RockClose® EN

RockClose EN is an insulated cavity closer designed to minimise thermal bridging around windows and doors and also acts to inhibit the passage of smoke and fire within masonry, timber and steel frame constructions.

The product consists of a strip of semi-rigid non-combustible ROCKWOOL insulation, bonded to a flexible waterproofing layer for use in external wall applications which require a DPC separation layer.

• Tested to BS EN 1366-4:2021 to provide up to 60 minutes integrity and insulation depending on application.
• Suitable for use in horizontal and vertical applications to BS EN 1366-4.
• The waterproofing layer is resistant to water penetration and conforms to EN 14909 standards.
• RockClose EN is suitable for use as a cavity closer between a masonry outer leaf and the following substrate types: Masonry, Timber frame faced with OSB, Steel frame with cement particle board.

Further information on the fire performance of RockClose EN can be found in the UL Classification Report