Underfloor Insulation
Why Insulate Underfloor?
Many homes with suspended timber floors have an empty, ventilated space beneath the floorboards. While this airflow is important for keeping the structure dry, it can also allow heat to escape and sound to travel more easily through the floor.
Without insulation between the floor joists, warm air from your home can be lost into the void below while cold air rises through gaps in the floorboards. This can make rooms feel colder and less comfortable, particularly during the winter months.
At the same time, the open structure of timber floors can allow sound to travel between rooms and levels of the home. Footsteps, movement, and general household noise can pass through the floor structure more easily when no insulation is present.
Installing insulation beneath a suspended floor can help address both of these issues by improving thermal performance and reducing sound transmission within the home.
Signs your floor may benefit from underfloor insulation include:
• Floors that feel cold underfoot
• Rooms that struggle to retain heat
• Draughts coming through floorboards
• Noticeable sound travelling between floors or rooms
Depending on the needs of the property, underfloor insulation can be installed to improve thermal efficiency, reduce noise transmission, or provide a combination of both.
Thermal Underfloor Insulation
Thermal vs Acoustic
Acoustic Underfloor Insualtion
Thermal underfloor insulation helps reduce heat loss through suspended timber floors by installing insulation between the floor joists. This creates a thermal barrier that keeps warmth inside the home while preventing cold air from rising from the ventilated space beneath the floor.
By insulating the floor structure, rooms feel warmer underfoot and heating systems can operate more efficiently, helping to improve overall comfort and reduce energy usage.
Modern insulation materials used for thermal underfloor insulation are lightweight, flexible and designed to fit securely between joists without blocking the airflow needed to keep the floor structure healthy and dry.
Acoustic underfloor insulation is designed to reduce the transfer of sound through suspended floors. By installing sound-absorbing insulation between the floor joists, it helps minimise impact noise such as footsteps as well as airborne noise travelling between rooms.
This can make a noticeable difference in homes where noise travels easily between levels or between adjoining rooms.
Acoustic floor insulation works by absorbing sound vibrations within the floor structure, helping to create a quieter and more comfortable living environment while maintaining proper ventilation beneath the floor.
The Underfloor Insulation Installation Process
Book Your Survey
During The Survey
The Installation
Aftercare
You’re Covered with an Insurance Backed Guarantee.
We include Insurance Backed Guarantees through HomePro on eligible installation services. That means your investment is protected — even if the unexpected happens.
Request an Installation Survey
Get a Free, No Obligation Loft Insulation Quote
Call us on 0800 002 9558
Email us at info@carbonzerosolutions.co.uk
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Where We Work
We carry out projects across key counties in the South and beyond. Click any county below to see full details on our Areas We Cover page.
* London projects are taken on a case-by-case basis depending on size and cost-effectiveness.
*Carbon Zero Solutions Ltd is an Introducer Appointed Representative (Financial Services Register No. 1032760) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.