A form of Flemish bond in which the bricks are laid on edge and the headers span the whole thickness of wall, dividing the wall cavity into square spaces.
Origin
1930s.
Definition of rat-trap bond in US English:
rat-trap bond
noun
Bricklaying
A form of Flemish bond in which the bricks are laid on edge and the headers span the whole thickness of wall, dividing the wall cavity into square spaces.