Crawl space encapsulation vs. crawl space reconditioning: are they different jobs?

What encapsulation means

A crawl space encapsulation turns the space under the house into part of the house instead of part of the outdoors. A heavy reinforced liner goes across the whole floor and up the foundation walls, the seams are sealed, the piers are wrapped, the vents are closed, and a commercial-grade dehumidifier, sized to the space and plumbed to drain, holds the humidity below the level mold needs.

If the space takes on water, drainage and a sump go in first. If there is mold, it is treated first. A liner over standing water is a pond with a lid.

What reconditioning means

Crawl space reconditioning is the full reset of a crawl space. In practice it means removing everything the moisture has ruined (insulation, old plastic, debris, sometimes ductwork), treating mold, fixing the water with drainage and a sump if it is present, putting in a new vapor barrier or a full encapsulation, insulating correctly, and repairing joists, subfloor and supports the water has weakened.

So which one do you need?

On our jobs they are the same work: the crawl space is cleaned out, made dry and sealed. We use both words because homeowners search for both, and because some crawl spaces need more cleanout and repair than others before they are sealed. Your written estimate lists exactly what is included for your house, line by line.

What matters is not the name but whether the estimate fixes every reason the space went bad:

• Water. Standing water or mud after rain needs crawl space waterproofing before anything is sealed.
• Mold. Growth on the joists or subfloor is treated, by an IICRC-certified company, before the liner goes in.
• Ruined material. Soaked insulation and torn plastic come out. Wet insulation holds water against the wood.
• The seal. Liner on the floor and the walls, seams sealed, piers wrapped, vents closed.
• The air. A dehumidifier sized to the space and drained properly, not a bucket.
• The wood. Soft joists and sagging floors repaired so the floor above is solid again.

Where a vapor barrier fits

A vapor barrier on its own is a liner over the floor. It is the right answer for a dry crawl space that only needs the ground vapor stopped, and we will tell you when that is all you need. The encapsulation vs. vapor barrier guide explains the difference.

How to read an estimate that uses either word

Ask the company to show you, in writing, whether the water, the mold, the ruined insulation, the seal, the dehumidifier and any wood repairs are included, and what liner goes in. Our liner comes in 10, 12 or 20 mil. Ask whether the warranty is in writing and whether it transfers when you sell. Ours is a lifetime transferable warranty on our work, written out to the address.