cavity wall

American  

noun

Masonry.

1. a wall built with an enclosed inner space to prevent penetration by water.

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cavity wall British  

noun

1. a wall that consists of two separate walls, joined by wall-ties, with an airspace between them

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Etymology

Origin of cavity wall

First recorded in 1905–10

Example Sentences

FirstPort says the problem was caused by faulty cavity wall insulation installed by British Gas 11 years ago.

From BBC

The council said people could get advice on schemes available to help with heating costs ahead of autumn and winter, while eligible households can also get help with loft and cavity wall insulation.

From BBC

Exactly the same kind of beads that are sometimes used to insulate cavity walls in buildings, he explains.

From BBC

Changes to the rules mean homes are no longer required to have existing loft or cavity wall insulation, which could save around £2,500 of upfront costs.

From BBC

Costs and savings vary considerably, but a typical installation of cavity wall insulation in a mid-terrace house would cost about £390, with annual energy savings of £95.

From BBC