Regupol E48 Acoustic Flooring

Soon to be known as REGUPOL sonus curve 8

Acoustic Flooring Material for Under Screed.

Regupol® E48 acoustic flooring material is a high performance recycled tyre crumb used for under screed and designed to isolate screeds from the main structure of the building reducing the impact energy generated by general footfall.

  • Regupol® E48 acoustic flooring material has been independently tested by UKAS and ANC Approved bodies in both the laboratory and on-site respectively to show compliancewith the new building regulations in accordance with Approved Document E 2003.
  • Approved by NHBC for ADE 2003 compliance.
  • Designed to reduce impact noise from high loads having a maximum load bearing capacity of 30kN/m2(3000kg/m2).
  • Excellent impact and airborne performance.
  • Offers long term performance without collapse or “bottoming” out under high point loads.
  • Minimal creep even under high loads.
  • Resistant to ageing and deformation.
  • Quick and easy to install. No need for separate perimeter strips.
  • Minimises construction heights.
  • High quality and exact material thickness guaranteed.
  • Suitable for use with underfloor heating.
  • Protects expansion joints.

Regupol® E48 acoustic flooring material is used under all types of floor screeds in most new build constructions such as; Apartments, schools, hospitals, hotels, libraries and supermarkets.

Roll Width
Roll Length
8mm nominal (dimpled surface on one side)

Regupol E48 acoustic flooring material conforms to the following specifications:

Impact sound insulation ∆Lw
Mean value of dynamic stiffness s’
Thermal conductivity
U value
(ISO 140-8 / ISO 717-2)
47 MN/m3
(DIN EN 29052-1)
0.14 W/mK
0.971 Btu/hr ft2
Fire classification
Maximum load bearing capacity
Airborne sound insulation (DnT,w + Ctr)
Impact sound insulation (L’nT,w (Ci))
B2 (DIN 4102)
3000 kg/m2 (30kN/m2)

* Building Regulations Approved Document E (2003) requirements 45dB or greater
** Building Regulations Approved Document E (2003) requirements 62dB or less

Important Steps Before Laying Regupol® E48 Acoustic Flooring Material

Prepare the base floor. It is important that the base floor is clean, (free      from loose dirt and concrete dust) flat, (within National Building Standards +/-5mm over a 5m span) and dry.

Unroll the Regupol®. When the product is rolled up it stretches slightly. Unwind each roll where it is to be installed and leave it for a few hours before measuring or cutting to length.

Please check that you have the correct number of Regupol® Corner Pieces. One Regupol® Corner Piece should be used for each internal corner.

Unroll the Regupol®. When the product is rolled up it stretches slightly. Unwind each roll where it
is to be installed and leave it for a few hours before measuring or cutting to length.

Laying Regupol® E48 Acoustic Flooring Material

The Regupol® must be laid dimple side down. Use a sharp craft knife and straight edge for cutting to size.

Position the Regupol® Corner Pieces into each of the internal corners, with the bottom folds laid flat on the sub-floor for stability purposes(see Fig. 1).

Unroll a full width piece of Regupol® E48 acoustic flooring material making allowance for the 100mm upturn at each end. Cut a 230mm x 230mm square piece from the Regupol® E48 acoustic flooring material in the corner that will overlap the corner piece. Move the Regupol® E48 acoustic flooring material to overlap the Regupol® Corner Piece and turn it up each wall by 100mm. Ensure that all overlapping edges are taped with Regupol® tape (see Fig. 2).

Overlap all joints (both along and across the roll) by at least 50mm and tape all joints using Regupol® tape only
(see fig. 3).

Turn up edges at walls to ensure the screed will not touch the walls and is of sufficient length to lap under the wall linings and skirtings (we recommend the length be 100mm) (see Fig. 4a).

Lay a waterproof membrane (eg. Visqueen), minimum of 0.2mm thick over the entire area (see Fig. 4b). Overlap all joints by at least 100 mm and tape all joints using Regupol® tape only.

You can now cast the screed taking the usual precautions to avoid damaging or moving the membrane and the Regupol® E48 acoustic flooring material.

Acoustic Corner Piece for Screeded Floors

Regupol® Corner Pieces have been specifically designed to isolate internal corners where floating screeds are used and will complement both Regupol® E48 and Regupol® 7210 acoustic underscreed materials, the former of which is now a proprietary product on Robust Details no. E-FC-6.

Regupol® Corner Pieces eliminate the worry associated with the cutting/fitting of acoustic materials into internal corners, which can be deemed as ‘weak’ spots.

Product Specification

Colour: Black.
Dimensions: 297mm x 197mm x 5mm c/w perforated sections


  • RD Approved when used in conjunction with RD No. E-FC-6.
  • Can be used with both Regupol E48 and Regupol 7210C acoustic underscreed materials.
  • Provides acoustic isolation of all internal corners.
  • Eliminates the need for accurate cutting of acoustic underscreed materials to fit the internal corners, hence saving time and labour costs.
  • Supplied in easy to handle pads with perforated tabs for ease of application.
  • Very stable and requires no additional restraint prior to the casting of the screed.
  • Very simple to install. Please refer to guidelines.
  • Provides the installer with total piece of mind.
  • A very simple and cost effective solution.
Acoustic Flooring Solution at the Shard

The Shard

CMS Danskin: Putting the ‘Shhh’ in the Shard

Pure Gym has recently opened a brand-new facility in Canterbury. The gym hosts over 220 pieces of state-of-the-art equipment, including cardio apparatus, treadmills, rowers and spin bikes. Customers also get to benefit from a free weights zone and a fixed weights area, as well as access to a multitude of fitness classes.

When CMS Danskin Acoustics Limited was engaged by Progressive Group to ensure the Shangri-La Hotel’s 42 floors in the Shard were effectively soundproofed, it wasn’t a straightforward assignment. From the very first sketches drawn on a napkin by Piano during dinner with entrepreneur and property developer Irvine Sellar, the Shard was always intended to be ‘all about the windows’, with expressive façades of angled glass reflecting sunlight and the sky, and affording 360° views of the city.

Unfortunately, when the glazing is central to the design, floors can get in the way of the overall effect, and the temptation is to minimise floor heights (within Building Regulation parameters, of course). This presents a significant challenge to acoustic insulation installers. In short, the thinner the floor, the harder the soundproofing material has to work acoustically and the more physical punishment it has to endure.

For approximately 70% of the floors, Progressive applied a Gyvlon liquid screed at a 40mm minimum thickness. The screed was pumped from ground level, with the largest pour in excess of 80m3 covering an area of 1,680m2. In approximately 30% of the floor areas, however, the floor screeding level could not be raised because of the existing floor-level transom in the curtain walling. This meant that there were instances of screed thicknesses of approximately 25mm in places.

CMS Danskin’s Regupol E48 was specified, a Robust Detail approved (E-FC-6) high-performance screed isolation material. E48 was perfect for those ‘thin screed’ areas, with its maximum load bearing capacity of 3000kg/m3 (30kN/m2), combined with a mean average impact sound insulation performance of 46dB and a mean average airborne sound insulation performance of 49dB, both values well in excess of the requirements of Part E of the Building Regulations.

Building Regulations aside, E48’s ‘over-performance’ is crucial for a hotel as exclusive as the Shangri-La. The award-winning, globe-spanning hotel group prides itself on providing a customer-focused experience, with the emphasis very much on luxury. Intrusive noise from above or below a guest’s accommodation would almost certainly undermine those efforts. Plus, with this being a flagship project for the Shangri-La – their first hotel in Europe – ‘fit for purpose’ simply wasn’t an option.

As a Robust Detail underscreed, E48 has already been rigorously pre-tested to ensure it achieves a minimum performance of 5dB over and above Part E, thus eliminating the need for Pre-Completion Testing. However, CMS Danskin and Progressive, having worked together successfully on the exclusive One Hyde Park development, preferred to adopt a partnership approach, with the emphasis on planning and testing, giving absolute certainty to all parties and making full use of all the skills, expertise and experience at their disposal. To this end, Paul Absolon, CMS Danskin’s Technical Director, worked closely with Progressive’s technicians, carrying out off-site simulations and fitting trials with varying screed thicknesses. Only once both parties were satisfied with every aspect of E48’s acoustic performance in a ‘real world’ situation did the installation proceed.

More than 16,000m2 of E48 were installed over approximately 3 months, with Progressive and CMS Danskin maintaining their close working relationship throughout.

Tony Cooney, Estimating Manager at Progressive Group, said, “The completion of the screed and insulation work on the Shangri La Hotel development was a fantastic achievement and it presented a number of very challenging situations – both technical and logistical. Solutions to these challenging situations are achieved by the co-operation of all parties involved – including material suppliers. The technical assistance provided by CMS Danskin on this Shangri-La project and other prestigious contracts in the London region in recent years has been exceptional and we look forward to continuing our excellent relationship.”

Said Paul Absolon, “It was a privilege working on a project as ground-breaking and culturally significant as The Shard, and it was a pleasure working with the professionals at Progressive Group again. At CMS Danskin, we like to be put to the test. The Shard certainly was a challenge and we’re proud to have met that challenge and delivered.”