Regupol 4515 Multi Acoustic Underlay

Regupol acoustic flooring materials have been used successfully in such high-profile and diverse projects as The Shard and the Sterling-prize winning Everyman Theatre, the exclusive Four Seasons Hotel and the Royal Shakespeare Theatre, as well as Waitrose and Sainsbury’s supermarkets. To find out how Regupol will work for your project, call 01925 577711.

Regupol® 4515 Multi is a tough resilient acoustic underlay manufactured from PUR Foam and cork granules and is ideally suited to all new build type constructions to comply with Part E 2003 and can be bonded to all types of floors.

Regupol® 4515 Multi acoustic underlay is compatible with all types of floor finishes including ceramic tiles sheet vinyl and vinyl tiles wood and laminates carpet and marmoleum/linoleum.

  • Independently tested under laboratory controlled conditions and on-site using UKAS accredited. and ANC approved bodies respectively to show compliance with the new building regulations in accordance with Approved Document E 2003. When used in acoustic floors under Part E of the Building Regulations and Robust Details is accepted by the NHBC.
  • Highly sustainable and completely recyclable.
  • Offers long term performance without collapse or “bottoming” out under high point loads.
  • Resistant to ageing and deformation.
  • Quick and easy to install. Simply bond to the subfloor beneath the final floor finish.
  • Reduces construction heights.
  • Suitable for both new build and refurbishments.
  • High quality and exact material thickness guaranteed.
  • Suitable for use with under floor heating.
  • Very comfortable under foot.
  • Suitable for all floor finishes including ceramic/stone tiles.
  • Due to no rubber content Regupol® 4515 Multi acoustic underlay does not cause plasticizer migration when used with certain adhesives and floor finishes such as vinyl linoleum and light coloured carpets.

Regupol® 4515 Multi acoustic underlay is ideally suited to a wide range of floors and floor finishes.

With Regupol® 4515 Multi acoustic underlay laid on all floor types, all constructions pass the performance requirements as quoted in ADE 2003. We are happy to supply further information and independent test certificates on actual performance figures, please contact us direct.

*Diagrams for example purposes only

Regupol 4515 Multi Acoustic resilient Layer for In-Situ Concrete Slab Floor
Roll Width
Roll Length
3mm & 4.5mm
Non standard lengths available on request

Regupol® 4515 Multi acoustic underlay conforms to the following specifications:

Tensile strength
(DIN 53571)
Elongation at break (DIN 53571)
Thermal conductivity
Caloric conductivity
Building class
Thermal resistance (DIN 52612)
Approx. 0.9 N/mm2 (4.5mm material)
Approx. 25%
Approx. 0.12 W/mk
1/λ = 0.049 K/W
 center>strong>Impact sound insulation ΔLw (measured in accordance with BS EN 140-8:1998)/strong>center>
center>18dB Regupol® 4515 Multi acoustic underlay on its owncenter>
center>34dB Regupol® 4515 Multi acoustic underlay beneath carpetcenter>
center>22dB Regupol® 4515 Multi acoustic underlay beneath flotexcenter>
center>18dB Regupol® 4515 Multi acoustic underlay beneath marmoleum/linoleumcenter>
center>19dB: Regupol® 4515 Multi acoustic underlay beneath ceramic tilescenter>
center>18dB: Regupol® 4515 Multi acoustic underlay beneath vinyl flooringcenter>
center>Up to 20dB: Regupol® 4515 Multi acoustic underlay beneath vinyl LVTcenter>

Regupol® 4515 Multi acoustic underlay can be used over a range of subfloors and with a variety of floor finishes applied such as:

  • Ceramic Tile
  • Wood & Laminate
  • PVC Flooring
  • Carpet
  • Marmoleum/Linoleum
  • Vinyl

Please refer to the correct PDF installation data sheet for your choice of floor covering. Just click on the ‘Downloads’ tab.

All diagrams are for example purposes only.

CMS Bond 100 High Performance Acoustic Sealant for Use with Regupol® 3912 Acoustic Underlayment

CMS Bond 100 is a solvent free low VOC high performance water based acrylic dispersion with very good bond strength. It is suitable for plasticized vinyl floor coverings (including PVC tiles) together with high density foam backed carpets.


CMS Bond 100 is distributed in the UK by CMS Danskin Acoustics. The adhesive manufacturer will guarantee the performance and quality of products against manufacturing defects provided they are used in accordance with our relevant Technical Data Sheets at the time of installation and the appropriate sub floor preparation has been undertaken in accordance with the relevant British Standards.

Floor covering manufacturers are constantly introducing new backings and improving their current products. Certain backings may have unique characteristics which may influence the choice of adhesive used. Whilst every effort has been made to ensure the information is correct at the time of publication it is the responsibility of the user to ensure that the product is suitable for the particular installation.
If there is any doubt as to the use of our adhesives the installer should contact CMS Danskin Acoustics for advice or carry out their own tests to ensure compatibility.

Important steps before you lay CMS Bond 100 – Surface Preparation

Suitable sub-flooring substrates include concrete, flooring grade hardboard, plywood, chipboard, sand/cement screed, proprietary good quality self-smoothing underlayments. Asphalt and surface membranes should be treated with at least a 3mm coating of the latter before applying the adhesive.

Site conditions should comply with the latest British Standards editions: BS 8102 (Code of Practice for protection against moisture from the ground), BS 8203 (Code of Practice for installation of resilient floor coverings), BS 5325 (Code of Practice for installation of textile floor coverings), BS 8204 part 1 (Code of Practice for installation of self levelling screeding compounds), and supplementary specifications.

Surfaces must be level, firm and clean, free of loose material, mould, oil, grease, organic growth and surface moisture (under 75% RH).

Uneven, dusty or friable surfaces should be treated with the appropriate universal primer and screed.*

It is essential that suitable damp proof membranes be in place to prevent rising damp.*

Under floor heating should be turned off for at least 48 hours prior to and after application.

Particular attention must be paid to the floor covering manufacturer’s instructions. i.e. any pre storage conditions prior to fitting.

*Please contact CMS Danskin for further information.


CMS Bond 100 is a ready to use versatile product and should not be diluted or adulterated in any way.


Use a notched trowel of dimensions 1.5mm x 5mm or as CFA guidelines.

Heavy textured floor coverings may require a larger towel.

Apply adhesive evenly to the substrate and depending on the substrates lay the floor covering while still wet. It is best to allow the freshly applied adhesive to stand for 15-45 minutes depending on the ambient conditions, to build tack before embedding the floor covering.

Press firmly into place and rill using a 60/70Kg roller or glider depending on material used. Roll again approximately 1 hour after application.

Wait at least 24 hours before welding vinyl seams.

Removal of adhesive from tools

Clean tools with water if adhesive is still wet or use white spirits if it has dried.

Product Specification
ColourOff White
ConsistencyTrowelable Mastic
Open Time15 minutes plus depending on site conditions: Temp, humid & surfaces to be treated
Specific Gravity1.2
Shelf Life12 months if stored between 5-30°C in a dry area, in original unopened containers.
Protect from frost.
Product Technical Information
CuringHigh humidity, a low temperature and poor ventilation will retard the drying speed
Coverage3m2/kg depending on the porosity of the substrate and thickness of the adhesive film.
Acoustic underlay

Four Seasons Hotel

The Challenge

The extensively refurbished Four Seasons Hotel London at Park Lane required an acoustic underlay solution to effectively control impact sound with the marbled tiled floors of its guest bathrooms. Due to the prestigious nature of the hotel, superior impact sound attenuation needed to be achieved to exceed Part E requirements.

Furthermore, having undergone a vast refurbishment programme the Four Seasons Hotel London now accommodates eight floors of guest rooms, so as well as attenuation of impact sound between floors it was necessary for the acoustic treatment to be easy to handle and install.


The Solution

The extensively refurbished Four Seasons Hotel London at Park Lane required an acoustic underlay solution to effectively control impact sound with the marbled tiled floors of its guest bathrooms. Due to the prestigious nature of the hotel, superior impact sound attenuation needed to be achieved to exceed Part E requirements.

Furthermore, having undergone a vast refurbishment programme the Four Seasons Hotel London now accommodates eight floors of guest rooms, so as well as attenuation of impact sound between floors it was necessary for the acoustic treatment to be easy to handle and install.


The Result

Achieving high levels of impact sound attenuation with a tiled floor finish, Regupol® 4515 Multi exceeds the minimum requirement of 62dB or less specified by Part E regulations.

Russell Coleman, senior project manager, Beck Interiors, commented: “As one of the finest examples of a world class hotel we needed complete peace of mind that the acoustic flooring solution we applied in the guest bathrooms provided more than effective impact sound isolation, especially with the marble floor finish. The technical support that we received from CMS Acoustics in order to specify Regupol® 4515 Multi was excellent, with a member of the technical team taking the time to visit the site.”

Regupol 4514 Gateway Leeds

Gateway Leeds Acoustic Underlay Case Study

CMS Danskin were able to provide Regupol 4515 to the prestigious new Gateway project in central Leeds. As the city centre’s largest residential project to date, it has also provided the area with a luxury landmark.

In keeping with high-end living, the interior design of the new build project incorporated a number of characteristic atrium and foyer spaces. While this lack of uniformity gave the building and its apartments an impressive level of individuality, it also created irregular shaped rooms which were difficult to work with from a finishing perspective.

The finish of the apartments incorporated tiles throughout all of the bathroom and shower areas. To comply with Part E impact sound regulations, an acoustic flooring system had been specified for use under the tiled floor finish. However, when the tile fitters began installation, a number of challenges emerged.

Phil Johnson, building development manager at Aqua Interiors, explains:

“The acoustic matting and adhesive combination we were initially using at The Gateway caused us a few problems. There were issues from the tile fitters regarding application of the adhesives, and the over flexibility of the system meant that the grouting was cracking and crumbling once the surface was subjected to weight and traffic.” As the tiling contractors were already on-site, a reliable alternative that would meet Part E standards for impact sound had to be sourced and delivered against extremely tight timescales.

The Solution

As the only acoustic tiling system on the market to comply with the UK Tiling Association’s (TTA)

Coefficient of Restitution figure (0.56), a test method to assess the impact resistance of ceramic floor tiling, Regupol Acousti-Tile was identified as the best solution to overcome the difficulties being experienced at The Gateway.

The main component in the Regupol Acousti-Tile system is Regupol 4515 Multi, a high performance acoustic underlay which isolates impact sound at source. Regupol 4515 Multi, which can be used with any finish, is first bonded to the construction’s base floor using Ardex AF200.

Tiles are then laid on top of Regupol 4515 Multi using BAL Acousti-Bond adhesive. The acoustic tiling system is completed by filling in the joints using an appropriate grout finish, which is dependent upon whether the base floor is concrete or timber.

As a complete acoustic tiling system, all components of Regupol Acousti-Tile are delivered to site in a single delivery. Regupol 4515 Multi and the complete Regupol range is available exclusively in the UK through CMS Acoustics.

The Result

The quality of the finished bathroom environments is in keeping with the ambition and attention to detail of The Gateway project overall. By installing Regupol

Acousti-Tile, Aqua Interiors has ensured that the impressive tiled floor surfaces will not cause residents disruption because of excessive noise transfer between dwellings.

Having undergone independent site trials, Regupol Acousti-Tile has been shown to achieve an impact sound value of up to 52dB, which is significantly less than the 62dB required by Part E of the Building Regulations.

Johnson concludes: “All of the environments were around 4-5m², but there was a great deal of variation in the room shapes and sizes, meaning there were some changes to the setting once we were on-site.

Regupol Acousti-Tile was versatile enough to cope with any changes we made – the Regupol 4515 Multi element was easy to trim and shape while BAL Acousti-Bond offered the same.