Crawlspaces are often out of sight, out of mind—but ignoring what’s under your home can come with serious consequences. As someone who’s spent more time under homes than most would care to imagine, I can tell you that what lies beneath your floorboards isn’t always harmless.
Whether you’re a homeowner taking a peek or a buyer inspecting a property, it’s important to understand the potential dangers that may be waiting in the crawlspace—and how to safely approach them.
What Could Be Hiding Down There?
- Moisture and Mold
Washington’s damp climate makes crawlspaces especially prone to moisture intrusion. Water vapor rising from the ground or leaking from plumbing lines can create the perfect environment for mold, mildew, and wood rot. These aren’t just structural concerns—they can pose serious health risks, especially to those with respiratory sensitivities. - Pest Infestations
Rodents, spiders, termites, carpenter ants—you name it. Crawlspaces provide dark, sheltered environments ideal for pests. Rodents chew through insulation and wiring, while termites silently consume wooden supports. In some cases, you might even find nests or droppings indicating a long-term infestation. - Asbestos and Contaminants
Older homes might have asbestos-wrapped ductwork or contaminated soil from past pesticide use or fuel storage. Disturbing these materials can release harmful particles into the air, so always tread carefully and avoid unnecessary disruption. - Structural Red Flags
Uneven piers, sagging joists, and rusted supports are more than just signs of aging—they can signal active structural deterioration. Left unchecked, these issues can lead to costly repairs or even major safety concerns.
Before You Enter: Protect Yourself
If you must enter your crawlspace, preparation is key. Here’s how to stay safe:
- Dress for the Job: Wear durable clothing, gloves, and knee pads. A headlamp can keep your hands free while providing better visibility.
- Use Protective Gear: Always wear an N95 or better respirator, especially if mold or rodent droppings are present. Safety goggles are essential to protect against dust and debris.
- Check the Air: Crawlspaces can accumulate dangerous gases like radon or suffer from low oxygen levels. If you’re unsure, ventilate the space first or consult a professional with gas detection equipment.
- Watch for Wildlife: Tap or make noise before entering. Small animals often hide in tight spots and may become aggressive if startled.
- Don’t Go Alone: If possible, have someone else nearby in case of emergency.
Know When to Call a Professional
Some crawlspace hazards require more than just gloves and courage. If you notice heavy mold, standing water, pest infestations, or structural damage—stop and call in a trained expert.
The space under your home might be hidden, but it shouldn’t be ignored. A routine inspection could save you thousands—and keep you safer above ground.