The Installation Process

Allowing for normal weather conditions and preliminary works, installation of an external wall insulation system on a typical semi-detached house can take between 3 – 5 weeks but this can be longer in winter months, or if bad weather impacts on the installation.

Similarly, if additional enabling works or structural repairs, etc are required this timeframe is likely to be extended.


Stage 1 - Preliminary Works

  • Enabling Works (Adaptation or Temporary Removal of Cables, Pipes, External Fixtures & Fittings, Shrubs / Bushes, etc)
  • Scaffolding erected
  • Protection of surfaces

Stage 2 - Installation of System

  • New Cills / Trims fitted
  • Insulation Boards fixed
  • 1st Layer of Base Coat + Reinforcing Mesh Applied
  • 2nd Layer of Base Coat Applied
  • Decorative Finish Applied

Stage 3 - Post Installation Works

  • Replace items removed during the preparatory works
  • Clean down windows, sills, frames and doors, etc
  • Excess materials + equipment removed
  • Scaffolding removed
  • Handover documents issued


Planning Requirements

As external wall insulation can change the appearance of a property, planning permission may be required. This is particularly relevant in conservation areas and on listed buildings so advice should be sought from your local planning office prior to any works taking place. 

If you insulate a solid wall you also have to make sure it complies with the current Building Regulations requirements in relation to thermal performance of your property - as a rough guide you will need around 90 mm of insulation to achieve this, dependant upon which insulation material is used. 

Your chosen installer will be able to advise on the thickness of insulation required and assist with any requirements to progress your installation.

Additional Home Improvements

If you are planning any other improvements (new windows, extensions, etc) it is advised to undertake these works in advance of the external wall insulation, your registered installer will be able to assist you accordingly.

Preliminary Works & Installation

All preparatory works and adaptations (i.e. rainwater goods / waste pipes / overflow outlets / soil stacks / boiler flues / roof overhang / BT works / satellite dishes, etc.) are removed or adapted before installation.

Installed from scaffold, application will occur whilst you remain in your property and disruption is minimal, however, as part of the installation process drilling and mixing machines will be in use whilst work progresses.

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