The OmniFit® Range: For Roofs
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The Knauf Insulation OmniFit® range is a multi-use insulation designed to simplify specification and installation across multiple roof types.
Engineered for thermal, acoustic, and fire performance, OmniFit® products work seamlessly in Warm Roofs (Pitched roof between rafters), Cold Roofs (Pitched roof ceiling level) and Loft Conversions.
Its flexible, friction‑fit design ensures a snug, reliable installation, while its ECOSE® binder enhances on‑site handling.
The OmniFit® range: The Alternative To Typical Mineral Wool Insulation For Roofs
Instead of switching between FrameTherm®, Loft Roll & Rafter Roll. The OmniFit® range is a multi-application solution, that works seamlessly across all these common roof types.
With slabs and rolls in core densities and the friction fit design of glass mineral wool, it can slot into different roof systems with ease, providing thermal and acoustic performance without needing a different SKU for every application.
For installers and specifiers, that means simpler ordering, fewer product changes on site, and the confidence that one reliable solution can meet the demands of multiple build types.
The OmniFit® range doesn’t just replace traditional roof insulation products, it streamlines the whole process.
The OmniFit® Range In Action: View Our Case Studies
The OmniFit® Range Frequently Asked Questions
OmniFit® Thermal and Sound Slab has been tested for acoustic performance and has been awarded with the Quiet Mark.
OmniFit® Thermal and Sound Slab 100mm meets the requirements for Approved Document E and relevant robust details – it is greater than 10kg/m3. The range has been issued the Quiet Mark as a recognised accreditation of acoustic performance and has a Sound Absorption Coefficient of 1 (for 100mm) – the maximum possible rating.
Sound absorption coefficients are measurements used to determine the ability of a material or surface to absorb sound waves. These coefficients are expressed as a number between 0 and 1, with 0 indicating that the material does not absorb any sound and 1 indicating that it absorbs all sound. The higher the absorption coefficient, the better the material's ability to absorb sound.
- OmniFit® Thermal and Sound Slab 50mm – 0.9
- OmniFit® Thermal and Sound Slab 100mm – 1 (maximum)
Yes.
OmniFit® Thermal and Sound Slab has the best possible Euroclass A1 non-combustible reaction to fire rating – meaning it will not contribute to the spread of flame should a fire occur. Glass mineral wool has a lower melting temperature than rock mineral wool – however it is still in excess of 800ºC. A product in isolation can not be deemed fire safe as it depends on other elements in the system.
For construction applications that require it, Knauf Insulation’s glass mineral wool and rock mineral wool products are produced in line with maximum water absorption threshold limits:
Short-term water absorbance (WS) method < 1 kg/m2 [EN ISO 29767]
Long-term water absorbance (WLP) method < 3 kg/m2 [EN ISO 16535]
The same is true for glass mineral wool and rock mineral wool products from other manufacturers.
Yes, depending on the application you are putting the product into. Glass mineral wool can be used as an alternative to low-density rock mineral wool, it offers an enhanced thermal performance, identical reaction to fire rating and equivalent sound insulation performance.
It has 4 – therefore can be installed any way around.
OmniFit® Thermal and Sound Slab can be used in multiple applications:
- Internal partition walls
- Pitched roof – rafter level
- Suspended timber ground floors
- Separating timber floors
- Internal floors
- Timber frame walls between studs
This list is not exhaustive, however for anything outside of this, please confirm with Technical Services and provide a build up.
Other Suitable Applications For The OmniFit® Range
OmniFit® is suitable for multiple applications—walls, roofs, floors, and façades — allowing installers to work with a single, reliable solution that adapts to different areas of a project, whilst maintaining consistent performance and ease of handling.
Ready to streamline your OmniFit® product specification?
From project design and specification to installation and completion, our product and technical teams are perfectly positioned to support your construction.