Cavity Wall insulation

Cavity Wall Insulation

Is my home suitable for Cavity Wall Insulation?
wall

The majority of homes built after the 1920s have cavity walls. You can get an indication to whether or not your home has a cavity by looking at the brick pattern on the front of your external walls.

Cavity – Likely

If all the bricks are roughly the same size and evenly spaced out, then it is likely that your property has a cavity.

Cavity – Unlikely

If all the bricks are randomly spaced out and are different sizes, it is unlikely that your home has cavity walls.

What if my home is not suitable?

Typically, mineral wool can only be installed in cavity walls with an even width, in properties that are mainly constructed from brick. If you live in a stone house or if your cavity is jagged and uneven, you still may be able to get your wall insulated with spray foam insulation (Technitherm).

Alternatively, if your house dose not have a cavity, you could consider external solid wall insulation.

Cavity Wall Insulation (Wool) FAQs

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A series of small holes are drilled in the external walls of a suitable property then mineral wool is pumped into the cavity. The holes are resealed, the walls are washed down and any excess dust is cleared away.

If we are using grant funding to support the cost of your installation then at least 50% of your property will need to be insulated for any work to go ahead. Unfortunately, we are unable to insulate single walls or garages due to funding restrictions.

Typically an installation will take about 3 – 4 hours for a standard semi detached property. Installation appointments are usually carried out within 3 weeks of an approved technical survey.

Our experienced surveyors will carry out a series of safety checks at your home. We will need to drill a hole inside one of your external walls and use a borescope (a devise that lets you view and measure a cavity) to determine whether or not your home is technically suitable for the work.

A cavity needs to be roughly 50mm wide in order for it to be filled. Only homes with even cavities that are typically constructed from brick are suitable for mineral wool insulation. There are other insulation materials available for different property types such as spray foam insulation (Technitherm) and external solid wall insulation.

What is Technitherm Cavity Wall Insulation?

Technitherm is designed for non-standard cavity walls and consists of two components which when combined produce an adaptable but durable foam material which is then pumped into a cavity. The foam fills all nooks and crannies, then sets selling the cavity and strengthening the wall construction.Technitherm insulation can be used in narrow cavities, variable width cavities and standard cavities.

It is also compatible with any of the following hard to treat property types (subject to survey):

  • Brick
  • Random Stone
  • Coursed Stone
  • Properties with failing wall ties
  • Houses with no damp proof courses
  • Narrow cavities down to 25mm

Typically an installation will take about 3 – 4 hours for a standard semi detached property. Installation appointments are usually carried out within 3 weeks of an approved technical survey.

Our experienced surveyors will carry out a series of safety checks at your home. We will need to drill a hole inside one of your external walls and use a borescope (a devise that lets you view and measure a cavity) to determine whether or not your home is technically suitable for the work.

A cavity needs to be roughly 50mm wide in order for it to be filled. Only homes with even cavities that are typically constructed from brick are suitable for mineral wool insulation. There are other insulation materials available for different property types such as spray foam insulation (Technitherm) and external solid wall insulation.

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