Enquire Now
Robust Detail FFT-4

JCW Stonefloor

JCW Stonefloor is designed for use on concrete subfloors. It can be used within new build and refurbishment projects. Whether working to Robust Details or Pre Completion Testing, JCW can offer the ideal solution.

JCW Stonefloor is made from dense mineral wool slab and is available in various thicknesses. To suit a wide variety of floor heights.

JCW Stonefloor can be overlaid with an 18mm (min) tongued and grooved board. This is usually chipboard but can be plywood or engineered hardwood flooring.

A 5mm (min) resilient flanking strips is required around the perimeter of the flooring board. This is to isolate the floating floor from walls and skirting.

When installed correctly the JCW Stonefloor System will exceed the requirements set out in Part E of the Building Regulations.

With over 10 years of experience in installing all types of acoustic flooring systems, JCW Acoustic Flooring have the knowledge and expertise to ensure that floating floors are installed correctly giving complete peace of mind.

Frequently Asked Questions

Can JCW Stonefloor only be used on concrete?

Absolutely not!

JCW Stonefloor thermal and acoustic underfloor insulation can be used on a large variety of floor constructions, including:

  • Concrete subfloors
  • Flooring grade T&G chipboard, OSB, and plywood supported by concrete slabs or on fully boarded timber joist floors
  • Screeds laid in accordance with BS 8204: Part 1 and supported on levelled concrete slabs, plan, beam and block floors.
  • Concrete ground-bearing slabs over DPM, sand, and hardcore

Similarly, Stonefloor underfloor insulation can also be laid on slightly uneven flooring, thanks to its dual-density structure, the lower density can absorb imperfections in the flooring while the high-density surface provides point load resistance.

This means that JCW Stonefloor underfloor insulation is extremely versatile and can also be used in retrofit projects that may not be completely level due to age.

It should be noted that depending on the materials used alongside JCW Stonefloor underfloor insulation, installation guidance will differ. Be sure to check the manufacturer’s advice before you lay the flooring as incorrect installation can reduce thermal and acoustic performance.

For more information, you can email the team or fill in our short enquiry form.

Can I use JCW Stonefloor underfloor insulation in sustainable projects?

Mineral wool fibre insulation is notorious for being damaging to health and the environment. As such, you may be wondering if you can use JCW Stonefloor underfloor insulation in sustainably- conscious construction projects.

You will be glad to hear that JCW Stonefloor underfloor insulation is a much more environmentally friendly option, as it doesn’t contain gases that have Ozone depleting potential (ODP) or have global warming potential (GWP).

It is also compliant with the Code for Sustainable Homes, which has since been replaced by newer building regulations, but should still be honoured when constructing new domestic properties.

If you need any advice about how you can meet your environmental targets during construction, you can speak to our experts. You can call us on 01204 548 400 or send us an email and we’ll get back to you as soon as possible.

Can I order custom thickness JCW Stonefloor underfloor insulation?

JCW Stonefloor insulation is available in both standard and custom thicknesses, making it even easier to install in a range of projects.

The standard panel size is 1200mm x 600mm x 30mm but can be ordered in differing thicknesses if your project requires it.

To discuss your individual requirements, please contact our acoustic flooring team and we can get the ball rolling. You can call us on 01204 387 029 or fill in our Stonefloor enquiry form.

Does JCW Stonefloor underfloor insulation contain known carcinogens?


Unlike other mineral wool fibre insulations, JCW Stonefloor insulation is not classified as a possible human carcinogen.

Mineral wool insulation is constructed from molten glass, stone, or slag that is spun into a fibrous structure and is utilised to replace asbestos.

The main issue with mineral wool insulation relates to airborne fibres that can break off from the main structure. These small fibres break off, become airborne, and can be breathed in, causing health problems.

While no longer carcinogenic, insulation fibres can still be respiratory irritants that can damage the body. As such, installers should ensure they use appropriate PPE when installing JCW Stonefloor insulation.

For further technical information, reach out today. You can give us a call on 01204 548 400 or drop us an email and we’ll get back to you as soon as we can.

Call Now Button