Underfloor Insulation

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The ultimate underfloor insulation for all seasons

EXPOL underfloor insulation acts as a barrier to the flow of heat, working to keep your home warm in winter and cool in summer. A well-insulated home can reduce your need for heating & cooling. And as a result, reduces greenhouse gas emissions.

Do it yourself installation, step by step guide.

Expol Underfloor Insulation is ideal for both retro-fitting under existing floors and new floor installations. Installation is easy and each pack comes with a complete set of instructions, or you can follow our easy installation video.

Rigid polystyrene panels are 1.2 metres long and 60mm in thickness, produced in four standard widths to fit between most standard joists. All Expol panels are concertina cut on both sides to allow for a compression of up to 20mm for ease of installation, and to ensure a snug fit between the joists.

Premium Underfloor Insulation

Trusted for more than 20 years, EXPOL Underfloor Insulation is easy-to-install and is available in 4 convenient joist widths 560, 470, 410, 360 (mm). It is the DIY solution that will keep your home warm, dry and healthy.

Find out how much EXPOL you will need for your home


Easy to install

Available nationwide

Fire Retardant

Moisture Resistant



50 Year Warranty

Branz Appraised

High Strength

Light weight & easy to install

Manufactured in Australia

Support local

Customer Reviews

I'm very happy with the end result, we didn't use our heater half as much after the Expol insulation was installed and our baby boy crawling around the floor probably noticed the most difference, without getting such cold hands and knees. We are very happy with the product and service provided.


We are very happy with the installation of Expol, even though it's only been a bit over a week since it was installed we have noticed a big difference & find we are turning the air conditioner off about 1 hour before going to bed because the lounge room is so warm, which we have never done before. I would have no hesitation in recommending your product & your service, which was excellent.


Time to enjoy warmer feet and
save up to 12% on your heating bill.