Technical Overview

Application FOOT


The Acoustalay range offers the most cost effective solution available.  For home, office or commercial applications, we offer a range of products which are fully tested to industry standards and guaranteed for 10 years.

Thick photo

Thickness - Spot Levelling

Underlay needs to be thick and elastic enough to compensate for small protruding particles found on the smoothest of floors. By doing so, it prevents the creation of undesirable sound bridges and rocking caused by the new floor coming into contact with the sub-floor.

A minimum of 1.5mm thickness is recommended for moderately smooth structural floors. Beacons recommend a minimum of 1.8mm for normal use.

Multilay Filing Cabinet

Performance - Compressive Creep

Compressive creep is measured (being equal to thickness loss over time under a specified load) according to EN1606 and EN13163.

The value given in kPa is the maximum load which can be applied to the underlay so that the loss in thickness remains below 10% after 10 years loading time. This data is of particular importance in relation to heavy furniture. The higher the value the greater its ability to withstand heavy furniture.

Typical photo

Joint Protection - Compressive Strength

Compressive strength is measured at 0.5mm deformation according to acc. ISO 844 resp. EN13163.

A minimum value of 20kPs is advisable to prevent potential damage of the click or tongue and groove systems when puncture load is applied.  The higher the value the greater its resistance to tongue and groove damage.

Multilay Cup Fall

In-Room Sound Quality (Drum)

Drum sound (also called room, emitted or reflected sound) is defined as a perceived level of noise inside a room created by footsteps, falling toys and other impact sources.

The internal test methods adopted relate to the EPLF norm 021029-3.  Within the Acoustalay® range, the higher the rating (four star being the highest) the better the perceived noise improvement within the room.

Multilay High Heel

Transmitted Sound Reduction (Impact)

Impact sound Transmission of laminate flooring is measured according to ISO 140-8 using a tapping hammer on the floor.
Results are expressed as a single value called impact sound improvement index D Lw (dB) which describes the noise levels that would be heard in a room located underneath the floor - once with and once without the floating floor.
The higher the value the lower the noise level in the room underneath the floor.

Thermal Insulation - Resistance

Thermal resistance is measured according to ISO 11092:BS EN 31092 and is relevant if either underfloor heating is in use, or if heat loss is an issue.

With sub-floor embedded under floor heating the Acoustalay® will lie on top of the heated floor. According to EN1264 Part 3 Floor Heating – System & Components, the thermal resistance Rμ, B of all materials (underlay, laminate, wood etc.) laying on top of a heated floor should not exceed 0.150m2K/W to prevent unnecessary increase of the flow temperature of the heating system. So the lower the thermal resistance value of the Acoustalay® the greater the choice of flooring you have.

In the case of surface under floor heating (ribbon or wire type) the Acoustalay® will lie between the sub-floor and the heating system. In this case, with the Acoustalay® below the heating system it will provide an insulating layer against heat loss through the sub-floor and will not impede heat travelling through the floor into the room. Similarly, where under floor heating is not in use the Acoustalay® will provide an insulating layer against heat loss through the sub-floor. In either case a high thermal insulation value will be beneficial.

Moisture photo

Vapour Barrier (Moisture)

The European Producers of Laminate Flooring (EPLF) Code of Practice for the installation of laminate flooring recommends the Magnesium moisture test (CM) test for measuring relative humidity.
A maximum moisture content within a cement screed sub-floor must be kept to < 2.0CM % with a relative humidity not exceeding 60% RH.

To protect floors and to minimise the risk of possible damage from rising damp, use only Acoustalay® products with an integrated vapour barrier with waterproof joint sealing tape.

Acoustalay® products are tested to ISO 1663 (23ºC @ 0.50% RH) for moisture barrier performance. The EPLF code of practice requires a minimum thickness of 0.2mm of PE foil which equates to an SD Value (M) of 20.
All Acoustalay® products with an SD value of 20 or greater pass the EPLF requirements, eliminating the need for
additional barriers.

For areas where sub-floor moisture level is >4%, a damp proof membrane (DPM) should be used.

Moisture content of all mineral sub-floors (cement, screed floor, ceramic and stone tiling) can vary and needs to be ascertained.