Chalk it up to the renovation mania spurred by home-improvement shows: Remodeling remains an unbridled pursuit, and homeowners are spending record amounts. But there may yet be a limit to all those rehabs and retrofits.

A review of that limit, and other renovation trends, comes courtesy of the Home Improvement Research Institute. The Indianapolis-based center, founded in 1981, bills itself as “the only nonprofit organization dedicated to home-improvement research.”

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