Knauf Rafter Roll

Last Updated: October 01, 2015 13:39

Rafter Roll is designed for insulating between the rafters of pitched roofs in new build and existing buildings.

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Product Details

Rafter Roll is designed for insulating between the rafters of pitched roofs in new build and existing buildings. It is easy to cut and friction fit between rafters. Rafter Roll can be used either as a single or double layer between rafters, or as the first layer of a two layer system in combination with Polyfoam Linerboard.

Rafter Roll is non-combustible glass mineral wool, defined as mineral wool in BS 3533: 1981 and is manufactured in accordance with BSI Quality Assurance Standard BS EN ISO 9001: 2000, and Product Standard EN 13162.


Rafter Roll is odourless, rot proof, non-hygroscopic, does not sustain vermin and will not encourage the growth of fungi, mould or bacteria.


Knauf Insulation mineral wool products with ECOSE®Technology benefit from a revolutionary, bio-based, formaldehyde-free binder technology, based on rapidly renewable materials, instead of petro-based chemicals. It reduces embodied energy and delivers superior environmental sustainability.

The technology has been developed for Knauf Insulation’s glass and rock mineral wool products, enhancing their environmental credentials without affecting the thermal, acoustic or fire performance. Insulation products made with ECOSE® Technology contain no dye or artificial colours – the colour is completely natural.

Thermal Performance

Rafter Roll has a thermal conductivity of 0.032 or 0.036 W/mK.

Fire Performance

Rafter Roll is classified as Euroclass A1 to BS EN ISO 13501-1.

Acoustic performance

Rafter Roll has excellent sound absorption characteristics.

Vapour Resistance

Rafter Roll allows water vapour to pass freely through it, therefore allowing the construction element to breathe.

Rafter Roll is unfaced, making it necessary to install a separate vapour control layer.

Handling and Storage

Rafter Roll is easy to handle and install, being lightweight and easily cut to size, where necessary. It is supplied in polythene packs which are designed for short term protection only.

For longer term protection on site, the product should either be stored indoors, or under cover and off the ground.

Installation instructions are on every pack. Rafter Roll should not be left permanently exposed to the elements.


  • Very high thermal performance

  • Combines thermal and acoustic performance

  • Quick and easy installation

  • Friction fitting allows rafter spacing to be completely filled, thus eliminating air gap

  • Longer roll lengths

Rafter Roll is free from CFCs, HCFCs and any other material with ozone depletion potential in its manufacture and content and represents no known threat to the environment.

Rafter Roll’s manufacture has a low impact on the environment and is classified as Zero ODP and Zero GWP.

Specification & Product Codes



Semi-Rigid Roll of Glass Mineral Wool

Environmental statement:
Euroclass A1 to BS EN ISO 13501-1
EPD (to ISO 14025):
EN 13162
3rd party Accreditation:
BS 3533:1981
BS EN ISO 9001:2000
Quality certification:
BSI Quality Assurance Standard
Recycled content (to ISO 14021/WRAP):
ECOSE Technology



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