Expanded Cork Granules
Expanded Cork Granules are a natural insulation material manufactured from recycled expanded cork board. Produced by granulating expanded cork into loose granules of varying sizes, they provide a lightweight, breathable solution for thermal and acoustic insulation within floors, lightweight concrete, and void filling applications.
Manufactured from recycled cork, the granules retain the natural insulating properties of expanded cork while offering a sustainable and versatile insulation material for both new-build and renovation projects.
Technical Data
| Property | Value |
|---|---|
| Product Type | Expanded Cork Granules |
| Material | Recycled Expanded Cork |
| Density | 65–80 kg/m³ |
| Thermal Conductivity (λ) | 0.045–0.050 W/mK |
| Granulometries Available | 0–2mm, 2–4mm, 2–9mm, 3–15mm, 4–8mm, 4–10mm |
| Vapour Behaviour | Vapour Permeable |
| Application | Floors, Lightweight Concrete & Void Filling |
| Certification | ETA 15/0300 |
Key Benefits
Recycled & Sustainable
Manufactured from recycled expanded cork board, helping extend the lifecycle of a natural and renewable material.
Thermal Insulation
Provides thermal insulation within lightweight concrete mixes, floor constructions, and cavity fill applications.
Acoustic Performance
Contributes to improved acoustic performance when incorporated into floor systems and lightweight concrete.
Lightweight
The low density of expanded cork granules helps reduce the overall weight of floor and lightweight concrete constructions.
Vapour Permeable
Suitable for breathable construction systems where moisture movement through the building fabric is required.
Versatile Application
Can be used loose, as a floor void fill, or incorporated into lightweight insulating concrete mixes.
Typical Applications
| Application | Suitability |
| Floor Void Filling | ✓ |
| Lightweight Concrete | ✓ |
| Thermal Floor Upgrades | ✓ |
| Acoustic Floor Improvements | ✓ |
| Breathable Floor Constructions | ✓ |
| Renovation Projects | ✓ |
| New Build Projects | ✓ |
Why Use Expanded Cork Granules?
Expanded Cork Granules provide a lightweight and breathable insulation solution for floor and void fill applications. Their combination of thermal insulation, acoustic benefits, and low density makes them particularly useful where reducing floor weight and improving thermal performance are important considerations.
As a recycled cork product, they also offer a sustainable alternative to many conventional lightweight fill materials.
Installation Overview
1. Preparation
Ensure the substrate or void is clean and suitable for installation.
2. Placement
Install the granules directly within floor voids or prepare for incorporation into lightweight concrete mixes.
3. Lightweight Concrete
Where specified, mix with cement and aggregates in accordance with the project requirements.
4. Levelling
Level and compact as required for the intended application.
5. Floor Finish
Complete the build-up with the specified screed, flooring, or finish.
