NatuRoll Plus 040

Knauf Insulation NatuRoll Plus 0.040 – mineral wool for pitched roofs and walls

Keep your budget under control without compromising on performance – Knauf Insulation NatuRoll Plus 0.040 is mineral wool manufactured using ECOSE® technology with a thermal conductivity coefficient of λD = 0.040 W/mK, offering excellent value for money whilst maintaining full water repellency throughout the entire thickness of the material.

It is suitable for a wide range of applications – from pitched roofs and ventilated façades to beam ceilings and timber-framed walls. This product is designed for developers and contractors who require tried-and-tested, certified insulation that is ready for use in all conditions.

What is NatuRoll Plus 0.040 and what makes it stand out?

NatuRoll Plus 0.040 is a mineral wool mat manufactured using ECOSE® technology – a process based on natural, rapidly renewable raw materials, free from formaldehyde, phenols, acrylics and artificial colourants. ECOSE® technology is 70% less energy-intensive than traditional methods of mineral wool production, making this product one of the most environmentally friendly choices available on the building insulation market.

Like NatuRoll PRO, this product is water-repellent throughout its entire volume – the protection against moisture is effective in every millimetre of the material’s thickness, not just on its surface. Water absorption during short-term immersion is less than 1 kg/m², and during long-term partial immersion, less than 3 kg/m².

At the same time, the material remains fully vapour-permeable, allowing water vapour to flow freely through the partition – which is particularly important in pitched roofs and walls with ventilated cladding.

Where is NatuRoll Plus 0.040 best suited?

NatuRoll Plus 0.040 is one of the most versatile products in the Knauf Insulation range – it is ideal for virtually any application where effective thermal and acoustic insulation is required:

• pitched roofs – insulation between the rafters and in the under-rafter space; the product’s primary application,
• beam ceilings – thermal and acoustic insulation of timber ceilings between storeys,
• ventilated façades – as an insulating layer in façades with a ventilation gap,
• coffered and frame walls – filling the space between the structural elements,
• partition walls – improving sound insulation between rooms.

NatuRoll Plus 0.040 – its much-appreciated benefits

NatuRoll Plus 0.040 combines tried-and-tested technology with practical benefits that genuinely enhance the speed and convenience of work on site:

• Water-repellency throughout the entire cross-section of the material – effective protection against moisture penetration across the entire thickness of the wool, not just on its surface.
• High vapour permeability – allows water vapour to escape freely, reducing the risk of condensation and dampness in the partition.
• Effective thermal and acoustic insulation – helps maintain a comfortable indoor temperature and effectively reduces noise transmission.
• The highest fire resistance class, A1 – ensures a very high level of fire safety for the structure.
• Enhanced dimensional stability – the material retains its shape and remains securely in place between the rafters without the need for additional support.
• Quick return to nominal thickness – once unpacked, the wool expands efficiently, streamlining and speeding up installation work.
• A practical roll format – carefully chosen dimensions make transport, handling and installation on site easier.
• Installation without the need for lacing – this helps to reduce installation time and minimise the workload for contractors.

Technical specifications for NatuRoll Plus 0.040

NatuRoll Plus 0.040 has a thermal conductivity coefficient of λD = 0.040 W/mK. Its reaction to fire class is A1, its thickness tolerance class is T2, and its tensile strength exceeds twice the material’s own weight. The diffusion resistance coefficient is 1, which ensures the free exchange of water vapour without the risk of condensation.

The product is available in an exceptionally wide range of thicknesses – from 50 mm up to 240 mm, with a constant width of 1200 mm. The thermal resistance (R) varies depending on thickness, ranging from 1.25 to 6.00 m²K/W, which enables compliance with even the most stringent design requirements and energy standards for nearly zero-energy buildings (nZEB).

Environmental protection and certifications

NatuRoll Plus 0.040 has an Environmental Product Declaration (EPD), which transparently documents the product’s environmental impact at every stage of its life cycle – from the sourcing of raw materials, through production and transport, to use and recycling. The DECLARE certificate confirms that the product contains no formaldehyde, flame retardants or fungicides. The product holds a CE mark (1020 – CPR – 020036600) and a certificate from the National Institute of Hygiene, guaranteeing health and safety for building occupants.

Why choose NatuRoll Plus 0.040?

Knauf Insulation NatuRoll Plus 0.040 is the ideal choice for developers seeking versatile, reliable and environmentally responsible insulation at an attractive price. Available in thicknesses of up to 240 mm, it delivers the very high thermal resistance required in modern construction, whilst full water-repellency throughout the material ensures that its performance remains consistent throughout its service life – regardless of weather conditions. It is an investment in comfort, quiet and energy efficiency that pays for itself over decades of the building’s use.

FAQ – Frequently asked questions about Knauf Insulation NatuRoll Plus 0.040 wool