Is a Vapor Barrier Necessary for Your Home?

< Back to Blog

Is a Vapor Barrier Necessary for Your Home?

Is a Vapor Barrier Necessary for Your Home?
Sep 04, 2019

Let’s imagine a house without a vapor barrier installed for the protection of its walls. It’s nice and dry at first, and stays so for a few months. But then you have the start of the hot season, and humidity levels fluctuate. In a couple of months, you notice the warmth and dry comfort vanishing from your house. Instead, it now feels damp and cold all the time.

The reason for this is the moisture (in the form of water vapor) that has accumulated inside your walls.

From your crawl space to the walls, nothing is a vacuum. There’s ductwork involved, plumbing, and exposed frameworks which are all vulnerable to moisture. This moisture could come from the soil underneath or from the walls where it’s been accumulating.

So if you’ve been having second thoughts regarding whether or not you should get a vapor barrier, here’s a list to remind you why buying one is in your best interests.

Keeps the Moisture in Check

 Moisture Check

Moisture belongs in the soil—and should be kept therein. This is specifically significant in areas such as Seattle, where the maritime moisture can become a real problem for homes, and especially the older ones. You need a vapor barrier to protect your house from potential damage effectively. Briefly put, the moisture stays in the soil where it belongs, whereas your house stays dry.

Keeps Rust Away

The structure of your house has metal incorporated within, and there’s only one result to expect when water meets metal: it’s rust. And rust is bad for your house. This is specifically concerning if there’s an HVAC system installed. Even if the metal used is stainless and galvanized, you can never be sure that you’re entirely safe.

Keeps the Wiring Away

If you thought water and metal were bad, imagine a combination of water, metal and electricity. A wiring hazard is simply waiting to happen. Joints mean that there are additional entry points for vapor, and once these get in, the wiring’s in trouble. Additionally, an animal that made its way under the house can also cause a loose conduit connector. Vapor barriers reduce the chances of this happening.

Keeps the House Dry

And last but not the least, vapor barriers keep the house nice and dry, free from odd smells, mildew, and mold. You can rest assured that the house won’t be causing anyone any allergies, respiratory tract infections, or other health complications anytime soon.

Ready to Buy a Vapor Barrier?

Crawl Space Door Store has a range of essential and functional products to offer, ranging from air vents and crawl space doors to the vapor barriers you’ve been after. Place an order online with us and have all your house foundation worries put to rest!



  • Better Business Bureau Accredited Business
  • International Code Council Member
  • Tidewater Builders Association Member
  • Tidewater Builders Association Green Council Member

Why buy a crawl space door, flood vent,
air vent, or portable fan system?

  • Save Money

    Save Money

    Save money on your utility bill with our ventilation, door, fan and vent cover products. You can save money on your flood insurance premiums with our FEMA compliant flood vent.

  • Protect Your Home

    Protect Your Home

    Moisture in the crawl space rots the wood under your home. Reduce the moisture in your crawl space with our crawl space doors, louvers, flood vents and portable exhaust fans.

  • Protect Your Family

    Protect Your Family

    A damp crawl space is unhealthy. Mold thrives in damp areas causing millions of airborne mold spores to enter your home. Toxic mold spores can be deadly to children and those with allergies and COPD.

  • Save Energy

    Save Energy

    Use our crawl space air vents and doors to ventilate your crawl space with natural air flow or forced air with our energy efficient exhaust and portable fans.

  • Save The Environment

    Save The Environment

    Reducing the moisture in your crawl space reduces mold that releases airborne mold spores into the environment.

  • Green Crawl Space

    Green Crawl Space

    Ventilate your crawl space with natural air flow with our crawl space air vents, louvers, and exhaust fans.

Check out our crawl space videos