A valley between the slopes of two adjoining roofs, in which the end tile of each row abuts against a tile one and a half times its width laid diagonally on the valley board.
Origin
1920s.
Definition of laced valley in US English:
laced valley
noun
Building
A valley between the slopes of two adjoining roofs, in which the end tile of each row abuts against a tile one and a half times its width laid diagonally on the valley board.