External Wall Insulation

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External Wall Insulation

External wall insulation is usually defined as a layer of insulation that's fixed to an existing wall.

This layer will be finished either with a coat of render or with an alternative cladding to protect it from the elements.

The method is often required for insulating walls on solid wall properties where there's no option for cavity wall insulation, or planning is denied, however, there are other situations where it's the appropriate course of action.

While adding insulation should feel like a no-brainer to improve the thermal efficiency of your home, no form of wall insulation, external wall insulation included, is without some form of challenge — often centred around how you home deals with moisture.

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External Wall Insulation

What are the Advantages of External Wall Insulation?

It reduces heat loss and energy bills
Fewer draughts and increased the sense of comfort
It does not disrupt the house while being installed
This type of insulation does not reduce internal floor area
It allows walls to contribute to thermal mass (the ‘tea cosy’ effect)
It improves not only weatherproofing, but sound resistance too
It increases the life of the wall
It reduces condensation on internal walls

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What are the Negatives of External Wall Insulation?

Potential to cause issues with condensation, which could lead to damp problems
Likely to require planning permission if changing the appearance of your home
May not be suitable for listed buildings or those in Conservation Areas
External wall insulation is thick, which can cause issues around windows, eaves and sills
It's an expensive process