing, use your sharp knife to cut the panel and notch around the difficult areas.

For future maintenance, leave 100mm clearance around pipes and plumbing.

The Products

EXPOL R1.4 White UnderFloor Insulation is a rigid white panel manufactured from Expanded Polystyrene material, 1200mm in length manufactured in four standard widths. This proven solution for timber floor insulation has been on the market for over 25 years and contains recycled content.
Visit EXPOL R1.4 White UnderFloor Insulation     

 

Underfloor Insulation

EXPOL R1.8 Black UnderFloor Insulation is graphite infused Expanded Polystyrene supplied in the same sizes as the standard white Underfloor insulation. EXPOL BLACK is a premium product which achieves superior R values.
Visit EXPOL R1.8 Black UnderFloor Insulation     

 

EXPOL UNDERFLOOR INSULATION VIDEOS

DO IT ONCE – DO IT RIGHT

SIZES & R1.8 VERSES R1.4

MEASURING JOIST WIDTH

SECURING PANELS

WIREGUARD – HOW AND WHY

TESTING FLAMABILITY

For further installation guidelines: Refer to NZS 4246:2016 Energy efficiency – Installing insulation in residential buildings www.standards.govt.nz

EXPOL R1.4 White UnderFloor Insulation is BRANZ Appraised.

FURTHER INFORMATION

SPECIFIERS, ARCHITECTS AND PLANNERS

For all specifying information, relevant product testing and other detailed information please refer to MasterSpec documents on www.masterspec.co.nz or contact EXPOL for an electronic copy.

BRANZ APPRAISAL

EXPOL R1.4 UnderFloor has a BRANZ appraisal.
See BRANZ certificate number 256.

INSULATION STANDARD

All EXPOL timber floor insulation solutions comply with the Australian and New Zealand Standard AS/NZS 4859.1:2002.

MANUFACTURING STANDARD

All panels have a yellow stripe down one edge to confirm compliance with manufacturing standard AS 1366 Part 3 1992 for SL grade.

For further, detailed information on all products contact EXPOL 0800 86 33 73

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