Headquartered in Joppa, MD · Serving Maryland Since 1953
Service Areas
Oriole serves six Maryland counties, Harford, Baltimore, Baltimore City, Anne Arundel, Carroll, and Cecil. Local inspectors, same-day written quotes, and a written workmanship guarantee, terms vary by service.
Where We Work
Six Maryland
Counties
OBW inspectors are based locally, not dispatched from a regional office hours away. Same-day or next-day inspections available throughout our service area.
Full Service Hubs
Schedule an InspectionCoverage
Areas We Serve
Six Maryland cities carry our full range of services. Each one also covers the surrounding areas listed beneath it, with the same crews and the same written workmanship guarantee.
Maryland
30 CitiesFull Service Hubs 6 Cities
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The Wider Areas We Serve 24 Cities
- Aberdeen Bel Air South
- Annapolis Severna Park
- Bel Air Bel Air South
- Bel Air North Bel Air South
- Canton Baltimore
- Catonsville Baltimore
- Crofton Severn
- Dundalk Baltimore
- Edgewood Bel Air South
- Essex Baltimore
- Fallston Bel Air South
- Federal Hill Baltimore
- Fells Point Baltimore
- Glen Burnie Severna Park
- Hampden Baltimore
- Havre de Grace Bel Air South
- Joppa Bel Air South
- Owings Mills Baltimore
- Parkville Baltimore
- Pasadena Severna Park
- Perry Hall Baltimore
- Pikesville Baltimore
- Towson Baltimore
- Waverly Baltimore
Built for Maryland Conditions
Why Maryland Needs a
Maryland Specialist
Piedmont Clay Soils
Maryland's Piedmont plateau, covering most of Harford, Baltimore, Carroll, and Cecil counties, is underlain by expansive clay soils that hold saturation for days after a storm and press against foundation walls with hydrostatic pressure that generic national-brand systems aren't engineered for.
Chesapeake Bay Water Table
Properties near the Bay, the Patuxent, and the Susquehanna sit on high water tables that create constant upward pressure on basement slabs and crawl space floors. OBW's drain tile and sump systems are sized and specified for these conditions, not adapted from a Florida or Texas playbook.
Maryland Freeze-Thaw Cycles
Maryland winters cycle repeatedly through freeze and thaw, often multiple times in a single week. Each cycle expands and contracts the soil against your foundation, widening hairline cracks over time. OBW's artery crack repair method uses hydraulic cement with mesh reinforcement that flexes with these cycles instead of re-cracking.
Local Since 1953
Frank Pirog Sr. founded Oriole in Maryland over 70 years ago. Three generations of the Pirog family have waterproofed basements in these same counties, through every soil type, every water table condition, and every building era from post-war rowhouses to modern colonials.
Is Your Home in Our Service Area?
Call or request an inspection online. We'll confirm coverage, schedule a local inspector, and provide a written quote the same day, at no charge.
Family-owned since 1953 · MHIC #4247 · Written Workmanship Guarantee