How can I insulate my external walls?

Why should I consider external wall insulation?

Perhaps you have installed cavity wall insulation but are looking for a bigger impact, or maybe you live in a solid walled property. We recommend external wall insulation for a number of reasons; aside from the obvious benefit of increased thermal efficiency, it helps protect walls, muffles sound and can improve the appearance of your home. It’ll save on your bills and is a relatively quick and simple procedure. Installed by an expert, the measure can be finished in as little as a week – depending on the size of the job.

A quick run through of the main stages of installation:

First, the wall is prepared to make sure the insulation system will stick. It should be possible to install our insulation system on top of existing render or pebbledash, but at this point a substrate chec will need to be done. Next, the surface is primed and this needs to set for 24 hours. A starter track is attached to the wall above the damp proof course to support the insulation boards. They are then attached with adhesive and double-fixed with mechanical fixings. Fibreglass mesh is used to reinforce the system and then the wall is rendered and a topcoat applied. Each part of the system is designed to minimise cold bridging and maximise efficiency.

Can I choose the materials?

All the steps work together to create an effective, attractive and long-lasting system. It’s a customisable system – the householder can choose between two insulation materials: mineral wool or expanded polystyrene boards. Mineral wool is durable, breathable and highly fire retardant. Expanded polystyrene insulation is cheap and a fantastic insulator, so a thinner layer can be added to achieve the same results as a larger amount of mineral wool.

There is also a choice of render, tailored to different environments, as well as options for the final colour and texture of the walls.

How much does external wall insulation cost?

Fill in our calculator to find out approximate costs and we can put you in touch with one of our approved installers to carry out the work for you. All our installers are given full training and we offer a free aftercare service for customers.