

Application
Application
Party separating wallsMaterial
Glass Mineral WoolDescription
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.
Benefits
- 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
Product
Specifications
Thickness (mm) | Length (mm) | Width (mm) | Euroclass Reaction to Fire Classification | Facing | Area Per Pack (M²) | Area per Pallet (M²) |
---|---|---|---|---|---|---|
75 | 1200 | 455 | A1 | Unfaced | 8.736 | 174.720 |
100 | 1200 | 455 | A1 | Unfaced | 6.552 | 131.040 |
Robust Details
Robust Detail | Minimum Cavity Width | Block Type | Block Density (kg/m³) | Finishes | Parge Coat | Zero U-Value |
---|---|---|---|---|---|---|
E-WM-11 | 100mm | Lightweight Aggregate | 1350-1600 | Plasterboard on dabs | Yes | Yes |
E-WM-16 | 100mm | Dense Aggregate | 1850-2300 | Plasterboard on dabs | Yes | Yes |
E-WM-1 | 75mm | Dense Aggregate | 1850-2300 | Wet plaster | No | Yes |
E-WM-2 | 75mm | Lightweight Aggregate | 1350-1600 | Wet plaster | No | Yes. |
E-WM-3 | 75mm | Dense Aggregate | 1850-2300 | Plasterboard on dabs | Yes | Yes |
E-WM-4 | 75mm | Lightweight Aggregate | 1350-1600 | Plasterboard on dabs | Yes | Yes |
E-WM-5 | 75mm | Besblock Star Performer | 1528 | Plasterboard on dabs on cement render | Yes | Yes |
E-WM-6 | 75mm | Aircrete | 600-800 | Plasterboard on dabs on cement render | Yes | Yes |
E-WM-10 | 75mm | Aircrete | 600-800 | Plasterboard on dabs on cement render | Yes | Yes |
E-WM-11 | 100mm | Besblock Star Performer | 1528 | Plasterboard on dabs | Yes | Yes |
E-WM-12 | 75mm | Plasmor Aglite Ultima | 1050 | Plasterboard on dabs | Yes | Yes |
E-WM-13 | 75mm | Aircrete | 600-800 | Plasterboard on dabs on cement render | Yes | Yes |
E-WM-18 | 100mm | Dense Aggregate | 1850-2300 | Wet plaster | No | Yes |
E-WM-19 | 100mm | Besblock Star Performer | 1528 | Plasterboard on dabs | Yes | Yes |
E-WM-19 | 100mm | Dense Aggregate | 1850-2300 | Plasterboard on dabs | Yes | Yes |
E-WM-19 | 100mm | Lightweight Aggregate | 1350-1600 | Plasterboard on dabs | Yes | Yes |
E-WM-21 | 100mm | Lightweight Aggregate | 1350-1600 | Wet plaster | No | Yes |
E-WM-22 | 100mm | Lightweight Aggregate | 1350-1600 | Plasterboard on dabs | No | Yes |
E-WM-22 | 100mm | Plasmor Aglite Ultima | 1050 | Plasterboard on dabs | No | Yes |
E-WM-25 | 100mm | Wienerberger Porotherm | 850-950 | Plasterboard on dabs | Yes | Yes |
E-WM-26 | 100mm | Besblock Star Performer | 1528 | Plasterboard on dabs | No | Yes |
E-WM-29 | 75mm | Wienerberger Porotherm | 850-950 | Plasterboard on dabs | Yes | Yes |
E-WM-31 | 100mm | H+H Celcon Elements | 575 | Plasterboard on dabs | No | Yes |
E-WM-32 | 75mm | Lightweight Aggregate | 1350-1600 | Plasterboard on dabs | No | Yes |
* 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)
Certification & Memberships





- Sustainability
We care for the people who make our products, the people who use them and the world we all depend on.
Whilst we are dedicated to supplying sustainable high performance insulation solutions for enhanced energy efficiency in buildings, we also continually strive for improvements in our manufacturing and supply chain operations so to improve quality and minimise our impact on the environment. All Knauf Insulation production locations have state-of-the-art manufacturing equipment and meet the highest quality standards as well as they are supported by an ongoing research and development program. All of our products including Earthwool Masonry Party Wall Slab are sustainably manufactured.
At Knauf Insulation, we have 7 key sustainability considerations:
- to conserve natural resources
- to reduce the evironmental effects of our own processes
- Treating people fairly, along the supply chain
- Delivering our products efficiently
- Building a comfortable and healthy indoor environment
- Performance reporting
- Recognition
- ECOSE® Technology
ECOSE® Technology is our revolutionary sustainable bio-based binder used in the manufacture of all of our glass mineral wool products, and the majority of our rock mineral wool products. invented nearly 10 years ago, it is not only unique, but very much central to our sustainability strategy. Our ECOSE® Technology is present in Earthwool Masonry Party Wall Slab and is just another key benefit of our products.
ECOSE® Technology has 5 key benefits
- A natural binder
- A lower embodied energy
- Proven durability
- Optimum indoor air comfort
- Easy to handle
Downloads

March 2020
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February 2018
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