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How to tell if you can have Cavity Wall Insulation

16 July, 2015 EnergyLink inGeneral Comments (0)

Firstly, you need to be sure that you actually have cavity walls before checking whether they have been insulated.

If your property is built from stone or concrete, then it will not have cavity walls. If it is timber-framed or steel-framed, a cavity may be present but the walls will not be suitable for insulation under the ECO grant scheme...

If it was built from bricks after 1925, then it is likely to be cavity construction. A property built before 1925 may have a cavity but it will be too narrow to be insulated or it will have solid walls. You can check the brick pattern to establish the type of walls:

Brick Wall Types

Cavity walls will have no square brick-ends i.e. all the bricks lie horizontally and they will usually be at least 10 to 12 inches deep which is best measured in a door frame.

If your property was built after 1982, Building Regulations state that the walls must be insulated at the time of build. Therefore, if the property was built of brick between 1925 and 1982, it is likely to have cavity walls that can be insulated.

You can check whether a cavity has already been insulated by looking for drill marks. The most obvious place to see them is underneath the windows, normally 3 bricks down.

 Drill Marks

Not all properties are as obvious as the one above but if you look closely, you'll see the marks if the work has been done.

Another way to tell is by looking at the Energy Performance Certificate (EPC). If you don't have one, and you live in England or Wales, you can search the EPC Register. Under the summary of features, it will state what type of walls you have and whether they are likely to be insulated (main property is listed first, then extensions.)

If the EPC states that you have an un-insulated cavity, it will also normally display Cavity Wall Insulation as a recommended measure.

If you are not sure what type of walls you have or if they can be insulated, please continue to Apply and we will check for you.

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