Glass Mineral Wool - Earthwool Masonry Party Wall Slab


Party separating walls


Glass Mineral Wool


Earthwool Masonry Party Wall Slabs are non-combustible Glass Mineral Wool slabs, manufactured using our revolutionary ECOSE® Technology and are designed for use in masonry separating (party) walls providing a full-fill insulation solution which is installed as walls are being built.


  • Excellent thermal  performance 
  • Fully filling the party wall cavity allows a zero effective U-value to be claimed in SAP
  • Non-combustible A1 Euroclass Reaction to Fire classification
  • Excellent sound absorption 
  • Suitable for use with a range of constructions registered in the Robust Details Handbook 
  • Slabs are sized to fit between wall ties and knit together at joints



Thickness (mm)Length (mm)Width (mm)Euroclass Reaction to Fire ClassificationFacingArea Per Pack (M²)Area per Pallet (M²)

Robust Details

Robust DetailMinimum Cavity WidthBlock TypeBlock Density (kg/m³)FinishesParge CoatZero U-Value
E-WM-11100mmLightweight Aggregate1350-1600Plasterboard on dabsYesYes
E-WM-19100mmBesblock Star Performer1528Plasterboard on dabsYesYes
E-WM-3275mmLightweight Aggregate1350-1600Plasterboard on dabsNoYes
E-WM-31100mmH+H Celcon Elements575Plasterboard on dabsNoYes
E-WM-2975mmWienerberger Porotherm850-950Plasterboard on dabsYesYes
E-WM-26100mmBesblock Star Performer1528Plasterboard on dabsNoYes
E-WM-25100mmWienerberger Porotherm850-950Plasterboard on dabsYesYes
E-WM-22100mmPlasmor Aglite Ultima1050Plasterboard on dabsNoYes
E-WM-22100mmLightweight Aggregate1350-1600Plasterboard on dabsNoYes
E-WM-21100mmLightweight Aggregate1350-1600Wet plasterNoYes
E-WM-19100mmLightweight Aggregate1350-1600Plasterboard on dabsYesYes
E-WM-19100mmDense Aggregate1850-2300Plasterboard on dabsYesYes
E-WM-18100mmDense Aggregate1850-2300Wet plasterNoYes
E-WM-16100mmDense Aggregate1850-2300Plasterboard on dabsYesYes
E-WM-1375mmAircrete600-800Plasterboard on dabs on cement renderYesYes
E-WM-1275mmPlasmor Aglite Ultima1050Plasterboard on dabsYesYes
E-WM-11100mmBesblock Star Performer1528Plasterboard on dabsYesYes
E-WM-1075mmAircrete600-800Plasterboard on dabs on cement renderYesYes
E-WM-675mmAircrete600-800Plasterboard on dabs on cement renderYesYes
E-WM-575mmBesblock Star Performer1528Plasterboard on dabs on cement renderYesYes
E-WM-475mmLightweight Aggregate1350-1600Plasterboard on dabsYesYes
E-WM-375mmDense Aggregate1850-2300Plasterboard on dabsYesYes
E-WM-275mmLightweight Aggregate1350-1600Wet plasterNoYes.
E-WM-175mmDense Aggregate1850-2300Wet plasterNoYes

* 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)


Eurofins Gold
A1 Euroclass Fire Rating
Green Guide Rating A+
CE Marking
TÜV Nord
Robust Details

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