HomeNewsWhy Your Floors Feel Cold
    April 2025

    Why Your Floors Feel Cold (And How to Fix it in NZ Homes)

    Cold floors in a New Zealand home — underfloor insulation solution

    Why Your Floors Feel Cold

    If your home feels cold — even when the heating is on — the problem may not be the air temperature, but what's happening beneath your feet.

    Cold floors are one of the most common comfort issues in New Zealand homes, particularly in older properties. In many cases, it comes down to how heat is lost through the floor.

    Why Floors Feel Cold in New Zealand Homes

    Many NZ homes, especially those built before modern insulation standards, have little or no insulation under the floor.

    Timber floors are particularly vulnerable. Without insulation, heat naturally moves downward and escapes through the floor structure.

    This means:

    • Warm air generated inside your home is lost
    • Floors remain cold to the touch
    • Heating systems need to work harder to maintain comfort

    Even well-heated homes can feel uncomfortable if this heat loss isn't addressed.

    How Underfloor Insulation Helps

    Underfloor insulation works by creating a thermal barrier between the living space and the colder area beneath the home.

    Installed between floor joists, it helps:

    • Reduce heat loss through the floor
    • Maintain a more stable indoor temperature
    • Improve overall comfort in living areas

    Suitable for Both New and Existing Homes

    One of the key advantages of Expol underfloor insulation is that it can be installed in both new builds and existing homes.

    For many properties, particularly those with accessible subfloor space, it can be added without major renovation work.

    This makes it a practical upgrade for improving thermal performance in older homes.

    Choosing the Right Insulation for Your Home

    Expol offers a range of underfloor insulation products designed to suit both retrofit applications and new builds. Selecting the right option depends on your home, location, and performance expectations.

    For Existing Homes (Retrofit)

    R1.4 Timber Underfloor Insulation
    A cost-effective option suitable for improving comfort in existing homes where no insulation is currently installed.

    R1.8 Timber Underfloor Insulation
    Designed for homeowners wanting greater thermal performance in retrofit applications.

    For New Builds or Higher Performance

    R2.5 Timber Underfloor Insulation
    Engineered to meet current Building Code requirements for new homes, providing reliable thermal performance.

    R3.1 Timber Underfloor Insulation
    A higher-performance option for improved comfort and efficiency, particularly in colder regions.

    Understanding R-Values

    R-values measure how well insulation resists heat flow.

    • Lower R-values → basic thermal improvement
    • Higher R-values → better heat retention and comfort

    Choosing the right level depends on your climate, home type, and desired performance.

    How Much Insulation Do You Need?

    The amount of insulation required will depend on:

    • Floor area
    • Joist spacing
    • Product selection

    To help with planning, Expol provides an online calculator that estimates the quantity of insulation needed for your project.

    Explore our full range of underfloor insulation solutions: Underfloor Insulation Solutions