PermaRock Products Ltd

Jubilee Drive
LE11 5TW
United Kingdom
T: 01509 262924
View Website

PermaRock Products Ltd

PermaRock Products Ltd is the longest established UK owned designer, manufacturer and supplier of external wall insulation (EWI) systems and as such has a comprehensive understanding of all stages of the development and installation of EWI systems, with nearly 30 years experience of supplying external wall insulation to the construction and energy efficiency sectors in the United Kingdom.

PermaRock has developed a portfolio of high quality render protected external wall insulation, alongside specialist render systems, for existing and new buildings that deliver significant environmental benefits by reducing heating/cooling energy demand and heat energy losses whilst offering an extensive offering of renders, finishes and decorative effects.

External Wall Insulation - New Buildings

With increased importance being placed on the design of low carbon buildings, PermaRock external wall insulation (EWI) systems can help towards the creation of effective, energy efficient and sustainable developments. Working closely with building designers and specifiers, PermaRock can advise from design stage through to installation on how the external wall insulation element of a project can meet low carbon design requirements and how they be utilised to achieve or exceed Passivhaus, BREEAM, Code for Sustainable Homes (Levels 4-6) and similar performance standards.

All PermaRock systems are complimented by an extensive range of renders and decorative finishes including acrylic and silicone based textured renders, metallic-effect renders and brick and stone finishes as well as architectural profiles and waterproof coatings providing an almost limitless options for texture, colour, shape and form.

External Wall Insulation - Existing Buildings

PermaRock Systems have undergone extensive testing to relevant British and European standards and have been independently assessed by a UKAS Accreditation certification

body, the Building Research Establishment (BRE) - Certificate No. 158/12, to ensure their compliance with current UK Building Regulations onto a variety of solid wall and non-traditional

substrate types, including, masonry (brick / block), dense and no-fines concrete, and light gauge steel frame and timber frame constructions.

Under BRE Certificate No. 158/12 the following PermaRock accredited external wall insulation systems are compliant to the Green Deal Code of Practice and PAS 2030 for use under the Green Deal and the Energy Company Obligation (ECO) energy efficiency initiatives:

Mineral Fibre (Mineral Wool) EWI System

Phenolic EWI System

EPS EWI System

EPS-Premium (Grey) EWI System

Decorative Finishes:

Acrylic Through Coloured Renders

Silicone Through Coloured Renders

Dash Finish

Brick Slips

Brick Effect Render

PermaRock systems are approved for use in all locations in the UK including those considered to be ‘very severe exposure’ locations for wind driven ran and systems are available in differing thicknesses of insulation product to suit project specific U-value requirements.

PermaRock offers a full technical support service from initial design, thermal and condensation risk assessment, site inspections, specifications, method statements, standard and non-standard details, provision of in-situ testing of fixings, and on-site technical support for its approved installers under Quality Assurance Management Accreditation (BS EN ISO 9001).

PermaRock systems are equally suitable for New Build and Refurbishment and we have extensive experience working within all sub-sectors of these markets including housing (social and private), education, healthcare and commercial sectors with systems installed through our nationwide network of approved applicators. These specialist installers, are vetted, trained and monitored by PermaRock to ensure quality standards are maintained.


For Green Deal and Energy Company Obligation (ECO) schemes, PermaRock provide a 25 Year Materials Guarantee on all PermaRock external wall insulation systems. In addition to the 25 Year PermaRock materials guarantee supplied as standard on all Green Deal and ECO projects, options are available for the 25 Year Solid Wall Insulation Guarantee Agency (SWIGA) Guarantee and also the 25 Year PermaGuard Insurance-Backed Guarantee for domestic installations for the Green Deal and Energy Company Obligation (ECO) schemes.

These guarantees can be invoked should either the supplier and/or installer have ceased trading.

For non Green Deal and Energy Company Obligation (ECO) schemes Insurance-Backed Guarantees are available for periods of cover up to 20 Years.


Specification news
Compliance and performance without compromise -...



Specification news
PermaRock External Wall Insulation & Renders - NBS BIM...

With over 30 years’ experience in the new build and retrofit markets, leading...


Specification news
PermaRock EWI and renders available at NBS BIM Library

With over 30 years’ experience in the new build and retrofit markets, leading...