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ENVOY OVERVIEW
All Envoy 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.
| Product comparison Chart |
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| Impact sound transmission |
SL30
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22dB
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22dB
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18dB
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18dB
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18dB
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18dB
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| Compressive strength |
28kPa
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28kPa
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28kPa
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| Compressive creep |
3kPa
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3kPa
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3kPa
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18.3%
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18.3%
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18.3%
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18.3%
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| Water vapour diffusion |
>100m
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21m
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21m
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7.5m
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>100m
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7.5m
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7.5m
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| Thermal resistance (m2 K/W) |
0.088
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0.088
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0.088
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0.058
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0.058
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0.088
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0.088
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| Drum sound improvement |
✔
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✔
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✔
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| Physically cross-linked polyolefin foam |
✔
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✔
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✔
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| Closed cell structure |
✔
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✔
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✔
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✔
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✔
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✔
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✔
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| Conformable, smooths out irregular surface |
✔
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✔
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✔
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✔
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✔
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✔
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✔
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| Shock absorbent |
✔
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✔
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✔
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✔
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✔
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✔
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✔
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| Dust free, no odour, allergy friendly |
✔
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✔
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✔
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✔
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✔
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✔
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✔
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| Anti fungal, mildew resistant |
✔
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✔
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✔
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✔
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✔
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✔
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✔
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| Easy to lay |
✔
|
✔
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✔
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✔
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✔
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✔
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✔
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| Lightweight and elastic, will not break |
✔
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✔
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✔
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| Firm cushion support for improved comfort |
✔
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✔
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✔
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| Ultra smooth, soft quality surface |
✔
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✔
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✔
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| Withstand high weight surface loads |
✔
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✔
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✔
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| Suitable for underfloor heating systems |
✔
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✔
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✔
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✔
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✔
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✔
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✔
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| Adhesive backing for strong & quick application |
|
✔
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✔
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| Water/moisture barrier lock and overlap |
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✔
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✔
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✔
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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 - Envoy 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 – Envoy Foams are based on polyolefin resins and thereby inert against the impact of humidity and chemicals. The material is resistant against mold and mildew and does not deteriorate or rot.
Migration – Envoy 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 – Envoy 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 – Envoy 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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Features
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Benefits
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| Physically cross-linked polyolefin foams |
• Good long-term static creep performance
• Do not crumble or produce dust
• Chemically inert, non rotting
• Easy to cut
• Lightweight rolls, easy to carry |
| Closed-cell structure |
• 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 |
