Washington · IECC Climate Zone 4C-5B · Marine west, semi-arid east
Healthy Homes for Washington — Marine Damp and a Strict Energy Code
Virtual Home Health Score assessments statewide. GaiaCrete™ assemblies modeled against the Washington State Energy Code. Founding Mr Hemp House® dealer territories open by ZIP code.
Chronic marine moisture
Puget Sound's mild wet climate keeps Washington wall assemblies near saturation for months, so drying capacity matters more than raw R-value.
Strict state energy code
The Washington State Energy Code sets aggressive envelope and equipment targets, so assemblies must be modeled, not assumed compliant.
Smoke season and seismic risk
Eastern and western Washington both see summer smoke episodes, while the Cascadia subduction zone drives seismic detailing statewide.
What Climate Zone 4C-5B Means for Washington Homes
Washington's Puget Sound region is Zone 4C marine — mild, wet, and rarely dry enough for a wall to recover — while the Columbia Basin east of the Cascades is semi-arid Zone 5B. The Washington State Energy Code is among the strictest in the nation and is written toward net-zero-ready construction. Cascadia seismic risk and recurring smoke seasons round out the design picture.
Washington State Energy Code (WSEC), Residential Provisions
Washington maintains its own energy code, stricter than the base IECC, with a legislated path toward net-zero-ready buildings.
Start With Your Home Health Score in Washington
Virtual Healthy Home Assessments available in Washington. 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 Washington
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 Washington
Washington has no certified dealer yet. Founding dealers get territory priority, training, and direct GaiaCrete™ supply as the platform expands.
Claim the Washington territoryCredentials Behind Every Washington 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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