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 Lifetime Transferable Guarantee on every job.
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.
Top Cities We Serve
- Bel Air, MD
- Joppa, MD
- Aberdeen, MD
- Towson, MD
- Catonsville, MD
- Dundalk, MD
- Baltimore City, MD
- Annapolis, MD
- Glen Burnie, MD
- Westminster, MD
- Elkton, MD
- White Marsh, MD
- Owings Mills, MD
- Perry Hall, MD
Coverage by County
All Counties & Cities
Harford County HQ
OBW Headquarters — Joppa, MD
Baltimore County
Full county coverage
- Towson
- Catonsville
- Dundalk
- Essex
- Parkville
- White Marsh
- Lutherville
- Owings Mills
- Pikesville
- Perry Hall
Baltimore City
All neighborhoods served
Anne Arundel County
Including Annapolis metro
Carroll County
Westminster & surrounding
Cecil County
Including Elkton & Perryville
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 · Lifetime Transferable Guarantee