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EXPOL underfloor r1.4 white for Timber Floor insulation

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EXPOL UnderFloor R1.4 White is available in 4 convenient joist widths 560, 470, 410, 360 (mm). Quick and easy to install it is long-lasting insulation that creates a warm, dry home which is healthier to live in and costs less to heat. 

It can be used on new and existing timber floors and fits snugly between timber floor joists to stop drafts and damp from entering.  

EXPOL UnderFloor R1.4 White is made of rigid polystyrene, so it won’t sag over time. It is also flame retardant, vermin resistant and helps reduce noise from timber floors.

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IDEAL USES

Existing Timber Floors

EXPOL UnderFloor R1.4 White is the easy insulation solution for original polished timber floors in bungalows, villas and pole houses. It fits snugly between floor joists, eliminating draughty gaps and creating a barrier against moisture

New Timber Floors

EXPOL UnderFloor R1.4 White is a highly effective, environmentally-responsible solution for insulating timber floors in new homes. Its R Value of 1.4 exceeds the minimum requirement for underfloor insulation and improves the overall insulation rating of the home. Flame retardant and water resistant, it is also immune to sagging, making it a safe, long-term solution

MORE ABOUT EXPOL UNDERFLOOR R1.4 WHITE

EXPOL UnderFloor is BRANZ Appraised and comes with a 50 year product warranty.

It is made using expanded polystyrene (EPS), a recyclable product that is 98% trapped air, which makes it an excellent insulator. Unlike other insulation materials, EPS is a rigid product – that means it won’t sag or be prone to creating gaps over time.

As well as keeping heat in, EPS is great at keeping moisture and wind out. It is also flame retardant and has no nutritional value for rats, mice, birds or animals. These properties make it the perfect insulation material for your home.

Whether you’re a professional or a DIYer, installing EXPOL UnderFloor R.14 White is quick and easy. The product is lightweight, anti-allergenic and available in four widths that fit a range of standard joist spacings.

EXPOL UnderFloor R1.4 White comes in convenient 1.2 metre lengths. Each panel is 60mm thick and can be compressed by up to 20mm, making installation even easier. Panels can also be quickly trimmed to size if need be.

SYSTEM COMPONENTS

WIRE GUARD

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EXPOL Wireguard is a waxed paper strip that separates exposed electrical cables from EXPOL UnderFloor insulation. It is important to use EXPOL Wireguard because, in some cases, EPS can degrade the elastic properties of some electrical cables over a prolonged period.

FIXINGS

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Non-corrosive nylon fixings, with a stainless steel nail, are used to fix EXPOL UnderFloor panels in place. These fixings are suitable for use in both new and existing floor installations.

CONSTRUCTION ADHESHIVE

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Our water-based glue adheres polystyrene to most surfaces. EXPOL UnderFloor panels can be glued in place using this adhesive as an alternative, or in combination with nylon fixings.

HOW MUCH DO I NEED?

CHOOSING THE RIGHT PRODUCT

EXPOL UnderFloor R1.4 White comes in four widths, designed to suit most standard floor joist spacings. To find out which width is right for your floors, you can use our handy ruler.

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Download our handy panel size ruler here

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

CALCULATING HOW MUCH PRODUCT YOU NEED

Use the table below or the Pack Calculator to the right to determine how many EXPOL packs you require. You will need to measure the total floor area you wish to insulate.

RIGID POLYSTYRENE SIZES:

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EXPOL PACK CALCULATOR

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TIP: If you’re working to a budget, you can insulate one room at a time.

INSTALLATION INSTRUCTIONS

EXPOL makes insulating your floors easy.

To ensure you get the best result, follow these simple steps or watch our 'How to Install EXPOL UnderFloor R1.4' video.

Step 1

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Place your Easy Measure Ruler or a tape measure against one side of the joist. The opposite joist will fall within one of our four 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

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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

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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.

Step 4

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Fixings: Once panel is installed tack two Expol Fixings in opposite corners to ensure Expol Underfloor will stay in place for the lifetime of your home.

 

Step 5

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Electrical: For cables that come into DIRECT contact with Expol Underfloor, place Expol Wireguard around the wires before installation.

Step 6

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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.

 

RATHER LEAVE IT TO THE PROFESSIONALS?

If you'd prefer EXPOL UnderFloor to be fitted by one of our registered installers, call us on 0800 UNDERFLOOR (86 33 73).

Technical information

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FREQUENTLY ASKED QUESTIONS

What happens to Expol UnderFloor insulation in a fire?

Expol UnderFloor insulation is flame retardant and will not support a fire.

Does Expol UnderFloor insulation give off any toxic fumes?

The level of toxicity of Expol UnderFloor insulation in a fire is no greater than that of burning timber.

What if my sizes differ from Expol UnderFloor insulation standard sizes? 

The flexi-cut edges of Expol UnderFloor insulation panels allow the panels to be adjusted to varying floor joist spacings.

Do I need to use fixings for a new floor?

Yes. When fixing from the top of the joist the nylon fixing is placed flush with the top of the joist, this ensures the panel sits flush with the underside of the floor. Usually a maximum of two fixings are used per panel.

How does Expol UnderFloor insulation come?

Expol UnderFloor insulation is plastic wrapped and delivered to your merchant in bundles of approximately 6 square metres.

WHERE TO BUY

EXPOL UnderFloor is available at a number of leading building products stores. Find your nearest stockist here.

View EXPOL distributors in a larger map

Other Expol underfloor insulation products which may be of interest

EXPOL Black Underfloor R1.8

Fast Facts
  • Insulation makes your home warmer and dryer. It also reduces the need for heating. 
  • By using less energy to heat your home, you are not only helping yourself, you are also helping the planet.
  • The money you spend now on insulation will soon pay for itself in reduced energy bills and additional comfort in the future.
  • Insulation performance is measured by R-value, the higher the R-value the more effective it is.
  • If a house already has thin and ineffective insulation, it is worthwhile adding an extra layer on top.
  • Even if the air temperature is cold, a person standing on a warm floor will feel more comfortable.

Underfloor Pack Calculator

Area to be insulated

Number of Packs Required - choose width

R-Value Calculator

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General
Enquiry Form

General Enquiry

Tel: +64 (9) 634 3449

Free Phone: 0800 86 33 73

sales@expol.co.nz

105 Captain Springs Rd., Onehunga, Auckland

Tel: +64 (9) 634 3449

Free Phone: 0800 86 33 73

sales@expol.co.nz

105 Captain Springs Rd., Onehunga, Auckland

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