For decades, builders installed crawl space vents in homes across the Eastern Shore, believing these openings were essential to allow the crawl space to "breathe". The traditional wisdom held that open-vented crawl spaces would promote air circulation and dry out moisture.
But did you know open crawl space vents are actually detrimental to your home’s comfort, health, and energy efficiency?
Contractors leading improved building science best practices, like Total Home Performance, have moved away from this practice, as we know that opening your crawl space air vents invites problems and unwanted guests. The correct path we follow is to seal, insulate, and condition the crawl space as part of your home’s living area.
Unsealed Vents: The Root Cause of Severe Crawl Space Problems
Many of the most common issues houses along the Eastern Shore of Maryland and Delaware face can be traced directly back to unsealed crawl space vents. These issues include:
Moisture & Mold Growth
The humid Eastern Shore climate means the outside air carries a massive amount of moisture. When this warm, humid air enters your crawl space vents and meets the cooler surfaces inside, like dirt floors, pipes, and cold air ducts, it immediately causes condensation. This excess moisture is what encourages destructive mold and mildew growth. Mold is not only detrimental to your family's health, but it also damages the structural integrity of your home's wood, insulation, and ductwork.
If humidity and moisture are a constant issue throughout your Maryland or Delaware home, speak with us about scheduling our moisture & humidity assessments.
Pest Infestation
Vented crawl spaces also serve as an open door for pests. Even the smallest of insects, rodents, and other critters can easily enter your home through unsealed crawl space openings, nesting in your insulation and introducing more bacteria and contaminants that severely degrade your indoor air quality, and threaten your home’s overall health.
Cold Floors, Drafts & High Energy Bills
During the winter, cold air from the outside flows freely into your crawl space through open crawl space vents. Because of what is called “the stack effect”, where rising warm air pulls replacement air from the bottom of your house, this cold air is then sucked up into your living space. This leads to cold floors, uncomfortable drafts, and forces your heating system to work overtime, driving up your energy bills.
You’ve Sealed Your Vents… Now What?
Simply sealing your crawl space vents is a good start, but it is not a complete, permanent solution. Vent sealing alone will not stop air or moisture infiltration through other existing gaps, cracks, or from the ground. Critically, it does not address any existing moisture or mold problems.
At Total Home Performance, we diagnose each home to understand how your unique home works as a system and where problems might persist. The most effective way to address a crawl space is with a comprehensive, customized approach:
- Address Water Issues First: If standing water or groundwater is present, it must be resolved. We implement solutions like a specialized drainage system or a sump pump to collect and pump water out of and away from your house. Leaking ductwork must also be sealed at the seams.
- French Drain Installation: If water is a consistent or seasonal issue with your crawl space or along your foundation, exterior french drain installation is often a necessary fix.
- Crawl Space Encapsulation: This is your home’s core solution. Once major moisture problems are managed, the crawl space can be air sealed, insulated, and fully sealed off. A clean, durable vapor barrier is installed on the floor and walls.
- Humidity Control: The final, vital step is installing a specialized crawl space dehumidifier to ensure that humidity levels remain consistently low year-round, preventing condensation and mold.
Total Home Performance: Maryland’s Crawl Space Authority
Total Home Performance is the trusted whole-home building science expert for crawl space encapsulation in the Chesapeake Bay area. We are highly experienced in both crawl space repair and encapsulation, having sealed well over 1,500 crawl spaces. We evaluate your entire home to find a long-term solution that fits your specific needs and budget.
Plus, as we’re certified, we can help you qualify for valuable Home Performance with ENERGY STAR® rebates for your crawl space services.
Let us turn your crawl space from a dark, damp problem area into a space that provides peace of mind, dramatically increases your home's energy efficiency, and helps lower your utility bills.