Cavity System 2

Cavity systems are extensively used on lightweight framed structures to create a void between the cladding and the sheathed framed structure. Our CS systems 1 & 2 are the next generation of this solution.

These market-leading Cavity Systems consist of Euroclass BS EN 13501 – A1 components, which are mechanically fixed back to the inner sheathing board to create the designed cavity width with either the insulation board fitted directly to the A1 fillets (CS1 system), or a secondary A1 sheathing board and insulation (CS2 system). Our A1 EWI recladding systems are supplied with a mineral top coat finish.

A proprietary base coat render is applied with a reinforcing plastic coated glass fibre mesh prior to the application of the required finishes.


Key Benefits

  • Kiwa BDA Agrément Approved
  • Accepted by all building warranty providers
  • Compliant with Approved Document B and Technical Handbook section 2
  • Minimum EuroClass Reaction to Fire classification of A2 – s1, d0

  • EuroClass A1 support system
  • Takes cladding out of the critical path by quickly weatherproofing the building
  • Low-cost cladding solution
  • Fast application

  • Tried and tested
  • Wide range of colours and finishes including brick slips
  • Easily achieves high levels of thermal performance
  • Highly durable and weather resistant

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Cavity System 2, components

  • Cavity System 2 featuring a Horizontal Intumescent Strip Firebreak

Façade Finishes

SpeedySlip provides the traditional appearance of a brick finished building but with technology of a lightweight acrylic or mineral brick slip finish....
Enviromin is a high-performance, cement based and polymer modified through coloured mineral thin coat render and is based on a colour fast lime bloom free...
Façades designed to stand the test of time Supertech Weatherboard is a simple to install, fully ventilated rainscreen cladding system which has an appearance...
EnviroSil is a pre-mixed, highly water repellent silicone based through colour textured finish, allowing the façade to maintain its cleanliness via the...

Wheatstone House Case Study

Eye-catching, fire-safe Cavity System 2 and SpeedySlip Brick Façade for Wheatstone House, London What does 10 Downing Street and Tate Modern have in common? Aside from being some of the UK’s most distinctive buildings, they are all built with brick.

SPSenvirowall provided its innovative new product, the Cavity System 2 to the development in London. It included external wall insulation and SpeedySlips delivering results which are outstanding and produce an intriguing and engaging brickwork façade. Eight storey Wheatstone House provides 95 one, two- and three-bedroom homes including commercial space and amenities.





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Cavity System Brochure

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Training Courses Available for Cavity System 2


Used to allow insulated structures to easily release excess moisture vapour into the atmosphere and keep the internal elements of wall structures dry.
Beads for a rendered façade will ensure the best finished look, ensure durability and help protect the render from water damage and cracking.
The Benx range of silicone, acrylic and mineral renders are a great way to achieve a perfect and long lasting finish.
Insulation products for walls, roofs and floors We supply three key types for both EWI and Rainscreen Cladding Systems
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    SPS Envirowall guide to Cavity System 2