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Knauf  |  SKU: 2404155

Knauf Loft Roll 44 Insulation - 150mm Combi-Cut (9.18m²) (1 Roll/Pack)


£29.91 Ex VAT
£35.89 Inc VAT
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Use Knauf Loft Roll 44 as an effective thermal insulation in cold pitched roofs. Installed at ceiling level, this glass mineral wool insulation is a non-combustible loft insulation that reduces heat loss from the loft, by layering between and over the top of ceiling joists within the loft area. 

Loft roll 44 “Combi Cut” insulation is pre-perforated to allow them to be separated into widths of either 2 x 570mm or 3 x 380mm.

  • 150mm thickness
  • Install over roof joists in combination with rolls installed between joists
  • Pre-cut to be separated in 2 x rolls at 570mm or 3 x rolls at 380mm
  • Euroclass A1 resistance to fire
  • Pack of 1 Roll

Knauf Loft Roll Certifications

  • Complies to BS EN 13162
  • EUCEB Certified
  • manufactured in accordance with ISO 50001 Energy Management Systems, ISO 14001 Environmental Management Systems, ISO 45001 Occupational Health and Safety Management Systems and ISO 9001 Quality Management Systems. 

Data Sheets & Guides:

Knauf Loft Roll Data Sheet

Knauf Loft Roll Installation Guide

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  • Size
    W: 1140mm (2 x 570mm/3 x 380mm) x L: 8050mm x T: 150mm
  • Quantity Per Pack
    1 Roll
  • Coverage (m²)
    9.18
  • Thickness
    150mm
  • Length
    8050mm
  • Width
    1140mm
  • Material
    Glass Mineral Wool
  • Estimated Lifespan
    Equivalent to lifetime of wall structure
  • Thermal Resistance
    3.40 m2K/W
  • Thermal Conductivity
    0.044 W/mK
  • Water Resistance
    5.00 MNs/g.m
  • Reaction to Fire
    Euroclass A1

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What is Loft Insulation?

Loft insulation is a type of thermal insulation typically used in buildings to improve energy efficiency and reduce heat loss. Most modern loft insulation is made from mineral wool, which consists of tightly packed mineral fibers, usually made from materials like rock or glass, which create a barrier against heat transfer. This insulation is commonly installed in the loft or attic spaces of homes, laid between ceiling joists or rafters, to prevent heat from escaping through the roof. Mineral wool loft insulation is known for its excellent thermal performance, fire resistance, and sound absorption properties, making it a popular choice for both residential and commercial construction projects aiming to enhance comfort and energy savings.

What Sizes Does Loft Insulation Roll Come In?

We offer our Loft Insulation Rolls in a range of thicknesses:

100mm, 150mm, 170mm, 200mm.

Designed to fit the depth of your ceiling joists. Loft insulation Roll is unique in that it is perforated at multiple points along the breadth of the roll, to allow you to split them to fit the width of the space as required, or leave as full sheets. 

How to Install Loft Insulation Roll

To install loft roll insulation, first, ensure safety gear like gloves, goggles, and a mask are worn. Measure the distance between the joists in the loft space and cut  or separate the insulation rolls accordingly. Unroll the insulation and fit it snugly between the joists, ensuring there are no gaps or spaces. Use a utility knife to trim any excess insulation if necessary. Take care not to compress the insulation excessively, as this can reduce its effectiveness.

Knauf Loft Insulation Roll

Our Knauf insulation is Knauf's Loft Roll 44, which is one of the most popular types of loft insulation and is sold in a variety of thicknesses from 100mm to 200mm to best suit your project. It is sold in a single roll that is perforated along it's length to allow it to be split into 2 x 570mm width or 3 x 380mm width pieces, depending on the size of your joist cavity. Knauf Loft insulation has a thermal conductivity of 0.044y W/mK and a fire rating of Euroclass A1.

Isover Loft Insulation Roll

Isover is an effective loft insulation roll made from glass mineral wool that is sold in a continuous roll. Similar to Knauf loft insulation roll, it is pre-perforated (3 x 386mm or 2 x 580mm widths) to allow you to adjust it to the spacing between your joists.