Knauf Earthwool Loft Roll 44 Glass Mineral Insulation 100mm / 150mm

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Pricing & Availability:

Due to the nature of this product range we are unfortunately unable to routinely deliver these products to sites that are not within the locality of our branches (which is broadly Surrey, West Sussex and parts of South & West London, Kent & East Sussex). 

For pricing and availability on these products to sites that are outside of our local area please contact us directly so that we can explore the most cost effective options for you.

We also stock and supply a large range of roofing materials, with thousands more being available to order directly from all the leading manufacturers. If you don't see the roofing products that you need on this site please contact us and we will try to source them for you or offer you an alternative.

We are able to offer prices tailored to your exact requirements & project: Please call us on 01737 763008 or email us for a free quotation.


Knauf Earthwool Loft Roll 44 Glass Mineral Insulation 100mm / 150mm

Knauf Earthwool Loft Rolls are non-combustible, Glass Mineral Wool rolls, manufactured using revolutionary ECOSE Technology, and are designed specifically for use in cold lofts where pitched roofs are insulated at ceiling level.

Although primarily used for the thermal insulation of pitched roofs at ceiling level, this product can also be used to thermally insulate floors.

Resilient and water-resistant, these glass mineral wool rolls by Knauf Insulation are easy to handle.

Knauf Insullation is the UK’s leading manufacturer of mineral wool insulation products, with excellent thermal, acoustic and fire performance characteristics.

Knauf Insulation’s Earthwool utilises the groundbreaking binding process of ECOSE Technology: A sustainable binder that has no added formaldehyde, acrylics or artificial colours. ECOSE Technology has been developed for Knauf Insulation’s glass and rock mineral wool products, and has been a significant step change in the mineral wool industry. 

Thermal Performance:

Refurbishment: Where more than 50% of the surface of an individual element, or 25% of the total building envelope, is to be renovated, the thermal performance of the roof, if insulated at ceiling level, should be improved to a U-value of 0.16W/m2K.

New build: The limiting fabric parameter in Approved Document L1A (both 2010 and 2013) is 0.20W/m2K. However, a U-value of 0.11W/m2K to provide compliance for most house types is recommended. For a higher level of performance a U-value of 0.08W/m2K is suggested.

We would suggest that you should optimize performance at any opportunity and loft insulation is most cost effective way of improving thermal performance in terms of ratio of cost to energy saved.



  • Length: 100mm Roll = 7280 mm / 150mm Roll = 4969mm
  • Thickness: 100mm / 150mm
  • Width: 1140mm
  • Coverage: 100mm Roll = 8.30 m2 / 150mm Roll = 5.59 m2
  • Material: Glass Mineral Wool
  • Fire Retardant: Yes
  • Thermal Conductivity: 0.044 W/mK


  • CFC & HFC free
  • Fire & Moisture resistant
  • Zero ozone depletion potential
  • Low GWP
  • Non-combustible
  • Euroclass A1 reaction to fire rating


  • Longer roll lengths than competitors' alternatives
  • Product is lightweight and partially perforated for quick installation
  • Designed for use between either 400mm or 600mm joists
  • Available in a range of thicknesses with a thermal conductivity of 0.044 W/mK
  • Excellent thermal performance
  • Non-combustible A1 Euroclass Reaction to Fire classification
  • More insulation per roll than alternative loft rolls
  • Soft to handle
  • Quick to recover
  • Easy to cut