External Wall Insulation

External Wall Insulation
External Wall Insulation
External Wall Insulation

External wall solutions comprise of an insulation layer fixed to the existing wall, with a protective render or decorative finish. Dry cladding offers a wide range of finishes such as – timber panels, stone or clay tiles, brick slips or aluminum panels.

Why Externally Insulate?

  • To meet the Decent Homes Standard
    • A decent home is windproof, weathertight and warm, with modern facilities
    • The Government expects all homes to meet this standard by 2010
  • Increases thermal quality of the building
    • Particularly relevant when refurbishing non-traditional housing
  • Overcomes moisture/condensation issues
  • Protects the existing building envelope
  • Reduces heating bills by 25%
  • Improves the building's appearance

What is External Wall Insulation?

  • A method of upgrading the thermal performance and external appearance of existing properties
  • Insulated and rendered properties are transformed into warm, energy efficient and attractive homes/buildings


  • Properties need to be fully surveyed
  • Is substrate suitable for mechanical fix?
  • Is there sufficient overhang on cills/soffits?
  • Gates/satellite dishes, a provision needs to be made for refix
  • Are windows and reveals suitable?
  • Do soil pipes need to be moved?


  • 3 key stages for a typical semi
    • 1) Boarding and beading 1-2 days
    • 2) Base coat and Mesh 2 days
    • 3) Top coat /finish 1days
  • Usually a 3 man team
  • Drying times required for stage 2 up to 48hrs
  • Can only be applied if temp is 5 degrees and rising

Survey & quality monitoring

A quality inspection will be carried out according to industry best practice.

  • Varies from system to system but will normally take place at the 3 critical stages
  • Under CERT independent inspections will also be required
  • Contact your local installer for more details and FREE survey of your property!


What exactly is external wall insulation?

Basically, a system of boards of thermally insulating material that are fixed to the building exterior and finished with a weather resistant, decorative render.

What quality standards are solid wall insulation systems subject to?

All manufacturers are independently audited and accredited to the ISO9001 Quality Management Standard, ensuring consistent monitoring of all manufacturing processes.

Why should I consider external wall insulation?

Up to 35% of heat lost from poorly insulated buildings escapes through the walls. External wall insulation significantly reduces this heat loss, leading to a reduction in annual fuels bills by as much as 25%. External Wall Insulation systems also protect the building structure, prevent deterioration, and overcome thermal bridging and condensation problems. Newbuild In a newbuild instance EWI systems are the most cost effective way of achieving the current & future thermal performance requirements for the building regulations, achieving an internal environment with low temperature fluctuations and low heating requirements.

Will external wall insulation be unsightly?

Far from it. External Wall Insulation systems offer a wide choice of decorative finishes that considerably enhance the visual appearance of a building. A full range of trims and accessories ensures that all detailing issues can be dealt with in an effective and visually attractive way.

What types of building are suitable for external wall insulation?

Virtually all common types of construction - new build (from steel frame to solid masonry) or refurbishment (traditional and non-traditional house types). Contact Manufacturer Technical Services for specific advice.

Is external wall insulation environmentally friendly?

Yes. A majority of solid wall insulation systems are manufactured and independently audited in accordance with ISO14001 Environmental Management Standard. External Wall Insulation systems incorporate insulation materials that are CFC and HCFC-free.

What about BBA certification?

External Wall Insulation systems, Renders and Decorative Masonry Coatings are covered by British Board of Agrément certification. A list of BBA certificates can be found in the BBA area of this website.

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