Why External Wall Insulation System?

The use of a PermaRock external wall insulation system will provide key benefits to a building designer when specifying our products, including how systems can contribute to achieving low air permeability of the building envelope, limiting thermal bridging, help improve thermal performance and provide an extensive range of decorative renders and finishes: 

Building Regulations 

System Certification

With over 30 years’ experience of supplying into the UK’s construction sector, PermaRock has been at the forefront of external wall insulation (EWI) development in the UK, obtaining the first British Board of Agrément (BBA) and Building Research Establishment (BRE) accredited external wall insulation systems.

Our commitment to delivering the highest quality systems with the very best in terms of technical performance is reflected in our continued investment in testing to relevant UK / European Standards and certification of our external wall insulation systems. PermaRock systems include third party certification through the Building Research Establishment (BRE) Global Certification Service (Cert No. 158/12), which is recognised under the Building Regulations for England and Wales, Scotland and other European Standard organisations.

Construction Types

PermaRock systems carry independent accreditation which confirms their suitability for application onto timber and steel frame buildings, in addition to concrete and masonry construction. Our drained cavity systems are also available to meet the requirements of NHBC, Trada, Zurich and other buildings insurers who prescribe the inclusion of a drained cavity into the system on frame constructions.

Fire-safe Solutions

One of the major considerations for specifiers, when choosing materials for building façades, is the fire performance of the building envelope components. Particularly important is the performance on high-rise, multistorey buildings, where the criteria described in BR 135 ‘Fire performance of external thermal insulation for walls of multistorey buildings’ 2013 should be considered. Our systems have been tested to relevant standards (inc. BS 8414) and satisfy the requirements of the Building Regulations on masonry, timber and metal frame construction, including, where required, a drained cavity.

Aesthetic Inspiration

With an extensive range of decorative renders and finishes available, PermaRock provides seemingly endless scope to create exciting and inspiring buildings that can compliment and contrast with other cladding materials such as timber, stone, glass and metal.

Whether you choose from our outstanding palette of over 1300 colour shades available with our textured through-coloured renders, scratch renders or our synthetic brick slips, we provide an unprecedented freedom to create uniquely expressive façades.

Further dramatic shape and form can be created through simulated blockwork, shadowlines, ashlar effects and architectural profiles to add further expression.

Find out more about our range of renders and finishes

Thermal Performance

External wall insulation systems can easily be designed to help meet current limiting fabric parameters (U-value and air permeability), outlined in the existing Part L Building Regulations, and will also comfortably meet the increased requirements proposed within Part L Building Regulations in England (April 2014).

Fabric U-values, quoted for new buildings in dwellings and nondwellings, show that a fabric first approach remains critical with the improvements required for new thermal elements and when upgrading retained thermal elements on existing buildings. The increased focus on lowering U-values emphasises the benefits of using PermaRock external wall insulation which can contribute to key requirements such as achieving low air permeability of the building envelope and limiting thermal bridging.

Systems can also be integrated into the design of a building making a meaningful contribution to attaining a high SAP rating.

Low / Zero Carbon Buildings

Incorporating PermaRock external wall insulation into a building envelope design can be a significant aid in achieving the improved energy standards of the Code for Sustainable Homes, Passivhaus and other standards where sustainable and low carbon design standards are described.

PermaRock external wall insulation can significantly reduce cold bridges in walls and help to deliver U-values of 0.15 W/m2K and below. Furthermore, systems can be designed to produce an extremely airtight façade, limiting any thermal bridging or unnecessary heat loss through the building envelope, a very important factor if the goal is to achieve a low energy / zero carbon building.

“…PermaRock provides seemingly endless scope to create exciting and inspiring buildings that can compliment and contrast with other cladding materials such as timber, stone, glass and metal.”

Also In This Section

External Wall Insulation Systems

PermaRock has developed a portfolio of high quality façade solutions that provide architects and specifiers with the freedom to create buildings that are innovative, functional and meet the high thermal performance requirements...

Colour & Sample Selector

Use our innovative and easy-to-use colour and sample selector to view, choose and finalise your colour selections. You can view our entire range of decorative renders and finishes and ordering samples couldn't be easier.
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