Soundproofing is essential for comfort and privacy - whether you're building new or upgrading an existing space. Flexible natural fibre insulation offers a safe, breathable and highly effective way to reduce airborne sound transmission through walls, floors, and ceilings.
Products such as Thermafleece Cosywool, Gutex Thermoflex, and IndiBreathe Flex combine excellent acoustic absorption with thermal insulation, delivering dual benefits in one installation. Made from natural fibres like sheep’s wool, hemp, woodfibre and jute, these materials reduce reverberation and absorb sound across a broad frequency range - without introducing harmful chemicals into the environment.
Unlike rigid or synthetic alternatives, flexible fibre insulation is simple to fit snugly between timber studs or joists, even in irregular voids. Their density and softness help dampen airborne sound such as speech, music, and background noise - making them ideal for bedrooms, offices, media rooms, or in ceilings and walls between flats.
These materials also regulate moisture and contribute to a healthier indoor climate. They’re safe to handle, easy to cut, and made with sustainability in mind - so they’re as good for your building as they are for the planet.
Whether you're insulating timber-framed internal partitions, suspended floors or ceilings, flexible natural fibre insulation is a dependable, eco-friendly solution for acoustic performance and comfort.
About Natural Fibre Acoustic Insulation
Flexible acoustic insulation made from natural fibres offers a high-performance, breathable solution for reducing sound transmission. Materials like Thermafleece Cosywool, Gutex Thermoflex, and IndiBreathe Flex combine density with resilience to absorb airborne noise effectively across a broad frequency range. These products are ideal for timber-framed walls, floors, and ceilings - fitting snugly between joists or studs without gaps. This tight fit prevents sound leaks and maintains consistent performance. Natural fibre insulation also delivers thermal benefits, helping to regulate temperature and reduce energy use. Their hygroscopic properties mean they can buffer moisture, supporting a healthy indoor climate. Free from harmful chemicals, they’re safe to install in occupied buildings and require no special handling. Use flexible natural insulation to create quieter, more comfortable spaces while supporting sustainability and wellbeing.
Flexible fibre insulation offers high-performance acoustic control in walls, floors, and ceilings. Natural materials such as wool, hemp, and woodfibre absorb airborne sound while regulating temperature and moisture. Their flexibility allows for tight, gap-free installation—reducing sound leaks and improving overall performance. Ideal for retrofits or new builds, these safe, sustainable materials contribute to better indoor comfort, air quality and energy efficiency. Whether you're creating quiet bedrooms, separating office spaces or improving inter-floor sound insulation, natural acoustic insulation provides an effective and eco-conscious solution.
Key Benefits
Excellent Sound Absorption
Airborne sound is absorbed through walls, floors and ceilings.
Flexible fit
Ensures gap-free installation and consistent performance.
Dual purpose insulation
Thermal insulation and acoustic insulation.
Natural
Breathable and free from harmful VOCs
Hygroscopic properties
Helps manage moisture. Ideal for retrofits, new builds, and sensitive environments
IndiBreathe Flex
Gramitherm Sustainable Grass Insulation
