Crawl Space Encapsulation in Harrison, TN

Harrison wraps around Harrison Bay on Chickamauga Lake, which is exactly why so many crawl spaces here fight a losing battle with moisture. Lakefront and near-lake homes sit in some of the most humid air in Hamilton County, and a vented crawl space pulls that air straight in. Whether your place is a lake house or a subdivision home a few minutes inland, the dampness underneath is the same problem — and sealing it, with no dehumidifier, is the same fix.

 LAKE AIR GETS IN

Why Harrison homes need Crawl Space Encapsulation

Warm, moisture-heavy air off the bay enters through the foundation vents and condenses on the cooler dirt and framing under your floor — the sweet-tea-glass effect, all summer long. That moisture feeds mold, rots joists, and soaks any fiberglass stapled under the floor until it sags and falls. Then the stack effect pulls the damp, musty air up into the house, so the crawl space ends up setting the air quality upstairs. A loose plastic sheet on the dirt does nothing to stop any of it — near this much water, the space has to be genuinely sealed.

HOUSES AND LAKE BUILDINGS

Homes, shops, lake buildings — both need sealing

Lake house or inland subdivision, old or new, the humidity treats every Harrison crawl space the same — and our system handles all of them. We seal the walls and rim joists with closed-cell spray foam, sealing and insulating the perimeter in one step; we lay a heavy 15–20 mil reinforced ground barrier, sealed and overlapped so water drains back to the ground instead of into the open; and we seal the vents where mechanicals allow so the crawl space joins your conditioned envelope. Where the water table runs high near the lake, we add a sump pump. The result is a dry, conditioned crawl space, warm floors, and cleaner air upstairs — without a dehumidifier on the meter.

By applying spray foam directly to the underside of the roof deck, it now insulates the attic space from the extreme heat that once radiated through the hot shingles sheathing and roof. The severe temperatures no longer exist in the attic. In short, the attic now becomes a passively "conditioned" space of the house that is just as comfortable as any other room in the home.

Benefits

A roof system insulated with Foametix spray foam reduces energy several ways. Energy loss from ducts located in the attic is essentially eliminated. The top of the building is much tighter resulting in less infiltration and exfiltration, so excess moisture isn't pulled into the attic. Infiltration through the ceiling is also reduced. In addition, the attic temperature is remarkably lower, which further reduces energy loads.

Energy Savings

  • Why don't you install a dehumidifier when other companies do?

    Because we actually seal the crawl space. We line the walls and rim joists with closed-cell spray foam — it's the insulation and the moisture-and-air barrier in one. Most companies don't run closed-cell foam, so they can't fully seal the space; they drop in a dehumidifier to manage the moisture they can't keep out. That's a bigger bill up front and an appliance running on your power for years. We're one of the only crews in the Chattanooga area that truly seals it, so it stays dry on its own — no dehumidifier.

  • Is this more or less expensive than a dehumidifier system?

    Less, once you look past day one. Ours is a one-time seal with nothing to run — no dehumidifier on the power bill, no filters, no unit to replace in eight or ten years. Systems built around a dehumidifier usually cost more overall once you add the equipment, the electricity, and the upkeep.

  • My home is on the lake — does that change the job?

    Mainly that there's more moisture, and often a higher water table near the bay. We seal it the same way, and where groundwater's a factor we add a sump pump so the system handles real water, not just humid lake air.


  • Will it lower my energy bills?

    Yes. A sealed, conditioned crawl space stops your heated and cooled air from leaking into the ground and eases the load on your HVAC — which shows up on the power bill.

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