Moisture Rises Whether You Notice or Not
Crawl Space
Encapsulation
in Maryland
Maryland crawl spaces hold ground moisture year round. That moisture rises into your living space and feeds mold, rot, and higher radon levels.
Reinforced 12 to 20 mil liner, commercial grade dehumidification, integrated drainage, spray foam insulation, and vent sealing. OBW encapsulates Maryland crawl spaces and backs the work with the same written workmanship guarantee we put on every waterproofing job, ask your inspector for the exact term.
Seal It Properly
What Crawl Space Encapsulation
Actually Does
An unsealed Maryland crawl space is basically a large evaporation pan under your house. Ground moisture rises, condenses on cold joists, and feeds rot from underneath, slowly, for years. Encapsulation breaks that cycle.
We use reinforced poly liner matched to your crawl space conditions, 12 to 20 mil depending on moisture load and access. Every seam is mechanically sealed with butyl tape. Walls are wrapped. Piers are sleeved. The space becomes part of your home's conditioned envelope.
OBW inspectors diagnose the moisture source before recommending a system. A crawl space with active groundwater needs drainage before liner goes down. One with only vapor intrusion may only need liner and dehumidification. We scope it correctly the first time.
The Difference It Makes
One Crawl Space,
Before and After Encapsulation
All Services
Crawl Space Encapsulation
Services in Maryland
Every repair is scoped after a free inspection. No phone estimates, honest, consultative guidance.
Climate Control
Dehumidifier Installation
Professional grade unit sized to your square footage. Manages humidity the liner alone cannot catch, which is critical for Maryland summers.
Crawl Space Insulation
Insulation as part of a full encapsulation package, making the crawl space part of your home's conditioned envelope.
Drainage & Sealing
Drainage System Installation
Perimeter drainage under the liner tied to your sump, for crawl spaces where groundwater is active. We won't put liner over standing water.
Crawl Space Vent Sealing
Open foundation vents pump humid outside air in during summer. We seal them permanently, which is the correct building science approach.
Warning Signs to Act On
Maryland Crawl Space Warning
Signs You Shouldn't Ignore
Most crawl space problems are invisible from the living space above, until they are not.
- Musty smell throughout the house
- High humidity or condensation inside
- Efflorescence or standing water in crawl
- Bouncy or soft floors above
- Pest activity: rodents, insects, and snakes
- Visible mold on joists or rim joists
Honest Answers
Common Questions About Crawl Space
Encapsulation in Maryland
Call (410) 879-3360 for questions not covered here, our inspectors give honest, consultative guidance.
How much does crawl space encapsulation cost?
We quote every encapsulation job per actual square footage after a free, in-person inspection. No phone estimates, no generic price range. Your final cost depends on square footage, accessibility, moisture load, and whether you need drainage and a dehumidifier.
What liner thickness do you use?
We match liner thickness to your conditions, 12 to 20 mil depending on moisture load, access, and what is in the crawl space. We do not use the same grade on every job. Thicker is not always necessary. Correctly installed is what matters.
Do I really need a dehumidifier?
Most of the time, yes. The liner stops vapor from the ground, and the dehumidifier manages whatever comes in from outside air or your home's interior. Without it, you can still see humidity above 70% in Maryland summers, which is where mold starts. We use manufacturer grade units, not consumer models sold at big box stores.
What about radon?
A properly sealed crawl space can be one part of a broader plan to manage radon in a home. Ask your OBW inspector whether encapsulation may help as part of that plan. Radon mitigation itself is a specialized service, not something OBW provides.
Can you handle mold in the crawl space?
If the mold is clearly related to water infiltration in a space located below grade, yes. We treat affected surfaces before liner installation as part of the encapsulation job. For larger or unrelated mold situations, we refer you to Raven, our trusted remediation partner.
Will encapsulation lower my heating and cooling bills?
Many homeowners report lower heating and cooling costs after encapsulation. Conditioned air no longer fights humid crawl space air, ducts and pipes in the crawl run through a sealed, controlled space, and the building envelope finally makes sense.
70 Years of Maryland Basements
Why Maryland Homeowners Choose
Oriole Over National Brands
Three generations of the Pirog family have been solving Maryland basement problems since Frank Pirog Sr. founded Oriole in 1953.
Honest, Consultative Guidance
Our inspectors diagnose the actual problem first. If a smaller system solves it, that is what we quote. You get an honest assessment of what your property actually needs.
Workmanship Guarantee
Ask your inspector about OBW's workmanship guarantee for your specific job. Terms vary by service, and your inspector will walk through exactly what applies before any work begins.
Maryland Soil Expertise
Piedmont clay, Chesapeake Bay water tables, freeze-thaw cycles. Our systems are engineered for Maryland specifically, not adapted from a national franchise template.
Family-Owned Since 1953
Frank Pirog Sr. founded Oriole over 70 years ago. Today Amber Pirog leads the same family company with the same standard: do the job right.
Free Inspection. Written Quote. No Pressure.
Three Steps to a Sealed,
Sound Maryland Crawl Space
From inspection to completed work, most OBW encapsulation jobs are scheduled within two to three weeks.
Free Inspection
A local OBW inspector crawls your space, identifies the actual moisture source, and documents the scope. Free, no obligation, no sales pressure.
Written Quote Same Day
You receive a specific, itemized quote covering liner gauge, dehumidifier, and drainage before any work is scheduled.
Encapsulation and Warranty
Most jobs finish in two to four days. OBW's own crew completes the work and walks you through the workmanship guarantee that applies to your job before leaving.
That Musty Smell Is Coming From Below.
Free inspection. Written estimate same day. Backed by OBW's written workmanship guarantee, ask your inspector for the exact term.
Family-owned since 1953 · MHIC #4247 · Workmanship Guarantee