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(Building) a wall that consists of two separate walls, joined by wall-ties, with an airspace between them
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|Noun||1.||cavity wall - a wall formed of two thicknesses of masonry with a space between them|
wall - an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure; "the south wall had a small window"; "the walls were covered with pictures"
n → Hohlwand f; cavity wall insulation → Schaumisolierung f