Vapor barrier or full crawl space encapsulation?

A moisture management project involving a ground cover, air sealing and a designed drying approach, with other work depending on conditions.

No. Ground cover is one component. Ask what happens at walls, seams, vents, access doors and moisture control.

Not every home needs the same work. An inspection should explain what is happening in your crawl space and which options fit those conditions.

Water entry and water vapor are different problems. Ask which problem each quoted component addresses.

Check the quote. Framing repairs, foundation stabilization and moisture work should each have a clear description and price.

It may be an option, but the answer depends on where the moisture comes from and the condition of the space. Ask the inspector to explain why a ground cover would or would not be enough.

The leak needs its own repair. A barrier is not a plumbing repair.

Closing vents alone does not give you a complete moisture control system. Ask how the space will stay dry before agreeing to seal openings.

Thickness alone is an incomplete specification. Ask about the named product, reinforcement, seams, installation and warranty.

No. A mil is one thousandth of an inch; 20 mil is 0.508 millimeters, not 20 millimeters.

No. A drying approach and equipment capacity need to fit the space and conditions.

Floor area is only part of the picture. Ask how the equipment was sized for the volume of the space and how well it will be sealed.

No. Rated performance depends on test conditions; compare the conditions as well as the capacity number.

Ask for the condensate route and how drainage is kept working. Do not assume it can simply drain under the liner.

Ask the contractor to explain the proposed insulation location and the rules that apply to that design. A general online guide cannot settle that choice for your home.

Ask how future workers will reach plumbing and equipment, and how they can protect the liner while working.

Ask the contractor to identify the water source and explain how it will be managed before you agree to sealing work.

Drying air and controlling incoming liquid water are separate tasks. Ask how both are addressed.

They can be part of a wider drainage problem. Ask the inspector to look at where roof runoff goes as well as the conditions under the house.

A smell alone does not tell you its cause or identify a type of mold. Ask for an investigation of the odor and moisture source.

Sealing the space does not show that existing growth has been cleaned up. Ask what cleanup is proposed and how the moisture source will be addressed.

A photo can document a concern, but we cannot identify mold or diagnose your crawl space from it. Ask a qualified professional to assess the problem.

A moisture barrier is not structural repair. Ask a qualified professional to assess the floor and supports.

Ask what the inspector found, how it was assessed and why the suggested cleanup is needed. Get that explanation alongside the price.

Give the permit authority your property address and complete work description. Ask who will apply and which inspections are needed.

Check using the property address itself. The mailing address alone is not enough to settle which authority should answer your permit questions.

Ask the authority reviewing your project. Older interpretations and proposed code documents may not describe the rules that apply to your work.

Ask which trades will be involved, who will do that work and which credentials apply. A company website alone does not establish trade authorization.

Agree how inspection access will be retained and coordinate with the pest professional before installation.

Yes, changing treated soil can affect protection and contract coverage. Ask the pest company before that work.

North Carolina's radon program recommends testing all home types. A liner does not replace a test.

Do not assume every opening can be sealed. Ask the local floodplain authority whether required flood openings affect the proposed work.