The Thin Grey Line

Seldom are architectural alterations or improvements comprehensively chronicled. Building and safety permits may document some changes, but mostly the house archaeologist is forced to analyze style clues and discontinuities.

Concrete may be the great exception amongst materials. Driveways, pads, and patios, steps, curbs and porches, even foundations sometimes feature elucidating inscriptions. Many are likely the work of untamed youth, but other imprints are clearly for the record, almost formal.

Because projects are often conjunctive, these inscriptions can help pinpoint other ventures. A backyard pad, for example, might coincide with the installation of french doors. A "wet patch," or a section of concrete repair, might accompany plumbing work. A garage needs a driveway.