Crawl Space Encapsulation in McEwen, TN

In August 2021 the flooding along Trace Creek hit McEwen and Waverly harder than anywhere else in the county. Homes and businesses were destroyed by floodwaters in both towns. McEwen is where the state rainfall record was set that same morning. Even houses that were never touched directly by the flood spent that season sitting above saturated ground, and plenty of crawl spaces in town took on water that was never properly dealt with afterwards.

That event changed what we expect to find when we open a crawl space hatch in McEwen. In homes near the creek and its low ground, we look for the signature first: a tide line on the piers, silt deposits on the old ground cover, insulation that was soaked and never replaced, and wood that took on moisture and started to soften.

The rest of the housing stock has the more ordinary Humphreys County problem. McEwen has around 1,600 people and a lot of its homes were built in the decades when a crawl space meant bare earth and open vents. In a Tennessee summer they load it with humid air instead, and that air condenses on every cool surface under the floor. Fibreglass batts absorb the moisture, get heavy, and drop out of the joists onto the ground.

The county's geography keeps the cycle going. This is creek and bottomland country, the same Western Highland Rim terrain that made the 2021 flood so severe. Ground here does not dry quickly.

Drainage and sump first, where needed. If water still finds its way into the crawl space during wet weather, that gets solved before anything else. Interior drainage along the footing and a sump pump move the water out. On lots near Trace Creek or in its old flood path we assume we need to check for this, not the other way round.

The liner. A heavy reinforced liner goes over the entire floor and up the foundation walls, with every seam overlapped and taped and every pier wrapped and sealed.

Vents and rim sealed. The foundation vents get closed and sealed permanently. The rim joist, which leaks air in nearly every house we inspect, gets sealed and insulated, most often with closed-cell spray foam.

Dehumidification or conditioning. A sealed crawl space still needs its air managed. We either fit a dedicated dehumidifier sized to the space or supply conditioned air from the house system.

• Any crawl space that took water in 2021. If the space flooded and was never remediated, there is a strong chance the damage is still down there. Have it looked at.
• Homes along the Trace Creek low ground. High water table, slow drying soil, and a real flood history. These houses need drainage plus a liner, not a liner alone.
• Houses with fallen or missing floor insulation. Damp fibreglass drops. Once it is on the ground the floor above is uninsulated and the wood is exposed.
• Musty smells on the ground floor. Roughly speaking, the air in your rooms is drawn partly from the crawl space. A damp crawl space smells like a damp crawl space, indoors.
• Older vented crawl spaces anywhere in town. The vented design fails in this climate regardless of flood history.

The other failure is treating every crawl space as identical. A space with an active water problem needs drainage before liner. A space with post-flood silt needs cleaning first. We inspect, tell you which one you have, and write the scope to match.

Read more about our crawl space encapsulation work, our residential spray foam service, or the full service area.