NBS Source
Supafil® Frame Blowing Wool

Supafil® Frame Blowing Wool

Knauf Insulation Ltd Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Supafil® Frame is a Glass Mineral Blowing Wool, designed for use in either on-site or offsite timber frame construction.

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Supafil® Frame is a Glass Mineral Blowing Wool, designed for use in either on-site or offsite timber frame construction.

Supafil® Frame is used in both new and existing structures as a Blow-In-Blanket System for closed cavity applications in which ventilation is not required. Blow-in-Blanket® System (BIBS) is a patented process consisting of unbonded glass mineral wool blown in behind Supafil® Veil which is a special netting material used in framed applications.


Supafil® Frame is a Glass Mineral Blowing Wool, designed for use in either on-site or offsite timber frame construction, that offers excellent thermal performance. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.

Supafil® Veil is a translucent netting which is stapled to the timber frame to create a cavity into which Supafil® Frame insulation is blown.

Features and benefits:

  • Good thermal performance.
  • Non-combustible A1 Euroclass Reaction to Fire classification.
  • Awarded the DECLARE 'Red List Free' label. Allows product transparency disclosure that identifies where a product comes from, what it's made of, and where it goes at the end of its life.
  • Multi-purpose product which can insulate a variety of timber frame applications, maximising efficiency.
  • Provides intimate contact between frames, offering a full-fill solution for a wide range of stud depths, centres and void shapes.
  • Can be installed either on-site or off-site, using our innovative Supafil Frame System.
  • Only one product needed which can insulate all timber frame stud applications.
  • A+ generic BRE Green Guide rating.


  • Eurofins Gold.
  • Euroclass A1 Reaction to Fire Classification.
  • Green Guide Rating A+.
  • CE Marking.
  • Red List Free.
  • Declare.
  • UKCA.
  • EN 15804.
  • EUCEB.
  • Made in Britain.


Supafil® Frame is manufactured in accordance with BS EN 14064, BS EN ISO 50001 Energy Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, as certified by TÜV Nord. All our Glass Mineral Wool products have been awarded the DECLARE ‘Red List Free’ label. Having the ‘Red List Free’ label means that there are no ingredients in the product that are on the red list - including formaldehyde or phenol.

Gaps, voids and penetrations:

Supafil® Frame fills all gaps and voids around service penetrations such as water pipes and any other obstructions or unusual design details, ensuring thermal and acoustic performance is maintained. Supafil® Frame allows quicker and more efficient filling of wide cavities where multiple layers of conventional slabs would normally be installed. Supafil® Frame saves installation time by minimising the steps needed to fully insulate hard to reach areas.


Supafil® Frame contains no ozone-depleting substances or greenhouse gases. For further environmental information consult the relevant Environmental Product Declaration, available on our website.


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

Handling and storage:

Supafil® Frame is supplied in polythene packs (4-LDPE) which are designed for short term protection only. For longer term protection on site, the product should be stored either indoors, or under cover and off the ground. Supafil® Frame should not be left permanently exposed to the elements. 

General information







Mineral wool

Mineral blowing wool.


250 x 1200 x 550 mm


Pr_25_57_06_53 Mineral wool insulationPrimary
Pr_25_31_48_34 Granular mineral wool insulation
Pr_25_57_06/310 Insulation products generally


J31/23 Mineral wool insulation

B11/240 Thermal insulation

B13/241 Thermal insulation

H11/780 Thermal insulation

J21/425 Mineral wool insulation

H90/400 Thermal insulation

H92/776 Thermal insulation

H92/775 Thermal insulation

H30/311 Mineral wool thermal insulation

H30/310 Mineral wool thermal insulation

H31/271 Mineral wool thermal insulation

H31/270 Mineral wool thermal insulation

J31/334 Mineral wool insulation

H30/40 Thermal insulation

H31/50 Mineral wool thermal insulation

J31/26 Thermal insulation

J41/26 Thermal insulation

J42/27 Thermal insulation

P10/220 Sound insulation within timber framed separating wall

K10/85 mineral wool insulation

Specification data - Mineral wool insulation Enhanced data

General requirements

Insulation products generally.


  • BS EN 14064.
  • ISO 50001 Energy Management Systems.
  • OHSAS 18001 Occupational Health and Safety Management Systems.
  • ISO 14001 Environmental Management Systems .
  • ISO 9001Quality Management Systems, as certified by Bureau Veritas.


Blowing wool with Supafil Veil netting material.


29-31 kg/m³.



Thermal conductivity (maximum)

0.033, 0.034; 0.038 W/mK.

Dependent on the density required for the application.

Fire performance

A1 Euroclass Fire Rating.

Recycled content


Water vapour resistance

5.00 MNs/g.m.

Environmental information

Contains Red List materials


Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Embodied carbon

See Product EPD.


Recycled content

80 %

Digital objects

Platform Compatible Version Certified to




Download now from NBS National BIM Library


Knauf Insulation Supafil® Frame Data Sheet

Knauf Insulation Supafil® Frame Data Sheet

Knauf Insulation Solutions Guide

Knauf Insulation Solutions Guide

Glass Mineral Wool - BREEAM Helpsheet

Glass Mineral Wool - BREEAM Helpsheet

Blowing Wool - Safety Data Sheet

Blowing Wool - Safety Data Sheet

Third party certifications

  • Eurofins Gold Certificate for Indoor Air Comfort

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