A cavity wall is a wall that consists of two separate walls with a space between them. Cavity walls help to keep out noise and cold.
[mainly British]
...cavity wall insulation.
cavity wall in British English
noun
a wall that consists of two separate walls, joined by wall-ties, with an airspace between them
Examples of 'cavity wall' in a sentence
cavity wall
New figures on cavity wall insulation do not bode well.
Times, Sunday Times (2013)
Many people can benefit from free loft and cavity wall insulation.
The Sun (2012)
Free cavity wall or loft insulation is possible.
The Sun (2011)
Check your loft and cavity wall insulation and make sure all your pipes are properly lagged.
The Sun (2008)
What exactly is cavity wall insulation?
Times, Sunday Times (2010)
In my own home I have cavity wall insulation.
Times, Sunday Times (2007)
Nor will most homes built before the 1930s, which are unsuitable for cavity wall insulation.
Times, Sunday Times (2008)
She checked our existing loft insulation, which was to a good standard, and explained how we would benefit from cavity wall insulation.
The Sun (2015)
Homeowners can look to their energy suppliers for help with improvements: for example, your electricity supplier can help to subsidise cavity wall insulation.
Times, Sunday Times (2008)
From next year, it is likely that most people wanting loft or cavity wall insulation will need to pay around 1,000 to get it done.
The Sun (2012)
After a period in his twenties doing any work he could find, such as cavity wall insulation, he became a drummer in a rock band.
Times, Sunday Times (2010)
I LIVE in a house which has double glazing and very good loft and cavity wall insulation.