“ Most walls in older houses are solid, of a single ‘leaf’. A cavity wall is a wall of two leaves with an air gap between them. This construction was used as early as 1800, often to economise on materials. It was first used in London in 1880 and by 1900 was becoming fairly common in small houses. By the 1920s it was in widespread use.
Bricks & Brass: External Walls
Judely's Jottings
Serendipitous bits and pieces from a middle aged music addict with a butterfly mind...
http://www.myspace.com/jude_ly
My Music - click on this to visit my Last profile page.
