Built for the Tightest Access
Micro
Piles
in Maryland
Small-diameter, drilled and grouted underpinning for the tightest access sites, historic rowhomes included
Micro piles reach the same goal as push or helical piers, transferring a settled foundation's load to stable soil, using compact drilled and grouted piles that fit where larger pier equipment can't. A common fit for historic Baltimore rowhomes with narrow interior access.
Small Diameter, High Capacity
Why Access, Not Load,
Drives the Choice
Micro piles do the same underlying job as OBW's push piers, transferring a settled foundation's load down to soil that can bear it, but they get there with small-diameter piles that are drilled and grouted in place rather than driven with a large hydraulic rig. That drilled and grouted process is what gives a slender pile its load capacity, allowing compact equipment to do work that would otherwise need much larger machinery.
That compact footprint is the whole reason micro piles exist as a distinct method. Baltimore's rowhomes and other historic Maryland construction, 1880s stone and hand-mortared brick foundations in particular, often have narrow interior access, low headroom, and no side yard for larger equipment. Micro piles are frequently the practical answer in exactly those situations.
Narrow interior access typical of historic Baltimore construction, where micro piles are often the practical fit
When Micro Piles Fit
Access Situations
That Call for Micro Piles
- Low basement headroom that standard pier rigs can't work in
- Attached rowhomes with no side yard for equipment access
- Settlement affecting interior sections not reachable from an exterior excavation
What's Included
OBW's Micro Pile Process
Access Assessment
We evaluate whether a site's clearance and access truly requires micro pile equipment versus standard push pier rigs.
Drilled and Grouted Installation
Small-diameter piles are drilled and grouted in place, achieving high load capacity through the installation method rather than pier size.
Compact Equipment
Suited to tight interior spaces, low basement headroom, and historic rowhomes with no side yard access for larger rigs.
Historic Construction Experience
OBW's decades in Baltimore include 1880s stone and hand-mortared brick foundations and the access techniques those homes require.
Common Questions
Micro Pile Questions from
Maryland Homeowners
What makes micro piles different from push piers or helical piers?
Micro piles are small-diameter, drilled and grouted piles, generally installed with compact equipment that can operate in spaces too tight or too low-clearance for the larger rigs push and helical pier installation typically uses. They achieve high load capacity for their diameter through the drilling and grouting process rather than through the size of the pier itself.
The tradeoff is installation method and access, not underlying purpose. All three pier types transfer a foundation's load to more stable soil; micro piles are the option when a site's access constraints rule out the equipment the other two methods need.
Are micro piles common for historic Baltimore rowhomes?
Historic Baltimore rowhomes, and homes with 1880s stone or hand-mortared brick foundations, often have narrow interior access, low basement headroom, and no side yard to bring larger pier equipment through. Micro pile equipment's smaller footprint makes it a common fit for exactly these access-constrained, historic-construction situations.
Why Oriole
Why Maryland Homeowners Trust
OBW with Historic Foundations
Historic Home Experience
70 years working on Baltimore rowhomes and pre-1900s foundations informs how we approach access-constrained sites.
Written Workmanship Guarantee
Micro pile installations are backed by a written workmanship guarantee, terms vary by service, ask your inspector.
No Subcontracting
OBW's own crew performs the work in-house, historic-home access techniques included.
Family-Owned Since 1953
Founded by Frank Pirog Sr. in 1953. Amber Pirog leads the company today.
Tight Access, Settling Foundation?
Free inspection. Honest recommendation on whether micro piles fit your home's access constraints.
Family-owned since 1953 · MHIC #4247 · Written Workmanship Guarantee