Knauf Earthwool 150mm Loft Roll 44 Combi-Cut (9.18m2 roll) Loft Insulation
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Knauf 150mm Loft Roll 44 Combi-Cut (9.18m2 roll)

SKU: knea150

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  • Knauf 150mm Loft Insulation is a flexible and lightweight glass mineral wool product, ideal for insulating pitched roofs and suspended timber floors.
  • While not completely soundproof, it effectively blocks most frequencies except very low ones and offers excellent fire resistance.
  • The insulation comes in semi-perforated rolls 1140mm wide, which can be divided into 2 rolls of 570mm or 3 rolls of 380mm.

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150mm Loft Insulation from Knauf provides excellent thermal insulation when insulating the ceiling of your loft. Although this product is mainly intended for pitched roofs, its flexibility, lightness, and ease of use make it an ideal product to insulate suspended timber floors as well. 

Loft Roll insulation is a quilt insulation made of glass mineral wool, like all mineral wool products its density is quite low and while not totally soundproofing, only really low frequencies will leak through the insulation. It also boasts very good fire retardancy. 

Knauf 150mm comes in semi-perforated rolls 1140mm wide. This enables you to divide it into 2 rolls 570mm wide or 3 rolls 380mm wide. The installation process is simple enough, a first layer is placed between the joists, then a second layer should be added on top of it at a 90° angle to the joists. 

This insulation does not give out odors and will never rot. Nor does it favour the growth of fungi, mould or bacteria. It is also unsuitable for vermin.  

We recommend you to click the Datasheets tab in order to consult the data sheet, should you require more in-depth information about Loft Roll 44.



  • Thermal conductivity: 0.044 W/mK
  • Thermal resistance: 3.40 m²K/W
  • Fire-resistant: Yes
  • Vapour-resistant: Yes
  • Coverage: 9.18m²



Loft Roll 44 is delivered in packs that only provide temporary protection. It should be kept indoors and off the ground as stipulated in the instructions displayed on every pack.



All environmental standards have been adhered to during the manufacturing of this product. It is free from CFCs,  HCFCs and is classified as Zero ODP &  Zero GWP.

  • Knauf Earhtwool Roll is manufactured in compliance with BS EN 13162:2008, EN 16001:2009 Energy Management Systems
  • OHSAS 18001:2007 Occupational Health and Safety Management Systems
  • ISO 9001:2001 Quality Management Systems as certified by Bureau Veritas
  • Euroclass A1 to BS EN ISO 13501-1


Frequently Asked Questions

Can I use Knauf Loft Roll 44 for both ceilings and floors? Yes, Knauf Loft Roll 44 is primarily designed for insulating pitched roofs, but its flexibility, lightness, and ease of use also make it an ideal product for insulating suspended timber floors.

How do I install Knauf Loft Roll 44?

The installation process consists of two layers:

  • Place the first layer between the joists.
  • Add a second layer on top of the first one at a 90° angle to the joists.


Is this insulation fire-resistant? Yes, Knauf Loft Roll 44 boasts excellent fire retardancy.

Can Knauf Loft Roll 44 help with soundproofing? While not completely soundproof, Knauf Loft Roll 44 provides some sound insulation. Only really low frequencies will leak through the insulation.

What is the coverage of a single roll? One roll of Knauf Loft Roll 44 covers 9.18m².

Is Knauf Loft Roll 44 environmentally friendly? Yes, Knauf Loft Roll 44 adheres to all environmental standards during its manufacturing process. It is free from CFCs, HCFCs and is classified as Zero ODP & Zero GWP.

What certifications does Knauf Loft Roll 44 have?

Knauf Loft Roll 44 is manufactured in compliance with:

  • BS EN 13162:2008
  • EN 16001:2009 Energy Management Systems
  • OHSAS 18001:2007 Occupational Health and Safety Management Systems
  • ISO 9001:2001 Quality Management Systems as certified by Bureau Veritas
  • Euroclass A1 to BS EN ISO 13501-1


Other Knauf Loft Roll Products

Knauf offers a wide range of insulation products to cater to different insulation needs. Here are some other popular Knauf Loft Roll products:

Knauf Acoustic Roll: Designed for enhanced sound insulation in walls, floors, and partitions.

Knauf Omnifit: A versatile insulation solution for multiple applications.

Knauf Dritherm Cavity Slab 34 Super: - Specifically designed for use in masonry cavity walls.

Knauf Combi Cut: A flexible glass mineral wool quilt, ideal for multiple thermal and acoustic applications.

Knauf Omnifit Roll: A high-performance insulation roll suitable for a range of applications, including walls and roofs.

Knauf Omnifit Stud: An insulation product designed for use in timber or metal stud partitions, floors, and roofs.

Knauf Dritherm 37: A cavity wall insulation product providing excellent thermal performance.

Knauf Frametherm Roll: A lightweight, flexible insulation solution designed for use in timber-framed buildings.

90mm Frametherm Roll 40: A thinner variant of the Frametherm Roll, providing excellent insulation in timber-framed constructions.

Knauf 200mm Combi Cut: A thicker option of the Combi Cut insulation, designed for multiple thermal and acoustic applications.


Customer Feedback

The Knauf 150mm Loft Roll 44 Combi-Cut has received positive feedback from customers who have used it for their insulation projects. Many have noted that the product provides excellent insulation, while being easy to install and handle. Customers appreciate the fact that the insulation is non-itchy and can be cut and laid without difficulty, making the installation process a breeze.

The Loft Roll 44's effectiveness in insulating both ceilings and floors has been praised by many customers, who have used it to improve the thermal performance of their homes. Customers have also found the product's fire-resistant and vapor-resistant properties to be beneficial, along with its resistance to fungi, mold, bacteria, and vermin.

Some customers have mentioned that the product can be slightly difficult to cut into sections, but once mastered, the installation goes smoothly. However, the majority of customers have found the Loft Roll 44 to be effective at insulating their homes, providing noticeable improvements in temperature and comfort.

Overall, customers have found the Knauf 150mm Loft Roll 44 Combi-Cut to be a versatile, easy-to-install, and effective solution for insulating their homes. They would recommend it to others who are looking for a high-quality insulation product.


Length 8050mm
Width 1140mm
Coverage 9.18m2
Thermal Conductivity 0.044 W/mK
Thickness 150mm
Weight kg 12.94
Brand Knauf Earthwool
Material Type Glasswool

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