RockClose® EN
RockClose® EN is an insulated cavity closer designed to minimise thermal bridging around windows and doors. It also acts to inhibit the passage of smoke and fire within masonry, timber, and steel frame constructions.
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Application(s)
- External Wall
- Cavity Wall
- Steel Frame
- Timber Frame
Product description
RockClose EN consists of a strip of semi-rigid, non-combustible ROCKWOOL insulation bonded to a flexible waterproofing layer for external wall applications requiring a DPC separation layer.
The product has been tested to BS EN 1366-4:2021 to provide up to 60 minutes integrity and insulation depending on the application.
RockClose EN is designed to be installed between the outer masonry leaf and closing inner leaf /substrate prior to fitting the window and door frames. It is suitable for gaps between 20mm and up to 50mm wide.
- Waterproofing layer in accordance with EN 14909 standards
- Thermal conductivity 0.035 W/mK
- Tested in accordance with BS EN 1366-4 (horizontally and vertically)
- Classified in accordance with BS EN 13501-2
Areas of application
RockClose EN is suitable for use on the following construction types:
- Cavity Wall
- Timber frame
- Steel frame
Documentation
RockClose EN Datasheet
RockClose® EN is an insulated cavity closer designed to minimise thermal bridging around windows and doors. It also acts to inhibit the passage of smoke and fire within masonry, timber, and steel frame constructions.
RockClose EN - UL 4790883244-01-en-b - Classification Report
RockClose EN - UL 4790883244-01-en-b - Classification Report. This classification report defines the classification assigned to the element RockClose EN-B, in accordance with the procedures given in BS EN 13501-2: 2016.
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 | 0.035 | EN 826 | λD | W/mK |
| Reaction to Fire | NPD | EN 13501-1 | Euroclass | |
| Long term water absorption | NPD | EN 12087 | WL(P) | kg/m² |
| Short term water absorption | NPD | EN 1609 | WS | kg/m² |
| Product standard | ||||
| Facing type, side 1 | No Facing |
Product variants
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