Maryland · IECC Climate Zone 4A · Mixed-humid, bay-influenced
Healthy Homes for Maryland — Bay Humidity, Piedmont Radon, Rowhouses
Virtual Home Health Score assessments statewide. GaiaCrete™ detailed for Maryland's Zone 4A Chesapeake humidity and mixed geology. Founding Mr Hemp House® dealer territories open by ZIP code.
Chesapeake humidity load
Bay-driven moisture keeps Maryland interiors above healthy relative humidity for much of the cooling season, favoring mold and dust mites.
Piedmont radon potential
Radon readings across Maryland's Piedmont and western counties run well above coastal-plain levels, and basement living space raises exposure.
Baltimore rowhouse retrofits
Party-wall rowhouses in Maryland were built before air barriers or mechanical ventilation, so retrofit tightening without a ventilation plan backfires.
What Climate Zone 4A Means for Maryland Homes
Maryland's Zone 4A climate is shaped by the Chesapeake Bay, which keeps dew points high from the Eastern Shore through the Baltimore-Washington corridor. Piedmont and mountain counties add measurable radon potential that the coastal plain does not share. Baltimore's rowhouse stock brings its own moisture, lead-era finish, and ventilation questions.
Maryland Building Performance Standards (COMAR 09.12.51)
Maryland adopts the IECC statewide on a rolling cycle, and local jurisdictions may add stricter amendments.
Start With Your Home Health Score in Maryland
Virtual Healthy Home Assessments available in Maryland. In-person coverage expanding.
Home Health Score
A free screening that scores your home across indoor air quality, moisture and mold risk, building materials, and ventilation — so you know where to look first.
Healthy Home Assessment
A professional walkthrough of materials, moisture conditions, and ventilation, delivered as a prioritized action plan. Screening and guidance — not a medical or diagnostic service.
One part of the platform
GaiaCrete™ Insulation & Building Solutions in Maryland
GaiaCrete™, a hempcrete alternative, is Mr Hemp House®'s bio-based hemp-lime building material — used for new construction, retrofits, and insulation upgrades. It is one offering inside the platform, alongside the Home Health Score and Healthy Home Assessment.
- Thermal performance R-2.5+ per inch
- Class A surface burning characteristics (ASTM E84)
- Mold-resistant at pH 12+
- 100% Biobased Carbon Content (ASTM D6866-22)
- Vapor-permeable, no added VOCs
- Net carbon sink by design
Actual thermal performance varies by formulation, density, moisture content, installation method, and complete wall assembly. Final whole-wall thermal performance depends on the complete assembly, including material density, framing, finishes, thermal bridging, moisture conditions, and installation.
Be the First Mr Hemp House® Certified Dealer in Maryland
Maryland has no certified dealer yet. Founding dealers get territory priority, training, and direct GaiaCrete™ supply as the platform expands.
Claim the Maryland territoryCredentials Behind Every Maryland Project
Mr Hemp House® was founded in 2018 in Orlando, Florida.
Veteran-Founded, Veteran-Owned
Founded and owned by a U.S. military veteran.
SBA VOSB Certified
SAM.gov Registered
Active registration in the System for Award Management.
IMPEL Cohort
DOE / Lawrence Berkeley National Laboratory Innovation Program cohort.
VIP Procurement Cohort
Veteran Institute for Procurement graduate.
DOE Zero Energy Ready Home Partner
U.S. Department of Energy Zero Energy Ready Home program partner.
Beta Analytic Verified Testing
ISO/IEC 17025-accredited testing — 100% Biobased Carbon Content per ASTM D6866-22 (Certificate #531872642609133657, October 2022).
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