concave joint

concave joint

A recessed masonry joint formed in mortar by the use of a curved steel jointing tool; because of its curved shape, it is very effective in resisting moisture. See also: Mortar joint

concave joint

concave joint
A recessed masonry joint, formed in mortar by the use of a curved steel jointing tool; because of its curved shape it is very effective in resisting rain penetration; used in areas subjected to heavy rains and high winds.
References in periodicals archive ?
Whatever is handy and has about the right radius to create a slightly concave joint will work.
Flat or concave joint surfaces are the best for horizontal paving.