Frequently asked questions

What is External Wall Insulation?

External wall insulation (EWI) is a solid wall insulation material attached to the outside of a building and covered with a protective render. It is suitable for old or unconventional buildings that don't have cavity walls.

Does it need maintenance?

All of the systems are designed to be virtually maintenance-free and self-cleaning. As with good normal building maintenance, checks are required on movement joints, rainwater pipes etc and general building maintenance is advised to ensure the longevity and performance of the system.

How is it installed?

The system will be installed in a number of key stages. All the external fittings will be removed or redirected, the insulation slabs may have an adhesive and/or a mechanical fixing, followed by the applications of a render system to provide protection and a decorative finish. Upon completion, all external fittings are then repositioned.

How long will it take?

External Wall Insulation on average takes about 2-3 weeks from assembly to dismantle of the scaffolding. As with most building works the installation is weather dependent and this may create some delays.

Can I choose the finish?

A wide choice styles are available including a vast choice of colours, textures, pebble dash and real and simulated brick effect finishes. Colour cards and samples are available on request from your local Weber recommended installer.

Is there any mess?

Whilst work is ongoing on the property, disruption will be minimal. However as part of the installation process drilling and mixing machines will be in use whilst work progresses. Ongoing liaison with the installer will continue throughout the programme.

What do I need to do before work starts?

There is no need to vacate the house or even move the furniture, as all the work takes place outside, the installer will organise everything required including:

  • Climbing plants and shrubs will be removed from wall surface
  • Satellite dish will be removed from wall and fixed to scaffolding
  • Flues and overflow pipe will be extended to accommodate the insulation
  • Down / soil pipes will also be adjusted to suit
  • Walls will be brushed down to remove any loose debris

Do I need to be there whilst the work takes place?

You will not need to be present during the application of the EWI system, as all of the works are carried out to the external façade of the building and access to the inside of your property is not required.

Will it add value to my property?

Yes, EWI does not reduce the floor area of your home; it will renew and improve the appearance of outer walls, improves weatherproofing and sound resistance and increases the life of your walls by protecting the brickwork. The lower heating bills and increased comfort of an insulated property should also be appreciated by potential home buyers.

How much energy will I save?

For a typical 3 bedroom semi-detached house, you could save around £475 a year in heating bills, and 1.9 tonnes in CO2 emissions per year.

How much will it cost?

The cost of having External Wall Insulation or render only professionally installed onto your home is dependant upon the size and complexity of the property and type of insulation and finish required. We offer a free survey and quaotion survey, during this process we are happy to advise on other issues we commonly have experience of. 



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