Crawl Spaces in Maryville's Older Homes, Era by Era

Maryville's median home was built in 1985, and 44.3% of its 12,901 homes predate 1980 (U.S. Census). Older crawl spaces here most often have missing or torn ground covers, open vents, slumped insulation and joists softened by humid summers, so they deserve a check before a sale or a remodel.

How old is Maryville's housing?

Of Maryville's 12,901 homes, 5,717, or 44.3%, were built before 1980, and the median year built is 1985 (U.S. Census). About 73.3% are single-family detached houses, and 67.5% of occupied homes are lived in by their owners. That's a lot of houses with a crawl space that may have gone decades without much attention.

College Hill and the historic core

Maryville protects its historic homes in the College Hill Historic District near Maryville College, which takes in the Indiana Avenue Historic District listed on the National Register. Houses of that vintage commonly sit on brick or stone piers and foundation walls rather than poured concrete, with ground that was never covered at all. Old masonry wicks moisture, and mortar joints can crumble. A liner in a home like this is fitted around irregular piers and fastened to walls that may need repair first.

What to check, by era

• Before about 1950: masonry piers, uneven soil, notched joists, old wiring and plumbing strapped under the floor.
• 1950 to 1979: thin or missing plastic, open vents, fiberglass batts sagging out of the bays, galvanized pipe.
• 1980 and later: ductwork and plumbing through the crawl, builder-grade ground cover, condensation on supply ducts in July and August.

Soft or bouncing floors point to sagging floor and joist repair; torn plastic points to vapor barrier replacement.

Radon in older Blount County homes

Blount County is EPA Radon Zone 1, with a predicted average indoor screening level above 4 pCi/L (EPA). Older homes with bare soil in the crawl have nothing slowing soil gas on its way up. Test before sealing and again after. If you're weighing the whole job, the Maryville crawl space encapsulation cost page lists every range.