When Is A Crack Both Serious and Negligible?

by Don Friedman on June 17, 2016

In our previous discussions of cracks, we neglected a rare but weird category: cracks that look terrible because they really do affect structure, but are completely unchanging.

IMG_1481

That crack monitor has been there, to the best of knowledge, for a little over fifteen years. Since it was installed, there has been effectively zero movement. The crack is roughly 1/4 inch wide at the base of the (solid masonry, bearing) wall, tapering to zero about eight feet above grade, but whatever forces caused it have apparently been still since the last century.

I left the crack monitor in place, of course. Eventually, it will be old enough for landmarks designation.

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