The Future of Modern Insulation

From Upcycling to a Fully Circular Insulation Material

CycleWool represents a new generation of fully circular insulation materials. Through technical upcycling, industrial fiber residues are transformed into a high-quality insulation product with outstanding performance and a service life of more than 50 years.
Thanks to short transport routes – for both raw materials and distribution – CycleWool actively contributes to climate protection. The energy required for processing and packaging is generated entirely from wind and solar power, making the product CO₂-neutral after only a few days.

Advantages of CycleWool

By choosing CycleWool, you opt for insulation that combines resource efficiency, high performance, and easy application. The material not only ensures a comfortable indoor climate and effective fire protection, but also impresses with its durability and the use of industrial surplus materials. In this way, you benefit from an insulation material that turns waste into new value while remaining economically efficient.

Completely Recyclable

CycleWool is produced from high-quality industrial surplus materials and can be fully reused or recycled at the end of its service life. This creates a closed material cycle that conserves natural resources and actively supports sustainable building practices.

Flexible Application

The material adapts precisely and seamlessly to any building shape through the blown-in process. No cutting waste is produced, ensuring efficient and clean installation — both in new constructions and renovations.

Sound Insulation

The open-fiber structure of CycleWool reliably absorbs sound waves and effectively reduces noise transmission between rooms and from outside sources. The result is a noticeably improved acoustic environment and greater living or working comfort.

Fire resistant

CycleWool meets the highest fire safety standards, contributing significantly to building protection. It is non-combustible, produces virtually no smoke, and prevents rapid fire spread — a crucial advantage in sensitive construction areas.

Harmless to health

CycleWool contains no formaldehyde or phenols and meets the strict standards of Eurofins^®, Blauer Engel^®, and DECLARE™. The material is skin-friendly, low-emission, and promotes a healthy, pleasant indoor environment thanks to its natural composition.

Sustainably Climate-Friendly

CycleWool is produced under climate-neutral conditions and binds more CO₂ than is emitted during manufacturing. Each application therefore improves the overall carbon footprint of a building and actively supports climate protection.

Summer Heat Protection

Even in warm summer months, CycleWool ensures pleasantly cool indoor temperatures. Its high heat storage capacity delays heat transfer, keeping rooms consistently comfortable — a clear advantage for both living comfort and energy efficiency.

Winter Cold Protection

CycleWool retains heat efficiently in winter, reducing heating costs and energy consumption. The seamless insulation layer maintains constant indoor temperatures and prevents drafts — an effective defense against heat loss and a major contribution to sustainable living.

Eurofins^® is a registered trademark of Eurofins Scientific SE. Blauer Engel^® is an environmental label registered by the German Federal Environment Agency. DECLARE™ is a trademark of the International Living Future Institute (ILFI).

Areas of application for CycleWool

CycleWool is a versatile insulation material that adapts flexibly to modern construction methods. Whether in new buildings or renovation projects, it impresses with its simple installation and its ability to fill even hard-to-reach cavities seamlessly. This results in homogeneous, gap-free insulation layers that provide maximum energy efficiency and noticeably improved living comfort.

CycleWool - Anwendungsbereiche - Dachböden

Sloping ceilings and attics

CycleWool is ideal for insulating pitched roofs, as it is blown seamlessly into the cavities. In unused attics, the material can also be applied openly to the surface to achieve a uniform insulating effect. This not only ensures better energy efficiency, but also a much more pleasant indoor climate under the roof.

CycleWool - Anwendungsbereiche Außenwaende und Holzrahmenbau

Timber-Frame Walls

In timber-frame construction, every cavity must be reliably filled – this is where CycleWool shows its strength. The flexible material adapts perfectly, leaving no thermal bridges or voids. The result is a sustainable improvement in energy efficiency and additional acoustic comfort.

CycleWool - Anwendungsbereiche - Innenwände und Trennwände

Interior walls and partitions

For interior walls and partition walls, CycleWool offers not only thermal insulation but also excellent sound insulation. The flexible installation achieves uniform insulation, which reduces temperature fluctuations and ensures quiet rooms. This makes it ideal for increasing both living comfort and privacy.

CycleWool - Anwendungsbereiche -Zwischendecken

False ceilings

CycleWool effectively prevents heat loss between floors in suspended ceilings. At the same time, sound transmission is significantly reduced, which makes for a quieter and more pleasant living environment. Blow-in insulation can be implemented quickly and efficiently without having to carry out extensive construction work.

CycleWool - Anwendungsbereiche - Sanierung im Bestand

Renovation of Existing Buildings

Especially in existing buildings, CycleWool demonstrates its advantages. It can be installed easily and without damaging existing structures, allowing older houses to meet modern energy standards. Fast application saves time and costs – while residents immediately benefit from increased comfort and a healthier indoor climate.

Environmental Performance & Technical Values

CycleWool impresses with excellent technical characteristics and the sustainable use of resources:

Thermal conductivity (λD): 0,035 – 0,037 W/mK (depending on density range) – ensuring high energy efficiency and outstanding insulation performance.
Fire protection: Building material class A1 – non-combustible, no tendency to smolder.
Material base: Produced from recycled mineral wool – resource-efficient and durable.
Service life: Tested for over 50 years of consistent performance.

Technical Specifications and Performance Data (ETA-24/0838)

Property	Value
Thermal conductivity (λ_D)	0.037 W/mK (at 30–35 kg/m³) · 0.035 W/mK (at 40–45 kg/m³)
Installed bulk density	30–35 kg/m³ (loose fill) · 40–45 kg/m³ (cavities/between rafters)
Laboratory bulk density, free placement	33.8 kg/m³
Laboratory bulk density, in cavities	46.2 kg/m³
Reaction to fire	Euroclass A1 (non-combustible); organic content ≤ 2.9% (m/m); passed smoldering test
Water vapor diffusion resistance	μ = 1 · moisture conversion factor F_m = 1.00 (23/50→23/80)
Settlement behavior	Ceilings: ≤ 9.5% (≥ 35 kg/m³, up to 321 mm) · Walls/Rafters: SC 0 (≤ 1%) (≥ 41 kg/m³, up to 100 mm)
Airflow resistance	≥ 5.2 kPa·s/m² (at ≥ 30 kg/m³) · ≥ 11.3 kPa·s/m² (at ≥ 40 kg/m³)

Technical specifications according to ETA-24/0551 (Durafloc Eco) and ETA-24/0838 (CycleWool RW / CycleWool TF), as well as the corresponding Declarations of Performance (DoP) provided by the manufacturers. The values refer to tested laboratory conditions and may vary slightly in practical application.

Download ETA 24/0838