Spray foam underfloor insulation is a high-performance insulation solution applied directly to the underside of timber floors or elevated concrete floors. Once applied, the foam expands and cures within seconds, creating a continuous insulation and air-seal that helps eliminate draughts and cold floors.

Spray foam insulation is made up of millions of microscopic cells that provide both thermal insulation and air sealing in a single application. The result is a warmer, more comfortable home with improved energy efficiency year-round.

Our underfloor spray foam insulation is water-based and manufactured without CFCs.

How Underfloor Spray Foam Insulation Works.

Spray foam is applied as a liquid to the underside of the floor, where it expands to form an insulation barrier of approximately 100mm or more, depending on the application.

Unlike traditional insulation batts, spray foam:

• Requires no fixings or supports
• Bonds directly to timber or concrete surfaces
• Does not move, sag or leave gaps
• Seals cracks and cavities that allow draughts

This creates a long-lasting insulation system that remains effective for the life of the building.

Benefits of Spray Foam Underfloor Insulation

• Eliminates draughts and cold floors
• Improves indoor comfort in winter and summer
• Achieves high thermal performance (R-values of 2.4 per inch or more)
• Reduces air leakage through floors
• Helps prevent pest and rodent nesting
• Lowers heating and cooling energy costs
• Long-lasting insulation that does not shrink or deteriorate
• Environmentally responsible insulation solution

Homes with timber floors benefit significantly from underfloor spray foam insulation, as it seals gaps that commonly allow cold air infiltration and heat loss. By reducing air leakage and floor surface exposure, energy efficiency can improve by 30% or more.

A Healthier, More Comfortable Home

Spray foam underfloor insulation helps maintain more consistent indoor temperatures, making homes warmer in winter and cooler in summer. It also reduces moisture movement and draughts, contributing to a more comfortable and healthier living environment.

Once cured, spray foam insulation is completely safe for occupants.

Professional Installation

Spray foam underfloor insulation must be installed by fully trained and licensed professionals. Most residential installations can be completed in approximately one day, with minimal disruption.

All work is completed to Australian Standards, and a Certificate of Compliance is provided on completion.

Service Areas

We provide underfloor spray foam insulation services across:

• Victoria
• South Australia
• Southern NSW
• The ACT

We also quote for commercial and industrial insulation projects Australia-wide.

Ready to Improve Your Home’s Comfort?

Underfloor insulation can make a noticeable difference to comfort and energy efficiency.