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# Long description

This diagram shows the difference between a solid brick and a cavity wall. Drawing ‘a’ at the left shows a solid brick wall. It shows that some bricks labelled ‘stretchers’ are laid parallel to the direction of the wall. Other bricks labelled ‘headers’ run right through the wall. Diagram (b) at the right shows a cavity wall. It has two skins or layers. All of the bricks are laid running parallel to the direction of the wall. They are labelled ‘all stretchers’. There is a labelled ‘brick cavity’ between the two skins.