Published 2026-10-07 · By Mark Crawford, Owner

Crawl Space Vapor Barrier Cost in Tulsa: What Homeowners Should Budget

Typical Cost

A crawl space vapor barrier in the Tulsa area usually costs about $1.00 to $2.50 per square foot of crawl space floor. For a typical 1,200 sq ft crawl space, that is about $1,500 to $3,000. Thin 6 to 10 mil plastic laid on the floor is at the low end; 12 to 20 mil reinforced liner run up the walls and around piers is at the high end.

What Affects the Price

• Liner thickness and reinforcement
• Whether the barrier runs up the walls
• Number of piers to wrap and seal
• Clearance height and access
• Old plastic and debris to remove
• Standing water or mold to fix first

Liner Thickness Explained

Six mil polyethylene is the minimum the building code accepts as a vapor retarder, and it is inexpensive. It also tears easily when anyone crawls over it. Ten and twelve mil reinforced liners hold up well in most crawl spaces. Fifteen and twenty mil liners are heavier, more puncture resistant and standard for encapsulation. If anyone will service plumbing or HVAC in your crawl space, the thicker liner is usually worth the difference.

Vapor Barrier vs Encapsulation

A vapor barrier covers the soil and stops ground moisture. It does not stop humid outdoor air coming through open vents, which is a real issue in Tulsa from June through September. If your crawl space stays above 60 percent humidity in summer, has sweating ducts or mold, you will likely need full encapsulation, which typically runs $3.50 to $7.50 per square foot. If the space is fairly dry and the soil is just uncovered, a barrier alone is a sensible budget choice.

Budgeting Tips

Get the outside right first: gutters, downspouts and grading. Ask quotes to list liner thickness, seam treatment and wall coverage. If you plan to encapsulate later, install a liner that can be extended up the walls and sealed, so you are not paying twice. See our vapor barrier installation page for details.