Resilient 250

Resilient 250 is a high performing acoustic resilient layer that has been designed to significantly reduce impact sound. It can be used as used as a Soft Floor Covering or as an Acoustic Underlayment.

Why Resilient 250?

Resilient 250 is quick and easy to work with and can be used with a wide range of floor coverings, providing exceptional acoustic performance to the finished installation. Being manufactured from sponge rubber, it provides long-lasting durability and strong resistance to foot traffic, following installation of the floor covering. Resilient 250 exceeds the requirements for a Soft Floor Covering in Approved Document E (England & Wales), Technical Booklet G (Northern Ireland) and Section 5 of the Building Standards in Scotland.

Product Leaflet Download

Resilient 250 Components

Features & Benefits

  • Achieves Approved Document E performance standards for Floor Type 1
  • Significantly reduces impact sound at source
  • Suitable for a variety of floor finishes
  • Forgives minor subfloor imperfections
  • Minimises subfloor preparation
  • Can be installed over existing floor coverings without causing damage
  • Quick and easy to install
  • Will not deteriorate or collapse over time
  • Can be used with underfloor heating systems
  • Green Label Plus accredited for indoor air quality and low VOC emissions

Achieves Approved Document E performance standards for Floor Type 1.

Green Label Plus accredited for indoor air quality and low VOC emissions.

Acoustic Performance*

(no floor coverings and no ceiling below)

Measured improvement of impact sound (ΔLw) BS EN ISO 10140-3:2010
19 dB
Impact Insulation Class ASTM E989-21
IIC 51 / ΔIIC 23

Acoustic Performance*

(with floor covering and no ceiling below)

Luxury Vinyl Tiles (2.5mm) 20 54 24
Luxury Vinyl Tiles (4.5mm) 20 54 24
Luxury Vinyl Tiles (5mm) 21 55 25
Sheet Vinyl (2mm) 18 51 22
Linoleum (2.5mm) 18 52 22
Laminate (8mm) 18 52 22
Engineered Wood (14mm) 17 51 21
Carpet Tile (Bitumen Backed) 30 64 30
Ceramic Tile (9mm) 17 50 21

* Tested on a 140mm / 5½” thick concrete floor.

Acoustic Performance†

(with floor covering and suspended ceiling)

Luxury Vinyl Tiles (4.77mm) 91 73 65
Luxury Vinyl Tiles (5mm) 92 72 64

†Tested with a floor-ceiling assembly - 152mm / 6” thick concrete slab.

Resilient 250 Applications

Resilient 250 is widely used in developments where high levels of acoustic performance are required. It is therefore used in applications requiring compliance with Approved Document E – Floor Type 1 (concrete base with ceiling and soft floor covering). It must be bonded to the subfloor to comply with Approved Document E.

Apartments and Hotels
Commercial Developments

Resilient 250 Usage

As an acoustic underlay, Resilient 250 can be used below the following types of floor coverings.

  • Luxury Vinyl & SPC Tiles / Planks ≥ 2.5mm
  • Woven Vinyl Tiles / Planks
  • Loose Lay Vinyl & SPC Tiles
  • Laminate
  • Engineered Wood
  • Solid Wood
  • Bamboo
  • Parquet Flooring
  • Carpet Tiles
  • Broadloom Carpet
  • Natural Floor Coverings
  • Ceramic / Porcelain / Natural Stone Tiles

Product & Technical Information

Full technical specifications can be downloaded below.

Technical Specification Download
Installation Instructions (Loose Laid to Subfloor) Download
Installation Instructions (Bonded to Subfloor) Download
Product construction
Sponge rubber
Bonding agent
Synthetic rubber
Product thickness
2.40kg/m2 / 0.49 lb/ft2
960kg/m3 / 59.9 lb/ft3
Roll size
1.37m x 7.30m / 4’ 6” x 23’ 11½”
10m2 / 107.6ft2
Roll weight
24.0kg / 52.9 lb
Measured improvement of impact sound (ΔLw) BS EN ISO 10140-3:2010
19 dB
Impact Insulation Class (IIC) ASTM E989-21
Reaction to Fire Test performed on RS250 with no floorcovering
Class BFL-s1
Crack Resistance
High Performance
Thermal Resistance (R)
0.23 Togs
Temperature resistance
-40°C to +110°C

Installation Points to Note

The area of installation must be dry, smooth, dirt and dust free and weather tight.
The subfloor must be sound and sufficiently level, with no imperfections protruding through Resilient 250. If not, then a self-levelling screed may be required.
When bonding to bare concrete, a suitable concrete sealer is recommended to ensure maximum adhesive coverage and bond strength
If moisture levels exceed 75% RH, seal the area with a suitable primer.
Sonixx SX900 adhesive should be used to permanently bond Resilient 250 to the subfloor.
Where possible, the skirting board should be installed above Resilient 250, in order to reduce flanking sound transmission.
When installing ceramic tiles, stone and vinyl flooring, leave at least a 3mm gap around the perimeter, which should be filled with a flexible sealant.

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