Crawl Space Moisture Barriers

A solid, reliable, and code compliant crawl space vapor barrier is vital. In fact, the vapor barrier truly is the most important component of any crawl space, for the house to function as designed.

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A typical crawl space can release up to 20-25 gallons of water or more a day in the form of water vapor(every 700 square feet of earth has potential to evaporate 15plus gallons per day). A solid, reliable, and code compliant crawl space vapor barrier is vital. In fact, the vapor barrier truly is the most important component of any crawl space, for the house to function as designed. A vapor barrier is a variable material that covers the soil in your crawl space to help limit the amount of moisture that evaporates out of soil, prevent microbial growth, and protect the home.

Building codes only require a very thin (minimal) .06 mil plastic barrier and lots of air vents in the side of your house to vent moisture. While this sounds nice, it actually can have the reverse effect by letting moisture and cold winter air into your crawl space. A thin plastic or foil barrier, while inexpensive to install, does not protect against the damage caused by standing ground water, moisture from foundation walls, soil gases, mold, rodents and insects, and all the harmful effects that these have on your family and home. There are some upgraded approaches to vapor barrier protect for those that believe it takes more than the minimum to protect their major investments in family health and their homes.

Concrete for Crawl Spaces, a crawl space encapsulation system, will permanently seal out burrowing rodents, minimize or eliminate evaporating moisture, and provide a cleaner and healthier environment for family and home. Whether you are trying to lock out rodents, increase storage space, reduce energy bills, or just seal your crawl space soils the permanent way, crawl space encapsulation with Concrete for Crawl Spaces is the one time solution to your vapor barrier problems.

Perma Dry Waterproofing also offers our Clean ‘n’ Dry Liner system, a heavy gauge .20 mil polyurethane reinforced plastic liner installed to cover all foundation walls and floors. The seamless barrier will lock out moisture, mold, and prevent crawl space odors.

With our upgrade “conditioning” services, you can winterize your crawl space air vents by sealing out cold winter air and moisture. Code compliant .06 mil vapor barriers are only offered through our Crawl Space Drainage service and our Crawl Space Restoration service.

Additional services may include:

  • Crawl Space Drainage Services
  • Sump Pumps
  • Concrete for Crawl Spaces
  • Dehumidification and Ventilation

Request a free inspection from crawl space experts today!

Have A Wet Basement?

We have been providing common sense basement drainage systems since 1996 and we offer a full list of interior and exterior drainage solutions to meet your needs.

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If you have water in your basement, or your planning a remodel in your basement and want to avoid future moisture issues, the first step is to give us a call and speak with a basement water intrusion specialist.

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Schedule an inspection and estimate. After a inspecting the situation in your basement, we can offer several common sense solutions to your wet basement issues.

Schedule Your Repairs

Servicing Everett to Olympia, with some special trips to outlying areas, Perma Dry Waterproofing is a well-regarded drainage and water repair company with the demonstrated experience and knowledge to prove it.

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Satisfaction Guaranteed!

At Perma Dry Waterproofing, we take the time to assess the problem and determine the best way to solve it. As a result, what we make dry stays dry. In fact, we’re so confident in the quality of our work that we offer a written guarantee to back it up.

We had had our basement flood twice in a couple of years. Perma Dry found a poorly sealed crack in a foundation wall and repaired it beautifully. Even with huge rainstorms, we haven't had a drop of water. Highly recommended. Macall Gordon

We've had several very wet storm seasons since the installation three years ago, and the basement has remained bone dry, even while water covers large parts of our yard. We've doubled the usable space in our house. Scott Jarol

These folks were EXCELLENT. I mean "first class". Perma Dry delivered on their promises. I've had perfect and wonderful dryness. Nope, they didn't pay me to write this. I'm just a genuinely satisfied customer. John Austin

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Renton, WA 98057

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