Crawlspaces & Basements.
What’s under your home tells a big part of its story. Crawlspaces and basements are where we catch moisture, structural, and pest issues early. Here’s what we check and how to keep them dry.
What we check during an inspection
Where it’s safely accessible, we get into these spaces — a lot of a home’s health shows up here first.
✓ Overall condition & access
We enter where access permits and note general condition.
✓ Moisture
Standing water, dampness, and efflorescence (white mineral staining) on masonry.
✓ Vapor barrier
Whether the crawlspace soil is covered and the barrier is intact.
✓ Structure
Joists, beams, posts, and the sill plate for rot, sagging, or damage.
✓ Sump pump
Presence and operation of a sump pump where one exists.
✓ Insulation, ventilation & pests
Condition of insulation and airflow, plus any signs of pests.
Common problems we find
✓ Water & dampness
Standing water or chronic humidity that threatens structure and air quality.
✓ Missing vapor barrier
Bare or exposed soil pumping moisture into the home.
✓ Rot & pest damage
Wood members compromised by moisture or wood-destroying insects.
✓ Sump pump failures
Pumps that are absent, failed, or improperly discharging.
✓ Poor ventilation
Stagnant, humid air leading to mold.
✓ Foundation seepage
Cracks and water entry along basement walls.
What you can maintain yourself
✓ Keep water away
Gutters and grading that direct water away from the home do most of the work.
✓ Test the sump pump
Pour a bucket of water into the pit and confirm it kicks on and drains.
✓ Maintain the vapor barrier
Keep crawlspace soil covered and patch tears.
✓ Control humidity
A dehumidifier in a damp basement makes a big difference.
✓ Check periodically
Look for water, pests, and rot a couple times a year.
✓ Protect the pipes
Insulate exposed pipes in these spaces against freezing.
This guide is for general education. It reflects what we look for during a home inspection, not a substitute for a licensed professional. If you have a specific concern, please contact a foundation or waterproofing specialist — and of course, we’re always happy to take a look during an inspection.
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Read →Concerned about your crawlspaces & basements?
We’ll give your home a thorough, plain-English inspection and flag anything worth a closer look.