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Air Sealing Your Crawl Space

Crawl space insulation is often overlooked and most homeowners don't even think about insulating their crawl space until a problem occurs.

Many of the common problems associated with a home's energy loss come from these dark & dingy areas beneath their home. 

Inadequate or improperly installed insulation in your crawl space can lead to higher energy bills, mold growth and moisture problems.

On the other hand a properly sealed & insulated crawl space can reduce your heating and cooling costs and make your home more comfortable in any season. In fact, when your insulation job is done right, the crawl space air will become part of the conditioned area of your home. This will help prevent mold growth, moisture damage and a potentially costly repair bill in the future.

Building science technology has changed significantly over the past decade. Vented crawl spaces & fiberglass insulation under the floor were common place just a few years ago but those practices have since been replaced with foam sealed crawl spaces using more moisture resistant insulation products. In the old days, the common building practice was to only insulate the floor above the crawl space and to leave the crawl space’s foundation walls vented and uninsulated. This was a monumental design flaw, as it turned out. Instead of expelling moisture, the vented foundations actually allowed more moisture & humidity into the home. Once that warm, humid outside air, passes over the cool surfaces of the crawl space, condensation is generated. This can lead to moisture problems, mold growth and rot. In fact, vented crawl spaces are one of the leading causes of home energy loss and have resulted in millions of dollars in preventable home repairs throughout the US.

Fiberglass insulation doesn't respond well to moisture. In fact its soft, cotton  like consistency absorbs moisture, gets soggy and compresses over time. While fiberglass insulation is more affordable then other insulation materials, the initial cost savings is completely negated when the material used fails, or gets moldy and you have to re insulate the entire space.

Your goal should be to make the crawl space a part of the conditioned space of your home. This means that temperature & humidity levels should be closer to that of the rest of the house. You want to air seal your exterior walls with spray foam or rigid non permeable  insulation. You want to fill all of the gaps with expanding foam to prevent air leakage and for added protection you want to encapsulate your crawl space with at least a 10 mil encapsulation liner.

Our  trained team of efficiency professionals will help eliminate the moisture problems in your crawl space. 

• Help eliminate sources of water in the crawl space.
• Insulate the exterior foundation walls, not the sub-floor
• Use an insulation that resists damage from water (not fiberglass or cellulose).
• Air seal all vent openings in the foundation
• Ensure that the access hatch is sealed ( when applicable ) 
• Air seal the rim joists and sills
• Install an air and vapor barrier over the floor and seal it with spray foam adhesive 

Our company offers a 100% free, no hassle, in-home consultation. We will evaluate your current needs and make common sense recommendations to make your home more energy efficient, healthy and comfortable 

To get started give us a call or schedule your free in-home consultation today!