Thermal, Fire, Acoustic, Ventilation.

External Walls

Insulating Solid Wall Externally

Did you know that around 45% of the heat lost in an un-insulated solid walled home is through the walls? Insulating your solid walls can reduce heat loss and can save you around £400 a year on your fuel bills.

If your home was built before or around 1920, its external walls are likely to be solid rather than cavity walls.

Solid walls have no gap (cavity) and this allows more heat to pass through them than through cavity walls. In fact, twice as much heat can be lost through an uninsulated solid wall as through an uninsulated cavity wall.

Insulating Solid Walls Internally

• Generally cheaper to install than external wall insulation
• Doesn’t alter the appearance of outside walls but it will slightly reduce the floor area of any rooms in which it is applied (the thickness of the insulation is typically around 100mm).
• Is ideally installed at the same time as internal renovation work and re-plastering as this will reduce the costs of the installation.
• As work is being done to the interior of the house, there will be some disruption but the disruption can be minimised by doing it room by room.
• If there are unresolved problems with penetrating or rising damp, these should be resolved before installation.

How can I tell my walls are solid?

Insulating External Cavity Walls

There are a number of ways to insulate a cavity wall during and after construction, below are a few examples.

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