Are there considerations before choosing External Wall Insulation?

Yes, there are several factors to consider before installing External Wall Insulation (EWI):

• Adequate ventilation should be maintained to help prevent condensation and mould growth.
• Planning permission may be required if the installation changes the appearance of the building, particularly for listed buildings or properties within conservation areas.
• EWI increases the thickness of the external wall, which may require adjustments to window reveals, roof eaves, rainwater goods, and window sills.