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External wall insulation
Frequently asked questions

What is External Wall Insulation (EWI)?

External Wall Insulation from Caparol coats your property with solid insulation material. The insulation is supplied in boards, which are mechanically fixed to the exterior. A basecoat is then applied, followed by a primer and finishing render chosen from a wide range of textures and colours to achieve the appearance you want. It's particularly suitable for solid-walled properties, properties with narrow, irregular or damaged cavities, and for non-standard constructions. It also delivers great results on commercial buildings.

How does External Wall Insulation work?

External Wall Insulation hugely reduces the amount of heat lost through the walls of your property by trapping heat, preventing it from escaping to the external atmosphere. The insulation boards that are part of the system installed by P3 have superior resistance to heat transfer, so more of the heat you put into your property stays where you intended it to. Technically, the u-value of your walls is being reduced (typically from 2 currently to 0.3 once EWI has been installed). A u-value is a measure of how much heat is transferred through a given material; the lower the value, the lower the heat transfer.

How much does External Wall Insulation cost?

Each property will have specific requirements, so it is difficult to give a guide-figure. Instead, P3 commits to giving you a free survey and quotation so you will have an exact figure, so you can budget from your own resources or explore our finance options with our help. Simply contact us to arrange your free external wall insulation survey.

How long does External Wall Insulation take to install?

A typical installation takes 2-4 weeks. P3 will ensure sufficient installation teams are employed to achieve this, regardless of the size of the building. The installation is weather-dependent though. The basecoats and renders cannot be applied when the outside temperature is below 5°C, nor in periods of very extreme hot weather. Also, the system should be protected from the rain. We will take all steps to protect your installation, but there may be times when we have to withdraw from site due to extremes of weather. This is always taken into consideration by the P3-approved installer team and any rescheduling will be clearly communicated to you.

Will there be any disruption for me or my tenants?

P3 is committed to making any installation as smooth as possible. All work takes place on the outside of your building so you can live in the property as normal during installation. And, we can ensure that TV reception is not interrupted by arranging temporary fixing of the satellite dish or aerial during installation.

Meet Bob, Jen, John and Jill

Caparol’s video guide to External Wall Insulation

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Your home designer

Create an individual design for your house with our home designer tool. Preview the transformation of how your house can look with Caparol’s external wall insulation.

Discover the possibilities
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Energy Saving Tips

Trust the elephant to give you handy tips on how to become a more energy-efficient household. Take the steps to creating a brighter warmer future for your family.

Read more
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Before and After Photos

View a selection of our external wall insulation projects - see how Caparol can transform the look of your home, while saving you money.

See the transformation
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Energy Savings Calculator

Our energy savings calculator gives you an accurate figure of the potential fuel bill savings with external wall insulation.

Let’s do the maths
  • We have lived in our house since it was first built in 1960. We had damp patches with mould on the walls, we saw a neighbour’s house with external wall insulation and thought it was a good idea. We were impressed by P3 taking care of all the alterations, plumbing, heating pipes. The whole service was very professional. The installers were polite and tidy and very obliging. The house looks excellent, we have no more damp and it's warmer.

    Dennis and Pat Leech, Homeowners, St Sampsons

  • Using EWI has greatly improved the appearance of our house, and we hope that over time the insulation will add value and save us money on heating bills. Dealing with P3 has been very straightforward and we have had no issues at all - quotes were received quickly and the work done to a high standard. We would be happy to use P3 again in future.

    Tony Bazzaz, Homeowner, Castel

  • Our house was cold, damp and had black mould inside, especially the front bedroom facing the North East. One of our friends had external wall insulation and recommended P3 as an installer. We now have a home that looks great, is cool in the summer and warm in the winter. The installers were a pleasure to have around and were always pleasant and considerate and we would recommend them to anyone who asked.

    Tony England, Homeowner, Vale

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P3 Facades & Interiors

Unit 5 Pitronnerie

Industrial Estate

Pitronnerie Road

St Peter Port



United Kingdom

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+44 (0)1481 740 396

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