Blowing Wool - Supafil Party Wall


Party separating walls


Blowing Wool


Supafil® Party Wall is a high performance, non-combustible Blowing Wool designed for use in masonry separating (party) walls providing a fully filled solution for compliance with both thermal and acoustic related building regulations.


  • British Board of Agrément approved
  • Excellent thermal  performance preventing party wall thermal bypass.
  • Allows a zero effective U-value to be claimed in SAP
  • Non-combustible A1 Euroclass Reaction to Fire classification
  • Excellent sound absorption characteristics
  • Suitable for use with a range of constructions registered in the Robust Details Handbook Unique blue colour provides product recognition in application
  • Dry system requiring no mixing on site, leading to a clean installation with minimal waste.
  • Installed by approved technicians, with no need for product storage on site



Thermal Conductivity (W/mK)Euroclass Reaction to Fire ClassificationArea per Pallet (M²)Pack Dimensions

Robust Details

Robust DetailMinimum Cavity WidthBlock TypeBlock Density (kg/m³)FinishesParge CoatZero U-Value
E-WM-1275mmPlasmor Aglite Ultima1050DrylineYesYes
E-WM-275mmLightweight Aggregate1350-1600Wet plasterNoYes
E-WM-375mmDense Aggregate1850-2300DrylineYesYes
E-WM-475mmLightweight Aggregate1350-1600DrylineYesYes
E-WM-575mmBesblock Star Performer1528DrylineYesYes
E-WM-11100mmBesblock Star Performer1528DrylineYesYes
E-WM-11100mmLightweight Aggregate1350-1600DrylineYesYes
E-WM-175mmDense Aggregate1850-2300Wet plasterNoYes
E-WM-16100mmDense Aggregate1850-2300DrylineYesYes
E-WM-18100mmDense Aggregate1850-2300Wet plasterNoYes
E-WM-19100mmBesblock Star Performer1528DrylineYesYes
E-WM-19100mmDense Aggregate1850-2300DrylineYesYes
E-WM-19100mmLightweight Aggregate1350-1600DrylineYesYes
E-WM-21100mmLightweight Aggregate1350-1600Wet plasterNoYes
E-WM-26100mmBesblock Star Performer1528DrylineNoYes
E-WM-28100mmLightweight Aggregate1350-1600DrylineNoYes
E-WM-31100mmH+H Celcon Elements575DrylineNoYes

* Partial sheathing of the cavity faces of the separating wall for structural reasons is permited but the cavity width must be 50mm including sheathing (Timber Frame Party Wall Slab only)


Supafil® Party Wall BBA certificate (certificate number: 14/5176)
Eurofins Gold
A1 Euroclass Fire Rating
Green Guide Rating A+
CE Marking
TÜV Nord