Why the Air in Your Crawl Space Matters More Than Most Homeowners Realize
Most homeowners hardly give their crawl space much thought at all. They know it’s there, but maybe aren’t sure about how important it really is and how it can directly impact the air quality in the rest of the home. In fact, roughly 40% of the air in your home comes from the crawl space. Because of this connection, problems in your crawl space can have a direct impact on your home’s indoor air quality.
If you’re noticing musty smells, more allergy symptoms, or higher humidity in your home it may be caused by a problem in your crawl space. To schedule a free inspection, contact Summit Environmental Solutions at (703) 520-5868 or fill out our contact form today.
How Air From Your Crawl Space Enters Your Home
The Stack Effect Pulls Air Up Through the House
Warm air rises toward the upper parts of the house, creating a slight vacuum in the lower levels. This is called the stack effect. The difference in pressure causes air to be pulled up from the crawl space toward the first floor and the rest of the house. If the air quality in the crawl space is poor, then that same air will be pulled up to the living spaces. Contaminants such as mold spores, allergens, dust, and excess moisture are brought up along with the air.
Air Moves Through Floor Gaps, Ductwork, and Utility Openings
The crawl space isn’t disconnected from the rest of the house. It’s connected through small openings between areas like gaps around plumbing, leaks in the ductwork, and floor gaps. Those pathways, even though they are small, allow the crawl space air to mix with the air in the living spaces.
Common Crawl Space Problems That Affect Indoor Air Quality
Issues in your crawl space aren’t just isolated to that area. They can spread throughout the house if left unchecked.
Excess Moisture and Humidity
High humidity can lead to a variety of air quality issues. Increased mold growth, dust mites, bacteria, and chemical pollutants are all directly associated with more moisture in the air. That’s why it’s key to keep humidity between 30% and 50% according to the EPA.
Mold and Mildew Growth
The combination of high humidity and limited airflow is the perfect recipe for mold and mildew growth in your crawl space. Leaks, poor drainage, groundwater seepage, or plumbing issues can accelerate the growth of mold and mildew. It only takes a day or two for mold to begin growing on damp materials. Because of the stack effect, mold spores from your crawl space can enter the living areas in your home, negatively affecting the air quality.
Pest Activity in the Crawl Space
High moisture levels typically mean increased pest activity. Termites, spiders, ants, crickets, and even mice and rats all are commonly found in crawl spaces. A large pest population in your crawl space can attract larger animals like snakes or raccoons. Their droppings and the damage they cause will impact the air quality in the crawl space and then the rest of your home. Left unchecked, these problems can quickly snowball.
Damp or Damaged Insulation
Damaged insulation can actually do more harm than good. If it becomes saturated or damaged, it may end up holding water like a sponge, dramatically increasing the humidity levels. If insulation tears due to pests or deteriorates over time, it can trap dust, debris, and other contaminants that will negatively affect the air quality in your home.
Signs Your Crawl Space May Be Affecting the Air Inside Your Home
How do you know if you have air quality issues in your crawl space? These issues can directly affect crawl space air quality and eventually the air inside your home.
Musty Smells Inside the House
You’ve checked everywhere and still can’t identify where the musty smell is coming from. Musty odors are often an indicator of mold or mildew, and the crawl space is one of the most common sources. High humidity from ground vapor, water intrusion, condensation, or poor ventilation creates damp surfaces that encourage mold and mildew growth.
Allergy Symptoms
Are you experiencing more allergy symptoms than normal, even inside your home? Sometimes the answer is right under your nose. Poor insulation, high humidity, and pests in the crawl space can worsen allergy symptoms even if you never set foot in there. That poor air quality is pulled upward and circulates through the remainder of the home. Dust and debris, rodent droppings, bacteria, and mold spores can all contribute to the sniffling you may be experiencing.
Floors That Feel Damp or Cold
If your floors feel damp or unusually cold, that can be a warning sign that something isn’t right in the crawl space. Damp, clammy, or slightly sticky floors could signal moisture buildup or poor insulation. This is typically one of the first signs that something in your crawl space requires some attention.
High Indoor Humidity
Soil naturally releases moisture into the air. In crawl spaces without proper moisture control, the water vapor builds up and increases the humidity. It’s possible that the increased humidity in your home starts with your crawl space.
How Crawl Space Encapsulation Helps Improve Indoor Air Quality
Sealing Out Ground Moisture
Crawl space encapsulation offers many benefits to the air quality of your home. In an open or unsealed crawl space, the water vapor coming from the soil can lead to moisture buildups and contribute to higher humidity and mold growth. Sealing out the ground moisture by installing a vapor barrier across the floor of the crawl space will help prevent that buildup. Expert technicians will apply a thick plastic liner to cover the soil, walls, and support piers to fully seal the crawl space from moisture.
Controlling Humidity Levels
Encapsulated crawl spaces limit the amount of outside air from entering through vents and gaps. When a space is sealed, humidity fluctuations caused by changes in weather are greatly reduced. Many encapsulated crawl spaces will also include dehumidifiers or controlled air systems to further help regulate the moisture in the air. Lowering and stabilizing the humidity levels in your crawl space will not only make the air in your living space more comfortable, but it can also help reduce allergens and other triggers for respiratory irritation.
Protecting Insulation and Structural Materials
The wood framing such as floor joists, beams, and subfloors can absorb the excess moisture produced by the soil beneath your crawl space. When damp, the wood is a perfect spot for mold and mildew growth which will negatively impact the air quality in your home. The insulation in your crawl space is supposed to help regulate temperatures and humidity, but when it becomes damaged or saturated, it can end up doing the opposite. Encapsulation helps keep both the structural materials and the insulation in your crawl space dry and protected from contamination. A dry, sealed crawl space will increase the air quality not only below your house, but throughout the other floors as well.
Why Crawl Space Inspections Are Important
Some homeowners go years without getting their crawl space inspected, but regular inspections are essential for maintaining a comfortable living space. A professional will be able to spot potential issues before they get out of hand. If moisture buildup is noticed during an inspection, encapsulation will help reduce the risk of mold growth, pest activity, structural concerns, or damage to insulation.
Crawl Space Encapsulation and Moisture Control in Alexandria, Fairfax, and Arlington
The experts at Summit Environmental Solutions can help homeowners in Alexandria, Fairfax, and Arlington with crawl space encapsulation, basement waterproofing, and moisture control. Don’t wait until the summer heat and humidity make crawl space problems worse. To schedule a free inspection, contact Summit Environmental Solutions at (703) 520-5868 or fill out our contact form today.
Check out this video of our team conducting a crawl space inspection for more information on the process.
