External wall insulation is the most efficient way of improving walls
thermal conductivity. It wraps up buildings external walls and uses them
as thermal mass just like storage heaters. Walls accumulate the heat and
prevent temperature fluctuations keeping constant and comfort conditions.
Unlike internal insulation (dry lining)
the external insulation keeps
walls away from outside weather conditions. That prevents vapour
condensation, frost penetration and consequently mould formation.
Typical external wall insulation system consists of insulation layer covered with waterproof and decorative coating. Insulating material such as polystyrene or mineral wool is fixed to the wall surface with adhesive mortar and mechanical fixings. Top of insulation is than covered with basecoat and steel or fibreglass reinforcing mesh which provide durability and impact resistance. Finally, external cement-based render is applied to provide weather resistance and customer choice of colour and finish.
The answer is simple – to spent less on heating bills. The better the wall insulation is, the less heat will escape through it and hence the less energy will be necessary to use. As the energy prices increases constantly and it doesn’t seem likely to reverse or even stop, the only reasonable move is to stop wasting it.
The solution is to insulate all the external elements of the house, in particular the external walls as this is, in most cases, the largest heat loss element of the house.
| External insulation | Internal insulation | |
|---|---|---|
| Wetherproof protection | Yes | No |
| Thermal bridging | No | Yes |
| Dew-point within the wall | No | Yes |
| Improves the air tightness | Yes | No |
| Increases the thermal mass | Yes | No |
| Improves the appearance | Yes | No |
Please contact us if you wish to order a free survey and get a quote for external wall insulation.