Home · Products · Wolle

Wolle

Thermal insulation fibre made from recycled PET, without binders, formaldehyde or phenol.

Technical content: Bogdan Ivănescu, graduate engineer, PhD candidate at the Technical University of Cluj-Napoca · updated on 16.10.2026

Where to buy Wolle →

Benefits

The volumetric insulation of the system: it fills the space between rafters, joists or studs. It is completely hydrophobic, sound-absorbing and does not settle, so its thickness and performance remain the same over time.

Where the build-up also includes a 5 cm layer, this is installed first: it adheres very well to the porosity of the substrate and requires no anchoring at all. You then install the 10 cm layer.

Wolle, an Isoflect product

Choose the option

Type
Packaging

Wolle P800, rollP800 · 5 cm · Roll

Roll 0.61 × 10 m

6.1 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, rollP800 · 5 cm · Roll

Roll 0.8 × 10 m

8 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, rollP800 · 5 cm · Roll

Roll 1 × 10 m

10 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, rollP800 · 5 cm · Roll

Roll 1.2 × 10 m

12 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, rollP800 · 5 cm · Roll

Roll 1.5 × 10 m

15 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, rollP800 · 5 cm · Roll

Roll 0.15 × 10 m, for Posi beams

1.5 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, rollP800 · 5 cm · Roll

Roll 0.2 × 10 m, for Posi beams

2 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P800, standard packP800 · 5 cm · Standard pack

Pack of 16 boards, 1200 × 610 × 50 mm

11.712 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P1500, standard packP1500 · 10 cm · Standard pack

Pack of 8 boards, 1200 × 610 × 100 mm

5.856 m² · λ₁₀ = 0.038 W/(m·K)

Photograph of the Jumbo pack to follow
P1500 · 10 cm · Jumbo pack

Jumbo pack

18.95 m² · λ₁₀ = 0.038 W/(m·K)

Wolle P2100, standard packP2100 · 10 cm · Standard pack

Pack of 8 boards, 1200 × 610 × 100 mm

5.856 m² · λ₁₀ = 0.035 W/(m·K)

Photograph of the Jumbo pack to follow
P2100 · 10 cm · Jumbo pack

Jumbo pack

18.95 m² · λ₁₀ = 0.035 W/(m·K)

The dimensions of the boards in the Jumbo packs are available on request.

Posi Joist PS16 beam with the Wolle boards between the flanges
For manufacturers

Wolle for Posi Joist beams

P1500 and P2100 boards, 10 cm thick and 3 m long, cut to the void of each model, from PS8 to PS16. The beam leaves the factory already insulated.

View the boards for Posi Joist →
Where it is used

Applications for Wolle

Select the part of the house you wish to insulate.

3D rendering: the reflective package for habitable attics3D rendering: Wolle P800 between the rafters, beneath the roof boarding3D rendering: Wolle P800 beneath the rafters3D rendering: the timber floor slab in the unheated attic, with walkable boarding3D rendering: the timber floor slab in the unheated attic, without walkable boarding3D rendering: renovation of the attic floor slab3D rendering: the concrete slab in the unheated attic, with walkable boarding3D rendering: the concrete slab in the unheated attic, without walkable boarding3D rendering: internal wall insulation, with OSB3D rendering: internal wall insulation, without OSB3D rendering: brick or concrete, internally3D rendering: partition walls3D rendering: the ventilated façade
GARAN warranty label Wolle
50 years

Commercial durability warranty for interior use, with GARAN certificate.

Calculate the material requirements for your house

Technical data

From the technical data sheet

0.035λ₁₀ W/mK, P2100SR EN 12667λ (W/mK), thermal conductivity: how readily the material conducts heat; the lower the value, the better the material insulates. What it means →
0.038λ₁₀ W/mK, P800 and P1500SR EN 12667
C-s2,d0Reaction to fire, without flaming dropletsEN 13501-1C-s2,d0: the reaction-to-fire class — C limited contribution to fire, s2 moderate smoke, d0 no flaming droplets. What it means →
HydrophobicDoes not absorb moisture
No settlingConstant performance over time
AT 001SB-03/1039-2024Technical approval, INCD URBAN-INCERC, INCERC Bucharest Branch; endorsed by CTPC on 29.01.2025, valid until 29.01.2028CTPC technical opinion valid until 29.01.2027
Recycled PETWithout binders, formaldehyde or phenol
The Isoflect sample pack: samples of the membranes and of Wolle
The sample pack

See and touch the products before ordering

The Isoflect sample pack contains samples of the reflective membranes and of Wolle wool insulation, so that you can compare the materials at home or on site.

Guides

Guides on this product

WOLLE insulation for dry and quiet habitable attics

WOLLE insulation for habitable attics, walls and unheated attics: thermal comfort, sound absorption and moisture control for an efficient and dry house in every season.

Read the guide →

Acoustic protection of a house insulated with WOLLE

How Wolle insulation contributes to the sound attenuation of walls, floor slabs and habitable attics in a dwelling.

Read the guide →

System 10: over 10 m²·K/W with 25 cm of Wolle between the rafters

How System 10 achieves a thermal resistance of over 10 m²·K/W with 25 cm of Wolle between the rafters, by addressing radiation, conduction and convection.

Read the guide →

Characteristics and benefits of Isoflect Wolle thermal insulation

The characteristics of Isoflect Wolle insulation: thermal conductivity, behaviour in the presence of moisture and advantages during installation.

Read the guide →

Ecological wool versus mineral wool for the home

Ecological wool versus mineral wool for habitable attics, walls and unheated attics: thermal performance, moisture, sound insulation, installation and durability.

Read the guide →

Reflective insulation versus stone wool for houses

Reflective insulation versus stone wool: compare thickness, vapour behaviour, acoustic comfort and installation to make the correct choice for your home, without surprises.

Read the guide →

Share this page

Send it to someone who is insulating a house. You can also find us on WhatsApp and on social networks.