Jenks sits right on the Arkansas River, and humidity is part of daily life here. Homes on crawl spaces, especially older houses near downtown and Main Street, feel it most. Vented crawl spaces pull moist summer air under the floor, where it condenses on ductwork and framing.
Over time that shows up as musty smells, sagging fiberglass, cupping wood floors and higher indoor humidity. In winter, cold air through the same vents leaves floors uncomfortable even with the heat on.
Closed-cell spray foam is the right tool because it does not absorb water and seals air as it insulates. We use it on rim joists, crawl space walls and under floors, and we offer full encapsulation when the crawl space needs it. Every job starts with a free inspection that includes a look at drainage around the house.
Jenks tip
Homes in low spots near the river should have grading and gutters checked first. Moving water away from the foundation is the most important step in keeping a crawl space dry.
Signs Your Crawl Space Needs Attention
- ✓Musty smells inside after heavy rain
- ✓Cold floors over the crawl space
- ✓Fallen or sagging fiberglass under the floor
- ✓Sweating ducts or pipes
- ✓Cupped or soft wood floors
- ✓Pests living under the house
Sealing the Crawl Space vs Insulating the Floor
A sealed crawl space has closed vents, a heavy ground liner and closed-cell foam on the rim joists and foundation walls, usually with a dehumidifier. It protects ducts and pipes and gives the biggest improvement in comfort and indoor air.
If the crawl space stays vented, closed-cell foam between the floor joists is far more durable than fiberglass batts because it will not sag or soak up water. Rim joist sealing alone is a smaller, affordable step that stops a major air leak.
Crawl Space Spray Foam Insulation Services We Offer
✓Rim Joist Sealing
Closed-cell foam at the band joist.
✓Foundation Wall Foam
Closed-cell foam on walls in a sealed crawl space.
✓Underfloor Spray Foam
Closed-cell foam between joists in vented crawl spaces.
✓Crawl Space Encapsulation
Liner, sealed vents and humidity control.
✓Old Insulation Removal
Removing wet or nest-filled fiberglass.
Crawl Space Spray Foam Insulation Cost in Jenks, OK
| Project | Typical Range | What Affects It |
|---|---|---|
| Rim joist sealing only | $600–$1,800 | Perimeter and access |
| Walls and rim joists, closed-cell about 2 in | $1,500–$3,500 | Wall height and clearance |
| Underfloor closed-cell, per 1,000 sq ft | $2,000–$6,000 | Joist layout |
| Full encapsulation with liner and dehumidifier | $5,000–$15,000 | Drainage and equipment |
Planning ranges. Your free estimate follows a crawl space inspection.
How It Works
- 1
Inspection
We check moisture, drainage, vents, ducts and pests.
- 2
Cleanup
Failed insulation and debris are removed.
- 3
Foam and Liner
Closed-cell foam and a liner go in as planned.
- 4
Final Check
Moisture readings are reviewed with you.