You’ve likely researched, considered and made an informed purchase decision on insulating your home internally. But when it comes to external walls on properties, information online can be much more difficult to find.
If you’re looking to find out the answers to questions like “What kind of insulation should I use for external walls?” and “How does external wall insulation work?”, then you’re in the right place. So without further ado, let’s delve into this topic in detail…
What is External Wall Insulation?
External wall insulation is unlike internal wall insulation as it is applied directly onto an external surface, and is completely invisible when dry.
There’s no panels to be nailed in, material to be stuffed into cavities, or foam to be dried. External wall insulation is an industrial chemical spray that’s specially designed to bond with bricks and concrete, and protect exterior walls from the elements.
You can’t see it, but the chemical spray sticks to the outside walls and penetrates them slightly – up to about 17mm in.
How Does it Protect My Property?
Once applied, the spray acts to protect the surfaces against water, oil, dirt, algae mildew, and mould. The walls will look considerably cleaner, as any dirt or grot will just run right off them with water.
External wall insulation ensures that rather than acting as a thermal bridge, allowing vapour and cold air to pass through (and then hit your indoor walls and interior insulation), it acts as a thermal barrier, stopping it in its tracks and rendering it impenetrable.
Exterior wall insulation has been proven to reduce water absorption by over 95% compared to non-insulated walls. This of course keeps your home warmer, but also prevents damp from entering your home.