Crawl Space Insulation

Each space is different, and your crawl space is an odd combination of factors. Using different types of insulation in conjunction with others may be required but most of the time closed-cell spray foam applied to the exterior walls of the crawl space is your best option. Your Bauer Specialty professional will assess the area and discuss the different options with you.

Many times people want to insulate the underside of the floor above a crawlspace. This may make sense if the space is not connected to a basement area and contains no plumbing or HVAC duct work. You’ll need to figure the best method to protect the crawl space from moisture and sub-freezing temperatures. Wrapping plumbing or ducts in insulation could make a problem worse because by doing so they are now insulated from warmth as well and could be more prone to extreme cold. Moisture sources are also a major concern. A crawlspace with a dirt floor can allow huge amounts of moisture to enter the space from the earth. This is moisture in vapor form. The problem is even worse if ground water from poor exterior drainage or improperly located downspouts is able to enter. 

Closed-cell spray foam is impervious to water and acts as a vapor barrier at thicknesses of two inches or more. This when combined with a vapor barrier such as heavy weight plastic helps to create an envelope around the crawlspace that keeps out moisture. Should additional dehumidification be required you now have a controlled environment to work with and the energy to keep humiditiy levels in check will be much less. Vented crawlspaces that rely on passive venting have been show to cause issues becuase they allow humid summer air to enter a cool crawl space. This leads to mold growth and further damage as years pass. (Study on Vented vs. Sealed Crawl Spaces)

Without proper insulation, your crawl space will become home to mold, mildew, fungus, and pests. The spore and allergens from these things can work their way into your home through your vents and unsealed floorboards, causing poor indoor air quality and health hazards. 

Some areas still require ventilation while others do not. It depends on your specific home structure, the local code and environment, and what the local climate looks like through the year. However, problems caused by ventilation and the incorrect installation of insulation is one of the most common calls for repair. Skip the extra expense down the road. Instead, call Bauer Specialty and get a game plan ready for your insulation. Our experts are eager to get your home warm and comfortable for you and your family.