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Supafil Party Wall Insulation is an unbonded, non-combustible glass mineral wool insulation which requires no mixing on site. Supafil Party Wall prevents heat loss through party separating cavity walls, and when used in conjunction with effective edge sealing allows a zero effective U-value to be used within SAP calculations for new dwellings. Supafil Party Wall is classified as Zero ODP and Zero GWP.

Related literature

The following content references this product:

Standard product features

Installed density:

18.00 kg/m3.

Fire performance:

Euroclass A1 to BS EN 13501-1.


A+ generic BRE Green Guide rating.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-55-45/330 Mineral wool fibre insulation

Product specification

An important note about specifying



Knauf Insulation Ltd


+44 (0)1744 766 600

Product reference

Supafil® Party Wall

Manufacturer details

PO Box 10,
Stafford Road,
St Helens,
Merseyside, WA10 3NS
Tel +44 (0)1744 766 600
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