Crawl Space Encapsulation in Madison, AL

Crawl space encapsulation in Madison costs $5,500–$15,000 for a complete sealed system holding humidity below 55%. Tennessee Valley subsoil passes under an inch of water an hour, so the water route is solved before the crawl space is sealed.

What the builder put down, and what it is not

A great many Madison homes were built with a vented crawl space and a vapor barrier laid over the dirt, which sounds like the job is already done. In practice the builder-grade version is often a thin unreinforced sheet, loose-laid, overlapped but not sealed, and cut roughly around the piers. It satisfies the requirement it was installed to satisfy. It is not a sealed system.

The test is easy enough to run yourself with a flashlight. Look at whether the material is fastened or simply lying there, whether the seams are taped, whether it turns up the foundation wall or stops at the dirt, and whether it is intact around every pier. Those four observations tell you which product you own.

Check the warranty window while it is open

On newer Madison houses, moisture and grading are frequently covered items for a defined period, and a documented water path is exactly the evidence such a claim needs. Our inspection produces that document — humidity readings, wood moisture content, photographs of where water is being concentrated — whether or not we do the work.

If the warranty is still live, take it there first. See vapor barrier installation for what a proper liner involves and what it costs if the window has closed.

Asked in Madison

How much does crawl space encapsulation cost in Madison?

A complete sealed system runs $5,500-$15,000, and a reinforced vapor barrier alone runs $1,500-$4,000. On newer Madison homes the deciding question is usually whether water is entering, because that gets solved first. The inspection and the readings are free.

The builder already put plastic down. Do I need more?

Look at it before deciding. Builder-grade material is often thin, unreinforced, loose-laid, and cut roughly around piers, which is a different product from a sealed and fastened liner. If it is lying loose on the dirt and stops before the wall, it is a ground cover rather than a vapor control layer.

Is this covered by my builder warranty?

Sometimes, on a house young enough. Moisture and grading are commonly covered items for a defined period. A claim needs documentation, and our inspection produces it - humidity readings, wood moisture content, and photographs of where water concentrates - whether or not we do the work.

What a Madison crawl space inspection includes

We go under the house. Relative humidity and temperature readings, wood moisture content at the joists, girders, and sill, clearance measured at several points, photographs of anything worth seeing, and an exterior walk of where water goes. You keep the numbers whether or not you hire us.