Contraction joints, in effect, are deliberately made weakness planes. They are formed in the expectation that if a crack occurs it will be along the neat geometric pattern of a joint, and thus irregular, unsightly cracking will be prevented.
Contraction joints, in effect, are deliberately made weakness planes. They are formed in the expectation that if a crack occurs it will be along the neat geometric pattern of a joint, and thus irregular, unsightly cracking will be prevented.