Crawl Space
Inspection
in Maryland

OBW's crawl space inspection covers six primary categories. Structural: every accessible joist, beam, sill plate, rim joist, and support post is probed with an awl and assessed for decay, insect damage, or mechanical failure. Moisture: wood moisture content readings are taken at multiple locations across the crawl space; a moisture meter reading above 19% indicates elevated decay risk. Visual signs of moisture infiltration — staining on the vapor barrier, efflorescence on piers, active water entry — are documented.

Pest evidence: mud tubes, frass, termite galleries, and rodent nesting material are identified and documented. This is not a licensed pest inspection — OBW cannot provide a termite clearance letter — but we document visible evidence and advise on pest control referral when warranted. Insulation: batt insulation condition, coverage, and whether it's fallen out of joist bays. HVAC and mechanicals: ductwork condition, condensate drainage, and whether supply/return runs in the crawl space are intact and insulated. Vapor barrier and drainage: existing vapor barrier condition, coverage, and whether any drainage infrastructure is present and functioning.

Everything found is documented with photographs taken at the time of inspection. You receive those photos. The written inspection report describes each finding category with the specific observations and, where structural or moisture issues are identified, the recommended remediation.

Most OBW crawl space inspections take 45 minutes to 90 minutes from arrival to written report delivery. The time inside the crawl space varies: a straightforward 1,000 square foot crawl space with good clearance and minimal findings can be assessed in 20–30 minutes. A larger space, low clearance that requires more careful navigation, or a space with extensive findings that require thorough documentation can run 45–60 minutes inside.

After the crawl space time, the inspector completes the written report, selects representative photos, and reviews the findings with you on-site. This conversation takes 15–20 minutes in most cases — longer if you have questions about specific findings or want to discuss options for any issues identified.

One variable: if the crawl space access hatch is in an inconvenient location (inside a closet, under furniture, or requiring significant furniture movement), account for that time. Let us know about access challenges when scheduling. We'll bring the right equipment and plan accordingly.

Yes, for the initial scheduling and final report review. OBW inspectors review their findings with you in person at the end of the inspection — this conversation is part of the inspection deliverable, not an optional add-on. The written report and photos are meaningful, but the inspector's explanation of what they found, what it means, and what the options are is what makes the inspection useful rather than just a document.

During the time the inspector is actually in the crawl space, you don't need to hover nearby. Most homeowners use that time normally. When the inspector is ready to review findings, they'll come find you.

For real estate transactions where you're the buyer and the seller is the occupant: coordinate with the seller's agent to confirm access. OBW can work with real estate agents to schedule inspections during showing windows if needed. If you're a buyer and the home is vacant, a lockbox access arrangement works — but plan to either be present or have your agent present for the final review.

An OBW crawl space inspection is always free and comes with no obligation. If the inspection reveals no issues — clean, dry space, sound structure, adequate vapor barrier — you get a report that says exactly that. There's no minimum purchase required and no obligation to schedule follow-up work.

If the inspection identifies issues that warrant repair, encapsulation, or cleaning, the inspector will describe what they found and can provide a written estimate during the same visit in many cases. For complex multi-scope projects, the detailed quote is prepared and delivered within 24 hours of the inspection. The estimate is itemized — every line of work with associated pricing — not a vague project total.

The distinction matters because some contractors use 'free inspections' as a pretext for a sales visit. OBW inspectors take a consultative approach — focused on diagnosing accurately, not making a sale. If your crawl space is fine, that's what we'll tell you. If there are problems, we'll describe them accurately and give you a specific written price before any work is discussed.

Maryland's Piedmont clay soils create specific conditions that OBW inspectors are trained to recognize and document. Clay soils have low permeability — they hold water rather than draining it. After a significant rain event, saturated clay against a crawl space foundation can maintain elevated moisture in the crawl space for days or weeks. This sustained elevation drives higher wood moisture content readings even in crawl spaces with no visible water intrusion.

Freeze-thaw cycles in Maryland winters affect pier footings and foundation walls. Repeated freezing and thawing of saturated clay adjacent to concrete footings can cause soil movement that shifts pier positions over time. OBW inspectors look for evidence of pier settlement — gaps between the top plate and the beam, or posts that appear compressed or tilted — particularly in homes more than 30 years old.

Maryland's Chesapeake Bay watershed contributes to elevated regional humidity throughout spring, summer, and fall. Condensation on crawl space structural members during warm, humid conditions is a primary moisture source in many Maryland homes — not groundwater, but atmospheric moisture. OBW's inspection captures this through wood moisture content readings taken on a clear day after a period of warm, humid weather — a reading above 19% in those conditions indicates the space needs active moisture management.