BASEMENT WATERPROOFING · FOUNDATION REPAIR · CRAWL SPACE
Maryland's Trusted Basement Waterproofing & Foundation Repair Since 1953
Dry basements.
Sound foundations.
Leave ALL the
worry to us.
Four generations of Pirogs have been fixing Maryland basements since 1953. Written quote same day. Lifetime Transferable Guarantee on every job. No commissioned salespeople — ever.
What We Do
Four Core Services.
All Maryland-Specific.
Every service is backed by OBW's Lifetime Transferable Guarantee and performed by our own in-house crews — never subcontractors.
Basement Waterproofing
Interior drainage, exterior membranes, crack repair, vapor barriers, sump pumps. Maryland's most common home repair — done right the first time.
Learn moreFoundation Repair
Carbon fiber reinforcement, helical piers, wall anchors, crack injection. We stabilize what's moving before it gets worse.
Learn moreCrawl Space Encapsulation
Heavy-duty liner, professional dehumidification, integrated drainage. Maryland crawlspaces hold moisture. We seal yours permanently.
Learn moreCrawl Space Repair
Sagging floors, wood rot, crawl space jacks, termite damage, subfloor restoration. Structural repairs backed by a Lifetime Guarantee.
Learn moreFind Your Solution
What's Happening
With Your Home?
Pick the symptom that best fits. We'll tell you what it means and point you to the right solution — or schedule a free inspection and we'll diagnose it for you.
Our inspectors diagnose first — no pressure, written quote same day.
Why It Matters
What Makes Oriole Different
from Every Other Option
These aren't marketing claims. They're structural decisions built into this company over 73 years of family ownership.
No Commissioned Salespeople
In 73 years, Oriole has never employed a commissioned salesperson. Our inspectors are paid to diagnose accurately — not to close you on the largest system.
Lifetime Transferable Guarantee
Our guarantee follows the property, not the owner. When you sell your Maryland home, the next owner inherits the warranty. No national franchise offers that.
Maryland-Built Systems
Piedmont clay. Chesapeake water tables. Maryland freeze-thaw cycles. Our systems are engineered for these conditions — not adapted from a generic national playbook.
Our Crew Does the Work
No subcontractors on waterproofing or foundation jobs. The crew that shows up was trained in-house and is accountable to the Pirog family that has been in this county since 1953.
of Pirogs
Family-Owned Since 1953
Started by Frank Sr.
Still family-run.
Frank Pirog Sr. founded Oriole in 1953 as Maryland's first dedicated basement waterproofing company. His son Frank Jr. took over in the 70s. Frank III ran the business through the 90s and 2000s. Today, Amber Pirog — Frank Sr.'s great-granddaughter — is CEO. Her cousin Mark Michael runs operations.
We've completed 4,000+ jobs across Maryland. Every one is backed by a Lifetime, Transferable Guarantee — because we plan to still be here for the fifth generation.
What Maryland Homeowners Say
4.9 Stars Across 200+ Reviews
"Oriole did a tremendous job. The sump pump was replaced very quickly and they were professional and supportive even though the job required more than we anticipated. Fantastic group of guys — I would recommend them to anyone."
"We had water seeping through our basement walls after every heavy rain. OBW came out, gave us a written quote the same day, and had the system installed within the week. Two years later — completely dry. Wish we'd called sooner."
"Frank and his team were outstanding. No pressure, no upsell, just an honest assessment of what we needed. The lifetime transferable guarantee was the deciding factor — we're selling the house in a few years and this was a real selling point."
Ready to solve your basement problem?
Free inspection. Written quote same day. No commissioned salespeople — that's been true since 1953.
Family-owned since 1953 · Joppa, MD · MHIC #4247 · Lifetime Transferable Guarantee