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EXTERNAL WALL INSULATION / REFURBISHMENT/

DESIGN CONSIDERATIONS /

PermaRock's Area Sales Managers and Technical Department are available to provide assistance and advise with external wall insulation (EWI) system specificationas there are a number of considerations that could affect the choice of system and decorative finish proposed:

• Type of Building/Wall Build-Up: The system choice should be suitable for its application (low-rise or high-rise) and for the wall construction type. The building should be structurally sound to accept the system load (a structural survey maybe required) and where necessary, any structural and preliminary works need to be carried out before the EWI system is installed.
• Thermal Performance: What is the required U-value and are there limitations to the thickness of the system which can be accommodated?
• Aesthetics: Is the desired colour available and is the decorative finish suitable for the design and its intended location and exposure?
• Fire Performance: The system should be suitable for low rise and/or high-rise application and, where required, should incorporate fire performance or fire-breaks to meet with building regulations and BR135 requirements.
• Impact Resistance: The decorative finish is selected primarily based on the desired aesthetic appearancewhilst also considering the level of impact resistance necessary. Where required, additional reinforcement should be incorporated into the system design
• Enviromental Performance: The system should incorporate insulation materials which are CFC/HCFC free and which do not employ ozone depleting chemicals in their manufacture. The specifier may also wish to take into account any Eco-points rating a system may have achieved through a life cycle assessment. This process measures its enviromental impact during the systems economic life, from the extraction of the raw materials and components to the disposal (and recycling) of the product at the end of a 60 year life cycle (i.e. cradle to grave)
• Cost: A number of design factors can have an effect on the cost of the system including insulation type and thickness as well as the choice of decorative finishes - PermaRock can advise on the implications of proposed choices to the cost of the system.
• Adaptations: Roof overhang, window & door replacements, plumbing, heating and ventilation requirements should be considered prior to the installation of the EWI system.

Professional Installation - Application of PermaRock systems is undertaken by our nationwide network of trained and approved applicator contractors.

The performance of these applicators is constantly monitored to ensure continued satisfactory performance and PermaRock operate an Identity Card system for external wall insulation site operatives. The cards are monitored and checked by system technicians during routine site visits to ensure system installation is undertaken by trained and experienced personnel and that quality standards are maintained.

PermaRock approved applicators operate in all areas of the UK. PermaRock can provide details, on a project by project basis, of approved applicator companies capable of carrying out the installation of any PermaRock system based on a project size, location and programme requirements.