Kemwell Rainscreeen Insulation


Kemwell Rainscreen Façade Insulation

A1 non-combustible stone mineral wool insulation for use with lightweight steel framed systems

Kemwell range of stone mineral wool rainscreen façade insulation slabs are used with lightweight steel framing systems which can offer building designers a variety of colours and aesthetic options and are vital in protecting buildings from the environment.

Kemwell insulation boards are classified A1 non-combustible stone mineral wool slabs as defined in BS EN 13501-1.

When combined with other Kemwell products, such as our A1 non-combustible WeatherKem® Fibre Cement Sheathing Board and Kemwell Firebreather fire-rated ventilated cavity barrier, the Kemwell rainscreen façade insulation solutions can provide fire performance, thermal and acoustic performance and weather resistance in a complete package for all buildings, including those above 18m in height. 

You can specify Kemwell Rainscreen Façade Insulation with confidence.

Kemwell IsoVent-M rainscreen façade insulation for thermal, acoustic and fire insulation and is suitable for use on all buildings, including those above 18m in height, providing compliance with fire related building regulations.


  • External insulated façade
  • External walls with stone, glass or cladding panel façade
  • Cavity walls
  • Internal stud walls
  • Acoustic screens
  • Flats and residential properties
  • Student accommodation
  • Healthcare
  • Hotels
  • Education
  • Commercial buildings and offices

Kemwell IsoVent-M is made from stone mineral wool and manufactured under ISO 9001:2015 to guarantee product consistency and quality. Every slab is made from natural raw materials and is treated with a water repellent additive during manufacture to ensure water is not absorbed in use.

What sizes are available?
  • Standard Board Size 1000 x 600mm
  • 1200 x 600mm available to order


Do you have a current requirement for your project?


Fire Resistance

Euroclass A1 non-combustible board providing excellent protection against fire and is rated to BS EN 13501-1.

Moisture and Weather Resistant

Kemwell Rainscreen Façade Insulation is hydrophobic (will not absorb moisture – particularly important during construction) and will not deteriorate when used in damp or humid conditions and will not encourage mould or bacteria growth. Boards will repel water yet remain breathable, limiting the risk of condensation.

Easy Workability

Easy to handle can be easily cut to accommodate installation requirements and will simply butt together at joints.

Thermal Performance

Has excellent thermal performance and will provide comfortable internal spaces and will also allow walls to breathe.

Acoustic Performance

Has excellent sound reduction with high levels of sound absorption. The insulation absorbs and reflects sound, trapping and dampening sound waves to help provide comfortable living and working environments.

Chemical Stability

Resistant to chemical and biological corrosion and is chemically inert and compatible with most materials in normal building applications.


The durability of Kemwell Rainscreen Façade Insulation is a feature of the modern manufacturing systems.


Produced from natural raw materials. The boards help to ensure optimal temperature regardless of the weather conditions and its thermal properties can dramatically reduce heating, cooling and ventilation costs, helping to reduce a building’s carbon footprint.

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