Monthly Archives: July 2016

external wall insulation EWIPRO

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;

  • Save energy and therefore save money on bills
  • Improves the external appearance of home
  • Improves the acoustics within your home – sound proofing
  • Takes up no internal floor space
  • Keeps home warmer in the winter and cooler in the summer (many people report that their houses stay so warm that they hardly need to turn the heating on)
  • Prevents damp and condensation
  • Prolongs the life of your building – protects against extremes of weather
  • Can increase the value of your property in terms of external appearance and Energy Performance Certificate Rating
  • Low maintenance and long lasting

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 check 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 three insulation materials: mineral wool, expanded polystyrene (EPS) or extruded polystyrene (XPS) boards. Mineral wool is durable, breathable and highly fire retardant. 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 of materials or give us a call and we can put you in touch with one of our approved installers who will be able to carry out the work for you to the highest standard. All our installers are given full training and we offer a free aftercare service for customers.

Check out our video with TheGreenAge all about installing external wall insulation!

Calculating the Cost of an External Wall Insulation System

Calculating the cost of solid wall insulation is not as simple as you may think. There are a huge number of components in a solid wall insulation system including adhesives, fixings, the insulation boards, as well as the finish required. Therefore, trying to calculate exactly how much materials cost can be tricky, especially when the different materials cover different areas – for example our reinforcement mesh comes in 50m rolls, while a bag of EWI-220 Adhesive will cover 3m2 of wall.

Call us if you need help with calculating the cost of the External Wall Insulation Materials

At EWI Store, we are here to help! We have a great team who are on hand to help with any quote you may require. Simply give us a call with some rough measurements of the area that needs to be insulated using our EWI systems and we can quickly calculate exactly what you need.

Use our EWI Calculator to calculate the External Wall Insulation materials you require

If you have some experience of solid wall insulation, you might want to use our EWI materials calculator.


We have designed this to be a very easy to use calculator to help calculate the correct materials needed for a solid wall insulation install.

Trade installers get fantastic prices and warranties on the system

So whether you are a homeowner looking to install solid wall insulation or a fresh new render façade on your home; a solid wall insulation installer looking for an easy to install product (at a great price); or an architect looking for a way to vastly improve the thermal efficiency of an old property, you have come to the right place.

As an installer you may well be eligible for our trade discount prices too – so not only do you get a BBA Approved external wall insulation system delivered directly to site, you also get the materials at a great price. As a trade partner we are also able to offer system warranties – provided the installers have been on our free training course.

We also offer a huge range of brick slips!

We also now are delighted to say we have a huge range of brick slip finishes for those looking to recreate the brick feel of their property (i.e. don’t want to simply render a brick wall). These acrylic brick slips are not only incredibly realistic, they are also extremely robust, so despite being flexible and easy to install, they look the part and will last!

So there you have it – if you need some help calculating the material requirements for an EWI job, give us a call – our team are on hand to help!

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