Technical Guidance
Thermal and acoustic insulation are essential components of modern building design. Used across walls, floors, roofs and façades, insulation helps improve energy efficiency, control sound transmission and enhance overall building performance.
Correct specification of insulation materials supports occupant comfort, regulatory compliance and long-term durability.
Thermal insulation is used to reduce the transfer of heat through building elements such as walls, roofs and floors.
By limiting heat loss in winter and heat gain in summer, thermal insulation helps maintain stable internal temperatures and improve energy efficiency. This contributes to reduced energy consumption and improved building performance.
Acoustic insulation is used to control the transmission of sound between spaces.
It helps reduce airborne noise (such as voices or music) and can also contribute to reducing impact sound, depending on system design. Acoustic insulation is commonly used within partitions, floors and ceilings to improve comfort within occupied buildings.
Thermal insulation works by slowing the movement of heat through materials, typically using low thermal conductivity products such as mineral wool or rigid insulation boards.
Acoustic insulation works by absorbing and reducing sound waves, limiting their ability to pass through building elements.
Many insulation materials are designed to provide both thermal and acoustic performance, depending on their composition and application.
Thermal and acoustic insulation is used across a wide range of building elements, including:
Correct selection depends on the required performance, system design and building use.
Common insulation materials include:
Widely used for both thermal and acoustic performance, particularly within walls, partitions and façades.
Used to achieve high thermal performance within building envelope systems.
Designed specifically to reduce sound transmission within partitions and floor systems.
Each material type is selected based on performance requirements and system compatibility.
Measured by thermal conductivity (lambda value), which indicates how effectively a material reduces heat transfer.
Measured by how well a system reduces sound transmission, often depending on the full build-up rather than a single material.
Insulation materials are tested to fire classification standards. Selection should align with overall system requirements.
Insulation must work alongside membranes, sub-frame systems and fire protection components.
Insulation plays a key role in meeting UK building regulations relating to energy efficiency, fire safety and acoustic performance.
Compliance should always be confirmed using:
Early coordination during design and specification is essential.
Thermal and acoustic insulation are fundamental to building performance, helping improve energy efficiency, control sound and support compliance with modern construction standards.
Correct material selection and integration within the overall system are key to achieving the required performance.
FGF supplies thermal and acoustic insulation materials alongside façade systems, membranes and fire protection components.
Talk to our team for guidance on product selection, system compatibility and project requirements.