• Project Proofs
Business Groups in Australia
Kingspan Insulation
Kingspan Insulated Panels
Kingspan Water & Energy
Products
Kooltherm Phenolic Insulation Boards
Therma PIR Insulation Boards
AIR-CELL Flexible Insulation Rolls
Contact Us
About Us
Get in Touch
LinkedIn
Instagram
Facebook
Legal Information
Cookies Policy & Control
Terms & Conditions of Website Use
Website Privacy Policy
Customer Privacy Policy

© 2026 Kingspan Holdings (IRL) Limited, All Rights Reserved

BACK TO TOP

Similar Products

Benefits of Kooltherm

Discover More about Kooltherm

Kooltherm lightweight

Construction Efficiency

Kooltherm insulation boards are lightweight, making them easy to transport, handle and fast install.

Kooltherm value of space

Increasing Property Value

Kooltherm's thin profile allows you to maximise lettable space and lifetime property value.

Kooltherm fibre-free core

Occupancy Wellbeing

Products with a fibre-free core.

Planet Passionate

Sustainability

Kooltherm is part of our Planet Passionate sustainability initiative.

Frequently Asked Questions

  1. Home
  2. Floor Insulation
  3. Kooltherm K3 Floorboard

For More Information on our Products

Call us on 1300 247 235. For samples, pricing, where to buy, technical & application advice, thermal calculations & CPDs, click below.
General Enquiry
Technical Enquiry
Book a CPD Session
Buy Online
Request a Sample
Kingspan Portsea Surf Life Saving Club Case Study Hero

Portsea Surf Lifesaving Club in Victoria

Portsea Surf Lifesaving Club in Victoria

Case Study4 min read
Kingspan 7 star solution comparison

What is 7 Star?

7 Star rating ensures energy-efficient homes, lowering costs and environmental impact.

Knowledge Article5 min read
Kingspan Geelong Library & Heritage Case Study Centre Hero

Geelong Library & Heritage Centre

Geelong Library & Heritage Centre

Case Study3 min read
Home

What is an R-value?

Learn about the part the R-value plays in working out the energy efficiency of buildings.

Knowledge Article11 min read
8.2 Star-rated Home Case Study in SA

8.2 Star-rated Home, South Australia

Kingspan Kooltherm helps deliver a 8.2 Star-rated home in South Australia.

Case Study5 min read
Kingspan Continuous Insulation Knowledge Base Article 1

Spotted: Continuous Insulation

It is important to understand how continuous insulation can help

Knowledge Article4 min read
Framing board insulation suitable for internal walls

Kooltherm K12 Framing Board

Framing board insulation suitable for internal walls
Soffit board with a silver finish, suitable for ceiling insulation
White-faced soffit board suitable for ceiling insulation
Insulated fibre cement board for concrete soffits with Group 1 fire rating
Closed-cell cavity wall insulation
Insulated plasterboard with a thin profile

Kooltherm K10 G2 Soffit Board

Soffit board with a silver finish, suitable for ceiling insulation

Kooltherm K10 G2W White Soffit Board

White-faced soffit board suitable for ceiling insulation

Kooltherm K10 Plus Soffit Board

Insulated fibre cement board for concrete soffits with Group 1 fire rating

Kooltherm K8 Cavity Board

Closed-cell cavity wall insulation

Kooltherm K17 Insulated Plasterboard

Insulated plasterboard with a thin profile
Kooltherm K3 Underfloor Board
Kooltherm K3 Underfloor Board render
Kooltherm K3 Underfloor Board application under slab
Kooltherm K3 Underfloor Board application under slab

Kooltherm K3 Floorboard

Kooltherm K3 Floorboard is a thin underfloor insulation board. It can be used under concrete slabs and is ideal for both new build and refurbishment projects.

Product Highlights

  • Australian made

  • Used as underfloor insulation for 7-Star houses

  • NCC and AS/NZS 4859.1:2018 compliant

  • Fibre-free core

  • Resistant to the passage of water vapour

  • Easy to handle and install

  • Ideal for new build and refurbishment

Buy now