Glass Mineral Wool - Earthwool Timber Frame Party Wall Slab


Party separating walls


Glass Mineral Wool


Earthwool Timber Frame Party Wall Slabs  are non-combustible Glass Mineral Wool slabs, manufactured using our  evolutionary ECOSE® Technology and are designed for use in timber frame 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 characteristics
  • Suitable for use with a range of constructions registered in the Robust Details Handbook 



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

Robust Details

Robust DetailMinimum Cavity WidthSheathingFinishesExternal (Flanking) WallZero U-Value
E-WT-150mmNone*2 or more layers of gypum based boardOuter leaf masonry min 50mm cavityYes
E-WT-250mmMin. 9mm thick board2 or more layers of gypum based boardOuter leaf masonry min 50mm cavityYes

* 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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