External Wall DD Slab
External Wall DD (Dual Density) Slab is a dual density stone wool insulation product for external wall insulation systems.
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Application(s)
- External Wall
- ETICS / EWI
Product description
External Wall DD (Dual Density) Slab for external walls is manufactured using Dual Density technology. The outer surface of each slab features a higher density than the underside providing a firm surface for the application of fixings, while the underside can accommodate unevenness in the substrate. Pre-installation trials are recommended to determine that the level of unevenness in the substrate can be covered without gaps forming between slabs.
Once installed and tightly joined together, the edges knit together, providing a continuous insulating layer of trapped pockets of air with no gaps and no associated loss of thermal performance.1
- Euroclass A1 in accordance with BS EN 13501-1 Reaction to Fire rating
- Thermal conductivity 0.036W/mK
- Classified in accordance with EN 13162
- CE marked
Areas of application
External Wall DD (Dual Density) Slab is suitable for use on the following construction types:
- External walls
Documentation
EWI System Holders Datasheet
External Wall Dual Density Slab is a dual density stone wool insulation product for external wall insulation systems.
SUIS ROCKWOOL UK
Safe use instruction sheet ROCKWOOL stone wool insulation products
Republic of Ireland Price List
Price List March 2025
UK Price List
Price List March 2025
Product properties
| Name | Value | Test standard | Symbol | Unit |
|---|---|---|---|---|
| Declared thermal conductivity | 0.036 | EN 826 | λD | W/mK |
| Reaction to Fire | A1 | EN 13501-1 | Euroclass | |
| Long term water absorption | WL(P) | EN 12087 | WL(P) | kg/m² |
| Product standard | EN 13162:2012+A1:2015 | |||
| Declaration of Performance (DoP) number | UK-WER-0026-02_english | |||
| Facing type, side 1 | No Facing |
Product variants
References
ROCKWOOL® helps alleviate fuel poverty at Wilmcote House - case study
Wilmcote House is the largest residential EnerPHiT project delivered with residents in-situ in the world and is a testament to what can be achieved by taking a holistic, fabric first, people-focused approach to building refurbishment.
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