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External Wall Insulation

External wall insulation is a highly advanced insulation system that is applied to a house’s outside walls. The system comprises of a layer of insulation, a layer of insulating render implanted with reinforcing mesh, followed by a final coat of render finished to the desired decorative effect.

External wall insulation is a particularly effective method of insulation for homes constructed from solid walls, referred to by some as ‘hard to treat’, because quite simply they have no cavity which can be filled with insulation. External wall insulation is applied to the outer face of a property’s walls improving the thermal efficiency of the walls significantly as well as giving the property a new and/or improved look.

Uninsulated solid walls lose even more heat than cavity walls, at a rate of around 45 per cent, meaning that for every £100 spent on heating an uninsulated solid wall property, something like £45 is escaping into the outside environment

Features and Benefits

The key benefits of external wall insulation are:

  • Reduces heat loss by up to 45 %
  • Could save you £45 for every £100 currently spent on your heating bill
  • Provides a high level of thermal efficiency making your home warm and cosy
  • Minimum disruption for the householder
  • No reduction of interior living spaces
  • Can help with condensation problem and black mould growth
  • Improves appearance of the building
  • Complements the existing building and colours
  • Has long term durability
  • Virtually maintenance free
  • BBA (British Board of Agrément) approved

The key features of external wall insulation are:

  • Available in over 300 colours
  • Choice of textured finishes
  • Crack resistant
  • Water repellent
  • Ten year guarantee
  • BBA (British Board of Agrément) approved

Product Information

Manufacturers of external wall insulation systems require insulation installers to be approved before they can install their products, because of the complex installation process which must be carried out by experienced, skilled professionals. Domestic and General are approved to fit the following systems:

  • Permarock
  • Powerwall
  • Weber
  • Wall-Reform I/II

As part of the free home survey, Domestic and General will specify the best product for your particular property

Technical Information

Heat will always flow from a warm area to a cold one, and in winter, when it is even colder outside, the heat will escape from your home into the surrounding air even quicker.

External wall insulation can significantly slow down the rate at which heat escapes, keeping as much of it inside your home as possible.


Contact us for a no obligation quote