External Wall Insulation Systems for Refurbishment

External Wall Insulation Systems for refurbishment projects

Did you know that around 33% of heat is lost through uninsulated solid walls?

That's where our External Wall Insulation Systems come in.

Installing External Wall Insulation (EWI) to your home includes adding a layer of insulation material and a render system which will dramatically reduce the amount of heat lost in your home.

What's more, you'll be saving money on your energy bills and reducing your carbon footprint at the same time.

Why Weber External Wall Insulation Systems?

It all started back in 1974 when we provided materials in Greenlock, Scotland for the very first UK External Wall Insulation system installation – we're the only external wall insulation system manufacturer with over 40 years' experience!

We're also certified by the British Board of Agrément and the Irish Agrément Board.

Read our frequently asked questions about external wall insulation systems →

How does it work?

Insulation is fixed to the outside of the walls and a rendered finish is applied to weatherproof the exterior. A wide range of finishes can be applied in different colours and textures to give your property the right look. The use of EWI will dramatically reduce heat loss through the walls and can revitalise the appearance of your home.

Thermal imaging reveals heat loss of a house before and after EWI has been installed. Benefits include:

  • Thermal insulation keeps solid walls warm, condensation-free and protected from wind, rain and frost
  • System is fitted to meet individual house requirements with a choice of finishes
  • No loss of internal living space
  • Work can be carried out alongside other trades such as window replacement and re-roofing
  • As work is carried out to the outside walls, disruption to the household is minimised
  • A weatherproof, attractive and generally maintenance-free new exterior is provided as part of the thermal cladding of the building

An indicator of heat loss through a wall can be its U-Value, which you can read more about below.

U-Values explained

All construction materials are measured for how they conduct heat (Lambda value) and when various materials are used together, the overall thermal capacity of a wall is determined using a U-value – the lower the U-value, the more thermally-efficient the wall construction is.

U-values are calculated by taking into consideration the wall thickness and the materials it comprises of including render and insulation. A typical solid wall (9-inch brickwork) used in a Victorian property has a U-value of 2.1W/m2K, but after applying a webertherm EWI System, the thermal performance can be dramatically improved to achieve a U-value of 0.30W/m2K (the current target for building regulations in England) or below.

Read our frequently asked questions about our EWI systems →

Which system is for you?

webertherm XP

The webertherm XP system uses a specially-designed mineral one coat render which can be pumped by machine making application fast and economical. Labour and scaffolding costs are significantly reduced and the disruption to the homeowner is minimised.

The resulting finish is low maintenance and available in 23 popular colours, and can be finished with a number of textures and features. 

Learn more about webertherm XP

webertherm XM

webertherm XM is a lightweight, thin-coat polymer render system. This hand-applied system comprises of two layers of base coat render with a choice of decorative finishes.

webertherm XM can be finished in a wide range of over 160 colours across our decorative finish range.

Learn more about webertherm XM

Get in touch with one of our installers

We maintain an extensive network of installers across the UK and Ireland who attend extensive training programmes to become qualified Weber EWI installers. On top of this, we check their work on a regular basis to ensure compliance and the highest quality levels.

Get in touch with us now and we'll put you in contact with your nearest installer.

Click Compare to help you choose the right product for your project, if you need further assistance please email technical@netweber.co.uk