The Future of Modern Insulation
Blown-in insulation made from recycled mineral wool
CycleWool is a blown-in insulation material made from recycled mineral wool. It is manufactured from residual streams of the mineral wool industry. The material is intended for thermal insulation in suitable, dry building elements. The European Technical Assessment ETA 24/0551 describes its intended uses and installation conditions.
Advantages of CycleWool
CycleWool consists of recycled mineral wool. Its technical properties and intended uses are described in ETA 24/0551 and Declaration of Performance DC01-240551. Insulation performance depends on thickness, installation density and the complete building element.
Made from recycled materials
Manufactured from residual streams of the mineral wool industry. The EPD describes environmental impacts for defined life cycle modules and disposal scenarios. It does not demonstrate that the material will actually be reused or recycled after every application.
Flexible Application
The material is installed using a blowing machine, either in suitable cavities or in open applications. Installation must follow the manufacturer’s instructions. Building geometry, density and installation openings must be planned beforehand.
Sound Insulation
Acoustic performance depends on the complete building element. ETA 24/0551 does not declare an assessed sound absorption performance for this product. An acoustic assessment is required for the specific construction.
Reaction to fire: A1
ETA 24/0551 and Declaration of Performance DC01-240551 classify CycleWool as A1 (non-combustible), with no propensity for continuous smouldering. The fire resistance of the complete building element must be assessed separately.
Installation instructions
Installation must follow the manufacturer’s instructions. The specified protective measures for handling mineral wool fibres must be observed. No blanket claim about healthy living conditions or freedom from emissions is inferred from the ETA or Declaration of Performance.
Material origin
Summer Heat Protection
Winter Cold Protection
Areas of application for CycleWool
CycleWool is intended for thermal insulation in suitable, dry building elements. It can be blown onto nearly horizontal surfaces or into closed cavities. Installation must follow ETA 24/0551 and the manufacturer’s instructions. Thermal, moisture and acoustic performance must be considered for the complete building element.
Sloping ceilings and attics
CycleWool can be blown into suitable closed cavities in pitched roofs. Open application in attics is intended for nearly horizontal surfaces with a maximum slope of 10°. Installation density, thickness and moisture protection must follow ETA 24/0551 and the manufacturer’s instructions.
Timber-Frame Walls
CycleWool can provide thermal insulation in suitable closed cavities in timber-frame walls. Installation density and workmanship must follow ETA 24/0551 and the manufacturer’s instructions. Thermal bridges, airtightness and moisture protection must be considered for the complete wall.
Interior walls and partitions
CycleWool can be used for thermal insulation in suitable, dry wall cavities. The acoustic performance of an interior wall or partition depends on the complete construction and requires an appropriate assessment.
False ceilings
CycleWool can be blown into suitable, dry ceiling cavities. The insulation must not carry compressive loads. Thermal and acoustic performance must be planned for the complete ceiling construction, following the manufacturer’s installation instructions.
Flat roof renovation
Blown-in insulation in flat roofs requires suitable, dry cavities where the insulation does not carry compressive loads. The roof structure and moisture protection must be assessed before installation. ETA 24/0551 and the manufacturer’s instructions apply.
Renovation of Existing Buildings
Existing building elements and cavities must be checked for suitability before installation. Access, moisture protection and the required installation openings determine the work involved. Potential energy savings depend on the building’s condition, installation and use.
Technical properties
The following properties are described in Declaration of Performance DC01-240551 and European Technical Assessment ETA 24/0551:
- Thermal conductivity (λD): 0.035 W/(m·K) at 30–35 kg/m³ for open applications and 0.034 W/(m·K) at 42–65 kg/m³ in closed cavities. National design rules apply.
- Reaction to fire: Class A1, non-combustible, with no propensity for continuous smouldering.
- Material: recycled mineral wool.
- Application: dry, non-load-bearing insulation in accordance with ETA 24/0551.
Documents and evidence
The IBU Environmental Product Declaration for CycleWool / Durafloc, EPD-DIB-20260195-CBA1-EN, was issued on 15 June 2026 and is valid until 14 June 2031. It describes environmental impacts for 1 m³ of insulation at an average density of 47.5 kg/m³ in modules A1–A5, C1–C4 and D. The use stage B is not declared; results depend on the stated scenarios.
Open the EPD for CycleWool / Durafloc (PDF; opens in a new tab)
Technical values according to ETA 24/0551
| Property | Value |
|---|---|
| Thermal conductivity (λD) | 0.035 W/(m·K) at 30–35 kg/m³ (open application); 0.034 W/(m·K) at 42–65 kg/m³ (closed cavities) |
| Reaction to fire | Class A1 (non-combustible); no propensity for continuous smouldering |
| Water vapour diffusion resistance | μ = 1 |
| Intended use | Dry, non-load-bearing insulation; open application on surfaces with a maximum slope of 10° or suitable closed cavities, following the manufacturer’s instructions |
These values apply to Durafloc Eco / CycleWool according to ETA 24/0551 and Declaration of Performance DC01-240551. National design rules and the manufacturer’s installation and application conditions must be observed.
