Chapter 4 of 4
Cork & Rubber Underlayments
Cork and rubber underlayments for applications demanding natural materials, specialist acoustic performance, or underfloor heating compatibility. Three products across two material families, covering a range of installation requirements.
- EN 16354
- EN ISO 717-2
- REACH
- RoHS
Products in this chapter
Material Overview — Cork
Cork underlayments are produced from granulated natural cork bonded into a uniform sheet. Cork is a naturally renewable material with excellent compressive strength, thermal insulation, and acoustic damping properties. The cell structure of cork provides inherent resilience, allowing it to recover after compression and maintain its cushioning properties over extended service life.
Cork underlayments are particularly suited for floating floor installations in residential settings where natural materials, thermal comfort, and acoustic performance are priorities. The CORK 20-P product is rated compatible with underfloor heating (UFH) systems, with a low combined thermal resistance that allows efficient heat transfer to the floor surface.
- Naturally renewable material
- Excellent compressive strength
- Natural acoustic damping
- Thermal comfort
- UFH compatible variant available
2 mm Cork Underlayment with Aluminium Foil
2 mm natural cork sheet with aluminium foil backing moisture barrier. Premium natural material for acoustic and cushioning performance in floating floor installations.
- Laminate
- Engineered Hardwood
- Bamboo
| Specifications — CORK 20-AF | |
|---|---|
| SKU / Product Code | CORK 20-AF |
| Material | Natural Cork / Aluminium Foil |
| Thickness | 2 mm |
| Density | 250 kg/m³ |
| Roll Sizes (Coverage per Roll) | 9.3 m² / 18.6 m² |
| Surface Coating | Aluminium Foil |
| Compatible Subfloors | Concrete, Wood, Screeds |
| Underfloor Heating Compatible | No |
| Thermal Conductivity (λ) | 0.05 W/m·K |
| Thermal Resistance (R-value) | 0.04 m²·K/W |
| IIC Rating ★ | 50 dB |
| STC Rating ★ | 46 dB |
| EU Acoustic Testing (ΔLw) | Testing in progress — EN ISO 717-2 |
| Applicable Flooring Types | Laminate, Engineered Hardwood, Bamboo |
| EU Standards Reference | EN 16354, EN ISO 717-2 |
| Packaging Options | Nude (unpackaged roll), Pallet, Carton |
| Container Loading — 20GP | 12,000 m² |
| Container Loading — 40HC | 27,000 m² |
| Country of Origin | China |
| ★ IIC and STC ratings are measured to North American standards (ASTM E492 / ASTM E90). EU-equivalent impact sound improvement (ΔLw, dB) per EN ISO 717-2 testing is in progress for the European market. | |
Packaging options
- Nude (unpackaged roll)
- Pallet
- Carton
2 mm Cork Underlayment with PET Film (UFH Compatible)
2 mm natural cork sheet with PET film surface. Low total thermal resistance (R ≤ 0.15 m²·K/W including floor) for use over underfloor heating systems.
- Laminate
- Engineered Hardwood
- Bamboo
- UFH Compatible
Underfloor heating advisory: CORK 20-P is rated compatible with underfloor heating systems. Always verify that the combined thermal resistance of the underlayment and flooring does not exceed the UFH system manufacturer's maximum recommended values. For warm-water systems, comply with the requirements of EN 1264.
| Specifications — CORK 20-P | |
|---|---|
| SKU / Product Code | CORK 20-P |
| Material | Natural Cork / PET Film |
| Thickness | 2 mm |
| Density | 250 kg/m³ |
| Roll Sizes (Coverage per Roll) | 9.3 m² / 18.6 m² |
| Surface Coating | PET Film |
| Compatible Subfloors | Concrete, Wood, Screeds, UFH systems |
| Underfloor Heating Compatible | Yes |
| Thermal Conductivity (λ) | 0.05 W/m·K |
| Thermal Resistance (R-value) | 0.04 m²·K/W |
| IIC Rating ★ | 50 dB |
| STC Rating ★ | 46 dB |
| EU Acoustic Testing (ΔLw) | Testing in progress — EN ISO 717-2 |
| Applicable Flooring Types | Laminate, Engineered Hardwood, Bamboo |
| EU Standards Reference | EN 16354, EN ISO 717-2 |
| Packaging Options | Nude (unpackaged roll), Pallet, Carton |
| Container Loading — 20GP | 12,000 m² |
| Container Loading — 40HC | 27,000 m² |
| Country of Origin | China |
| ★ IIC and STC ratings are measured to North American standards (ASTM E492 / ASTM E90). EU-equivalent impact sound improvement (ΔLw, dB) per EN ISO 717-2 testing is in progress for the European market. | |
Packaging options
- Nude (unpackaged roll)
- Pallet
- Carton
Material Overview — Rubber
Rubber underlayments are produced from recycled and virgin rubber compounds, delivering exceptional durability and high-density sound damping for demanding applications. The high density of rubber (up to 880 kg/m³) provides structural stability and excellent impact sound isolation. Rubber underlayments are particularly suited to heavy use areas, commercial installations, and applications where long-term compression resistance is critical.
- 880 kg/m³ density
- High structural stability
- Impact sound isolation
- Long-term compression resistance
- No VOC
2 mm Rubber Underlayment
2 mm high-density rubber underlayment. Superior structural stability and impact sound isolation for demanding residential and commercial floating floor applications. No film coating.
- Laminate
- Engineered Hardwood
- Bamboo
| Specifications — RUB 20-A | |
|---|---|
| SKU / Product Code | RUB 20-A |
| Material | Rubber |
| Thickness | 2 mm |
| Density | 880 kg/m³ |
| Roll Sizes (Coverage per Roll) | 9.3 m² / 18.6 m² |
| Surface Coating | None |
| Compatible Subfloors | Concrete, Wood, Screeds |
| Thermal Conductivity (λ) | 0.20 W/m·K |
| Thermal Resistance (R-value) | 0.01 m²·K/W |
| IIC Rating ★ | 64 dB |
| STC Rating ★ | 62 dB |
| EU Acoustic Testing (ΔLw) | Testing in progress — EN ISO 717-2 |
| Applicable Flooring Types | Laminate, Engineered Hardwood, Bamboo |
| EU Standards Reference | EN 16354, EN ISO 717-2 |
| Packaging Options | Nude (unpackaged roll), Pallet, Carton |
| Container Loading — 20GP | 12,000 m² |
| Container Loading — 40HC | N/A |
| Country of Origin | China |
| ★ IIC and STC ratings are measured to North American standards (ASTM E492 / ASTM E90). EU-equivalent impact sound improvement (ΔLw, dB) per EN ISO 717-2 testing is in progress for the European market. | |
Key features:
- Very high-density rubber for superior structural support
- Excellent long-term compression resistance
- Strong impact sound isolation performance
- No VOC
- Container loading: contact OPUS for 40HC capacity on rubber products
Packaging options
- Nude (unpackaged roll)
- Pallet
- Carton