NatuRoll PRO 039

Knauf Insulation NatuRoll PRO 0.039 – mineral wool for pitched roofs and walls

Are you looking for mineral wool that is suitable not only for pitched roofs, but also for ventilated façades, timber-framed walls and ceilings? Knauf Insulation NatuRoll PRO is a mineral wool mat manufactured using ECOSE® technology, with a thermal conductivity coefficient of λD = 0.039 W/mK and a versatile range of applications, distinguished by its full water-repellency throughout the entire thickness of the material. This means it protects against moisture throughout every millimetre of its cross-section – not just on the surface – whilst maintaining high vapour permeability and excellent thermal insulation properties throughout the building’s service life.

What is NatuRoll PRO and what makes it stand out?

NatuRoll PRO is mineral wool manufactured using ECOSE® technology – a fibre-bonding process based exclusively on natural, rapidly renewable raw materials, free from formaldehyde, phenols, acrylics and artificial colourants.

The product holds a DECLARE certificate, confirming the composition of the material, and an Environmental Product Declaration (EPD), documenting its environmental impact at every stage of its life cycle. ECOSE® technology is, moreover, 70% less energy-intensive than traditional methods of mineral wool production.

A key feature that sets NatuRoll PRO apart from standard mats is that the entire volume of the material is water-repellent – not just the outer coating, but every single wool fibre has been treated to prevent water absorption. As a result, water absorption during short-term immersion is less than 1 kg/m², and during long-term partial immersion, less than 3 kg/m². This is particularly important in areas where the insulation may be exposed to moisture – such as pitched roofs, ventilated façades or external wall structures.

Where is the NatuRoll PRO best suited?

NatuRoll PRO is a product with a wide range of uses:

• pitched roofs – insulation between the rafters and in the under-rafter space; the basic and most common application,
• ventilated façades – as an insulating layer in façades with a ventilation gap,
• coffered and frame walls – filling the space between structural elements,
• floors and ceilings between joists – effective thermal and acoustic insulation in timber ceilings,
• partition walls – improving the acoustics of indoor spaces.

NatuRoll PRO – benefits that contractors appreciate

NatuRoll PRO is a material designed with ease of use and reliability in mind:

• Full-depth water-repellent treatment – protection against moisture throughout the entire thickness, not just on the surface,
• Free flow of water vapour – high vapour permeability eliminates the risk of moisture build-up in the partition,
• Good thermal and acoustic insulation properties – a single product provides protection against heat loss and noise,
• The highest fire resistance class (A1) – maximum fire safety without compromise,
• Enhanced rigidity and dimensional stability – the wool holds firmly in place between the rafters without the need for additional fixings,
• Easier to unroll after unpacking – the material quickly regains its full thickness, which speeds up installation,
• Convenient roll dimensions – a well-designed format that makes them easy to transport and handle on site,
• Easy installation with no lacing required – saving time and reducing the workload for the installation team.

Technical specifications of NatuRoll PRO

NatuRoll PRO achieves a thermal conductivity coefficient of λD = 0.039 W/mK – a parameter worth checking whenever you buy mineral wool, as it directly affects the required insulation thickness and the final energy efficiency.

Its fire reaction class is A1, and its thickness tolerance class is T2. The tensile strength exceeds twice the material’s own weight, and the diffusion resistance factor is 1, which ensures the free exchange of water vapour without the risk of condensation within the partition.

The product is available in a wide range of thicknesses from 50 mm to 200 mm, with a constant width of 1,200 mm. The thermal resistance (R-value) ranges from 1.25 to 5.10 m²K/W, depending on the thickness, allowing you to select the appropriate insulation layer to meet design requirements and current energy standards.

Undoubtedly, one of the additional advantages of NatuRoll PRO 039 mineral wool is its high fire resistance, which significantly enhances the safety of buildings. This material also has sound-absorbing properties, which means it can be successfully used for acoustic insulation in a wide variety of rooms.

Environmental protection and certifications

NatuRoll PRO has an Environmental Product Declaration (EPD), which transparently documents the material’s environmental impact – from the sourcing of raw materials to recycling. The DECLARE certificate confirms that the product contains no formaldehyde, flame retardants or fungicides. The product holds a CE certificate of conformity (1020 – CPR – 020036600) and a certificate from the National Institute of Hygiene, guaranteeing health safety for residents.

Why choose NatuRoll PRO?

Knauf Insulation NatuRoll PRO is a mineral wool product that combines what builders expect from an insulation material – versatility of application, ease of installation and complete water repellency – with what developers expect: durability, excellent thermal performance and environmental safety, as confirmed by certificates. It is a single product that performs well in roofs, walls and ceilings alike, whilst retaining its properties throughout the building’s entire service life.

FAQ – Frequently asked questions about Knauf Insulation NatuRoll PRO 0.039 wool