performance flooring underlay - antalis packaging€¦ · the concept for this underlay is to make...

Combilay is a range of key quality flooring products at competitive prices.

Featuring a wide choice of multi-purpose underlays to suit all laminate, engineered and solid wood floors.

The selection is led by our cross-linked foam underlays that combine thermal and sound insulation with damp proof performance.

PERFORMANCE FLOORING UNDERLAY

Combilay-UltraCombilay-Multi Combilay-WhiteCombilay-SilverCombilay-Gold

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Combilay Foam Underlays from Antalis are technically and visually high quality underlay materials for solid, engineered, parquet and laminate floorings, and offer safe and durable impact sound insulation and superior compression strength properties at low thicknesses.

The Combilay range is led by the Ultra and Multi options, which are resilient, soft, elastic, physically cross-linked, closed-cell polyolefin foams with an ultra smooth premium quality surface.

Features Benefits

Physicallycross-linkedpolyolefin foams

• Good long-term static creep performance• Do not crumble or produce dust• Chemically inert, non rotting• Easy to cut• Lightweight packs, easy to carry

Closed-cellstructure

• Negligible water absorption• High water vapour diffusion resistance

Low echoing• Good room sound comfort• Reduced drum sound

Perfectly flat with smooth surface

• Easy positioning and laying of flooring• Good conformability• Exceptional appearance• Free of undulations and waves

Highly Elastic• Good impact sound insulation performance• Levels out uneven surfaces• Can be stepped on during laying

Thin • No expensive door adjustments required


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Call 0191 414 6626 for more information2

What are cross-linked foams?

Combilay Ultra and Multi underlays are manufactured from cross-linked foams. Cross-linking is a process that transforms the cells to become rounder and more resilient. In addition, the cells are interwoven, resulting in a material with a vastly improved life and recovery from compression.

Many of its unique properties are based on the physical cross-linking of the polyolefin chains resulting in a 3-dimensional polymer network.

• Excellent acoustic, mechanical and chemical properties • No odour (even food and medical approved) • Lightweight, excellent weight / performance ratio • Environmentally friendly

Odour / VOC - Combilay cross-linked foam underlays are based on polyolefin resins known to be free of any annoying odours or smells. The total amount of volatile organic components (VOC) is extremely low when compared to other underlay materials.

Inertness – Combilay cross-linked foam underlays are based on polyolefin resins and thereby inert against the impact of humidity and chemicals. The material is resistant against mould and mildew and does not deteriorate or rot.

Migration – Combilay cross-linked foam underlays are produced without plasticisers which could cause negative migration effects (eg. Adhesive problems between laminate and underlay material or negative visual changes of the laminate surface).

Dangerous substances – Combilay cross-linked foam underlays fulfil the requirements of 76/769/EC (dangerous substances) including its 24th amendment 2003/11/EC, 2002/72/EC (plastic materials in contact with foodstuffs) and complies with the requirements of the European directive 2002/95/EC (restriction of hazardous substances, ROHS). They are free of heavy metals and fulfil 94/62/EC ‘Packaging Directive’ (cumulative concentration of lead, cadmium, mercury and hexavalent chromium is less than 100 ppm).

Surface quality – Combilay cross-linked foam underlays have an ultra-smooth and soft elastic surface. A protective interlayer, to prevent abrasion to the laminate caused by vibration during transportation, is therefore not required.

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Visit: www.antalis.co.uk/combilay 3

Combilay-Ultra is a physically cross-linked closed cell polyolefin foam underlay, specially designed and developed for use under all laminate and solid wood floors. It combines thermal and sound insulation with damp proof performance.

Combilay-Ultra has excellent drum sound and impact sound properties. Its outstanding compressive creep performance makes it suitable for use in residential homes.

Combilay-Ultra’s 3mm thickness is particularly suitable where a relatively rough structural floor needs to be levelled out.

Call 0191 414 6626 for more information

Impact sound reduction

Drum sound improvement

Physically cross-linked polyolefin foam

Closed cell structure

Conformable, smooths irregular surface

Shock absorbent

Dust free, no odour, allergy friendly

Anti fungal, mildew resistant

Easy to lay

Lightweight and elastic, will not break

Firm cushion support for improved comfort

Ultra smooth, soft quality surface

Withstand high weight surface loads

Suitable for underfloor heating systems

No Damp Proof Membrane required

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Visit: www.antalis.co.uk/combilay

Easy to install:

1. Combilay-Ultra must be laid on a flat surface which is dry, firm and level.

2. Roll out the underlay at 90o to the direction of the floor installation.

3. Butt the edge of the next row tightly to the first, ensuring that they do not overlap, and carefully tape the joints using Combilay-Tape.

It’s as easy as 1-2-3 Available in three different roll lengths and also in a 10m Z-folded pack.

Technical Performance Data:

Property Value Standard

Thickness 3mm EN 823

Reflected Walking Sound 7% EPLF working draft 021029-5 F1

Impact Sound Improvement* 19dB ISO 140 / ISO 717

Compressive Strength at 0.5mm deflection ≥ 20kPa EN 826

Compressive Creep** 2kPa EN 1606

Water Vapour Diffusion*** 15m EN 12086

Thermal Resistance at 24oC 0.089m2 K/W EN 12667 / EN 12664

*Impact Sound Improvement as measured under 7mm laminate flooring.

**Under long term static load max. thickness loss of 0.5mm extrapoulated to 10 years.

***Water vapour diffusion equivalent air layer thickness Sd (23oC, 0-50% rel.hum). The given values are valid for the foam sheet only and when the butted joints are carefully taped.

Combilay-Ultra

Description Width Length Unit Weight Pack Qty Colour

Ultra 10m2 roll 1.02m 9.8m 0.66kg 20 per pallet Grey

Ultra 10m2 Z-fold pack 1.02m 9.8m 0.66kg 40 per pallet Grey



3mm 7% 19dB ≥ 20kPa Cross-linked0.89m215m2kPa

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Combilay-Multi adhesive underlay is the next generation in underlay for engineered and solid wood floors. It is a sound reducing, thermal insulating underlay incorporating a strong adhesive coating, which will change the way fitters install real wood floors in the home or commercial place.


Drum sound improvement

Physically cross-linked polyolefin foam



Shock absorbent



Easy to lay

Lightweight and elastic, will not break

Firm cushion support for improved comfort

Ultra smooth, soft quality surface

Withstand high weight surface loads


Adhesive back for strong & quick application

No Damp Proof Membrane required

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- MultiTM


Combilay-Multi is a closed cell cross linked polyolefin plastic foam underlay with an adhesive on one side protected by a polythene membrane. The concept for this underlay is to make real wood floor installation a project achievable to the DIYer and adding speed to the trade fitter reducing time on jobs. It is estimated that you will save 60% - 70% of time over traditional installation techniques.

How does it work?

Combilay-Multi adhesive underlay works by adhering to the flooring being installed and keeping it in place. It’s flexibility allows the floor to expand and contract naturally without unsightly gaps appearing. There is no longer the need for expensive tools and machinery to install solid and engineered real wood flooring. Secret nailing, gluing and clips are a thing of the past.

1. The floor planks are laid on top of the polythene membrane. 2. The membrane is peeled back. 3. The boards are then stuck to the underlay.

It’s as easy as 1-2-3


Property Value Standard

Thickness 3mm EN 823

Reflected Walking Sound 7% EPLF working draft 021029-5 F1

Impact Sound Improvement* 19dB ISO 140 / ISO 717

Compressive Strength at 0.5mm deflection ≥ 20kPa EN 826

Compressive Creep** 2kPa EN 1606

Water Vapour Diffusion*** 15m EN 12086

Thermal Resistance at 24oC 0.089m2 K/W EN 12667 / EN 12664

*Impact Sound Improvement as measured under 7mm laminate flooring.

**Under long term static load max. thickness loss of 0.5mm extrapoulated to 10 years.

***Water vapour diffusion equivalent air layer thickness Sd (23oC, 0-50% rel.hum). The given values are valid for the foam sheet only and when the butted joints are carefully taped.

Combilay-Multi

Description Width Length Unit Weight Pack Qty Colour

Multi 10m2 roll 1m 10m 0.66kg 20 per pallet Black




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3mm 7% 19dB ≥ 20kPa Cross-linked0.89m215m2kPa

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Low density, micro-cellular, closed-cell, non cross-linked polyethylene foam. The low cost alternative quality performance underlay for all floor types.


Property Value

Impact Sound Reduction: 18dB

Compressive Creep: 18.3%

Water Vapour Permeability: 7.5g/m2

Thermal Conductivity: 0.058W/mK

The given values for water vapour permeability are valid for the foam sheet only and when the butted joints are carefully taped.

Combilay-White

Description Thickness Width Length Unit Weight Pack Qty Colour

Combilay-White Foam 2mm 1m 15m 0.48kg 5 rolls White

Other sizes are available

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Easy to lay

Lightweight and elastic

Shock absorbent





- WhiteTM


Low density, micro-cellular, closed-cell, non cross-linked polyethylene foam, with a silver or gold metalised damp proof membrane. Also features a 200mm overlap, to assist in laying.

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Property Value

Impact Sound Reduction: 19dB

Compressive Creep: 18.3%

Water Vapour Permeability: 7.5g/m2

Thermal Conductivity: 0.088W/mK

The given values for water vapour permeability are valid for the foam sheet only and when the butted joints are carefully taped.

Combilay-Silver/Gold


Combilay-Silver 3mm 1m 15m 1.1kg 5 rolls Silver

Combilay-Gold 3mm 1m 15m 1.1kg 5 rolls Gold

Other sizes are available



Easy to lay

Lightweight and elastic

Shock absorbent





Water/moisture barrier lock + overlap

- Silver/GoldTM


Visqueen BBA Damp Proof Membrane is a 250 micron blown film of extruded low-density polyethylene that can be used in conjunction with Combilay-White foam to ensure extra protection against humidity.

Moisture barrier

Lightweight



Quality, smooth polythene

Easy to lay

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Combilay-DPM


Combilay-DPM 250µm 3m 4m 2.82kg 1 sheet Clear

30 micron

24 rolls per box

Water resistant

Class 0 fire-rated

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30 micron aluminium tape with excellent adhesion. Water resistant and class 0 fire-rated. Ideal for use with all Combilay flooring products.

Combilay-Tape


Combilay-Tape 30µm 50mm 46m 0.4kg 24 rolls Silver

- Tape

- DPM

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Combilay Technical Performance Symbol & Data Guide

Combilay cross-linked foams are tested to several European standard classifications:

Thickness – Conformability When choosing an underlay, it is important that the material is thick enough and yet elastic enough to conform should the floor be uneven or if there is any small protruding particles left on the surface of the floor. All Combilay cross-linked foams are conformable so prevent the creation of unwanted sound bridges or cavities, thus giving a level surface on which to lay the floor.

Reflected Walking Sound Reflected sound (also called room, emitted or drum sound) is principally defined as a perceived level of noise inside a room created by impact sources such as footsteps or dropped objects.

Various test methods are currently under evaluation to determine both subjective and objective drum sound levels.

Impact Sound Improvement Impact sound improvement (also called Transmitted Sound Reduction) of laminate flooring is measured according to ISO 140 standard by using a tapping hammer against the floor.

The results is a value known as an impact sound improvement index ∆Lw (dB) which describes the differing noise levels in a room located underneath, once with and once without a floating laminate floor. The higher the value the lower the noise level in the downstairs room.

Compressive Strength Using EN 826 standard, the compressive strength of Combilay cross-linked foams are tested at 0.5mm deformation. A minimum value of 20kPa is recommended to prevent potential damage to the tongue and groove system (click or non-click laminate) when puncture load is applied.

Compressive Creep Compressive creep is the loss of thickness over time under a specified load, and is measured according to EN 1606 standard. The value, measured in kPa, refers to the maximum load which can be applied to the foam to ensure that the loss in thickness remains below 10% after 10 years loading time.

Water Vapour Diffusion The water vapour barrier value of a material is the product of the diffusion resistance to water vapour passage and the thickness (sd = µ*d), and corresponds to the equivalent air layer thickness (m). With vapour permeable materials, sd values are lower than 0.05 m, while with vapour obstacles, the sd values are in the range 0.05 to 10m; vapour barriers are characterised with sd values exceeding 10m.

All Combilay cross-linked products are tested according to EN 12086 standard (23ºC at 0-50% relative humidity), and give an sd value of at least 15m, eliminating the necessity for additional moisture barriers.

Thermal Resistance The thermal insulation or resistance of the underlay is particularly important if using underfloor heating. The standards used are EN 12667 and EN 12664 at 24ºC.

According to EN 1264 part 3 – Floor Heating – System and Components, “the thermal resistance of Rl,B of all materials (underlay, laminate, carpet, etc.) laying on top of a heated floor should not exceed 0.150m2K/W to prevent an unnecessary increase of the flow temperature of the heating system.”

Indicates cross-linked foam

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Impact sound transmission 19dB 19dB 18dB 19dB

Compressive strength ≥ 20kPa ≥ 20kPa

Compressive creep 2kPa 2kPa 18.3% 18.3%

Water vapour diffusion 15m 15m 7.5m 7.5m

Thermal resistance (m2 K/W) 0.089 0.089 0.058 0.088

Drum sound improvement 4 4

Physically cross-linked polyolefin foam 4 4

Closed cell structure 4 4 4 4

Conformable, smooths out irregular surface 4 4 4 4

Shock absorbent 4 4 4 4

Dust free, no odour, allergy friendly 4 4 4 4

Anti fungal, mildew resistant 4 4 4 4

Easy to lay 4 4 4 4

Lightweight and elastic, will not break 4 4 4 4

Firm cushion support for improved comfort 4 4

Ultra smooth, soft quality surface 4 4

Withstand high weight surface loads 4 4

Suitable for underfloor heating systems 4 4 4 4

Adhesive backing for strong & quick application 4

Water/moisture barrier lock and overlap 4

No damp proof membrane required 4 4

Combilay- Multi

Combilay- Ultra

Combilay- Silver/Gold

Combilay- White

Antalis Ltd Tundry Way, Chainbridge Road, Blaydon-on-Tyne, NE21 5ST Tel: 0191 414 6626 Fax: 0191 414 6627 Email: [email protected]

Product comparison

Combilay multi-purpose barrier underlays are ideal for all laminate and solid wood floors.

Our highly advanced manufacturing techniques have produced a combination of thermal and sound insulation, with most also offering damp proofing properties.

Floors must always be laid according to manufacturing guidelines. Joins between each strip of underlay must always be taped or sealed to maintain damp proof performance.

Test results are taken from average values and are therefore only presented as a guideline.

Combilay underlays are combustible and should not be exposed to flame or other sources of ignition.

v1 Sep 14


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performance flooring underlay - antalis packaging€¦ · the concept for this underlay is to make...

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