What is GaiaCrete made of?

GaiaCrete® is a proprietary bio-based insulation made from hemp hurd, natural hydraulic lime, misc pozzolans and more. This hempcrete alternative is 100% non-toxic, carbon-negative, and contains zero synthetic chemicals or petroleum-based ingredients. It's also available as GaiaBlocs™ — pre-formed blocks for easy retrofitting and new construction.

How does GaiaCrete compare to hempcrete?

GaiaCrete® is an advanced hempcrete alternative engineered for superior performance. While traditional hempcrete uses a simple hemp-lime mix, GaiaCrete® adds misc pozzolans and more for improved fire resistance (4-hour rating), structural integrity, and ease of application. Both are bio-based insulation, but GaiaCrete® outperforms in every category.

Is GaiaCrete better than spray foam?

Yes. GaiaCrete® bio-based insulation is non-toxic (zero VOCs vs spray foam's isocyanates), fire-resistant without chemicals (4-hour rating vs spray foam's combustibility), mold-proof at pH 12+, and lasts 100+ years vs spray foam's 20-30 years. It's also carbon-negative insulation while spray foam has high embodied carbon.

Is GaiaCrete better than fiberglass insulation?

Yes. GaiaCrete® eliminates every weakness of fiberglass: it doesn't trap moisture or breed mold, contains zero formaldehyde binders, provides structural support, and lasts 100+ years vs fiberglass's 15-25 year lifespan. Fiberglass also loses R-value when wet, while GaiaCrete® actively buffers moisture.

What is the R-value of GaiaCrete?

GaiaCrete® has an R-Value of 3.5–5 per inch depending on the GaiaCrete® blend used. Combined with superior thermal mass, moisture buffering, and a 100+ year lifespan, GaiaCrete® delivers the best real-world thermal performance of any bio-based insulation — making it the better long-term insulation investment as a hempcrete alternative.

GaiaBlocs™ are pre-formed blocks made from GaiaCrete® — the same proprietary bio-based insulation formula in a stackable block format. GaiaBlocs™ are designed for retrofitting existing homes and new construction projects where blocks are faster and easier to install than spray or pour applications.

How much does GaiaCrete cost?

GaiaCrete® hemp insulation costs between $180–$360+ per square foot installed for completed wall assemblies. While the upfront cost is higher than conventional insulation, the 100+ year lifespan, zero maintenance, energy savings, and elimination of toxic replacement cycles make it the most cost-effective insulation over a building's lifetime.

America's Premium Hempcrete Alternative

GaiaCrete® — Non-Toxic, Carbon-Negative Insulation Built to Last 100+ Years

Name: GaiaCrete® Bio-Based Insulation
Brand: Mr Hemp House™
Price: 180 USD
Availability: InStock
Rating: 5.0 (2 reviews)

GaiaCrete® is Mr Hemp House's proprietary hempcrete alternative — combining hemp hurd, natural hydraulic lime, and misc pozzolans and more into a bio-based insulation that is permanently mold-proof at pH 12+, fire-resistant up to 4 hours, and 100% non-toxic with zero VOC emissions. Now also available as GaiaBlocs™ pre-formed blocks for retrofitting and new construction.

Get a Free Consultation 📞 (740) 300-1565

What Is GaiaCrete® Bio-Based Insulation?

GaiaCrete® is a proprietary bio-based insulation system developed by Mr Hemp House™. Unlike traditional hempcrete, GaiaCrete® is engineered with misc pozzolans and more for dramatically improved fire resistance, structural integrity, and application flexibility. It replaces toxic insulation materials like spray foam, fiberglass, and cellulose with a material that is healthier for your family and the planet.

GaiaCrete® Wall Mix

R-3.5/inch

Standard wall assemblies — spray or pour application

GaiaCrete® Attic Mix

R-4.2/inch

Loose-fill attic insulation — blown or poured

GaiaCrete® Dense Pack

R-5.0/inch

Maximum density for high-performance walls

Why GaiaCrete® Is the Healthiest Insulation You Can Install

Every benefit is backed by lab testing. GaiaCrete® bio-based insulation outperforms conventional materials in health, safety, longevity, and environmental impact.

100+ Year Lifespan

GaiaCrete® bio-based insulation outlasts every conventional material. This hempcrete alternative gets stronger over time through lime carbonation — no replacement cycles, no toxic waste.

4+ Hour Fire Rating

No chemical fire retardants needed. GaiaCrete® is naturally fire-resistant insulation — non-combustible with zero toxic fumes when exposed to flame.

Mold-Proof at pH 12+

Permanently antimicrobial. Mold physically cannot grow in GaiaCrete® insulation — the alkaline pH of 12.4 ± 0.2 creates an environment hostile to all fungal growth.

Carbon-Negative Insulation

GaiaCrete® sequesters more CO₂ than it takes to produce — net −112 kg CO₂e/m³. Your walls actively fight climate change for the life of the building.

Zero VOC Off-Gassing

100% non-toxic from day one. No formaldehyde, no isocyanates, no flame retardants, no harmful chemicals — ever. Safe for children, pets, and chemically sensitive individuals.

Superior Acoustic Performance

GaiaCrete® naturally dampens sound transmission — reducing noise between rooms and from outside. Quieter homes without additional soundproofing products.

GaiaCrete® Verified Performance Data

Lab-tested. Third-party verified. Every claim is backed by data — view the full technical documents on our resources page.

Specification	GaiaCrete® Value
Thermal Performance (R-Value)	R-3.5 to R-5.0 per inch (blend dependent)
Fire Resistance	Up to 4-hour rating — zero toxic fumes
Mold Resistance (pH)	pH 12.4 ± 0.2 — mold growth impossible
VOC Emissions	Zero — 100% non-toxic, no off-gassing
Carbon Impact	Carbon negative: net −112 kg CO₂e/m³
Lifespan	100+ years — strengthens via lime carbonation
Moisture Buffering	Active humidity regulation (40-60% RH)
Pest / Rodent Resistance	pH 12+ matrix — resistant to pests, insects, rodents
Structural Contribution	Monolithic — adds structural integrity to walls
Application Methods	Spray, pour, panel, or GaiaBlocs™ blocks

View Full Technical Documents

Not Sure If GaiaCrete® Is Right for Your Project?

Start with a free healthy home assessment to understand your home's current health — then get a personalized GaiaCrete® recommendation.

Request a Free Quote Take the Free Assessment

Best Use Cases for GaiaCrete® Insulation

GaiaCrete® and GaiaBlocs™ serve every building type — from single-family homes to commercial projects.

Residential Retrofits

Replace toxic spray foam or fiberglass in existing walls, attics, and basements with GaiaBlocs™ or poured GaiaCrete®.

New Home Construction

Build healthier from the ground up — spray, pour, or stack GaiaBlocs™ for a complete non-toxic thermal envelope.

Moisture & Mold Zones

Basements, crawl spaces, coastal homes — anywhere moisture causes problems, GaiaCrete's pH 12+ prevents mold permanently.

Green & Net-Zero Builds

Carbon-negative insulation helps achieve LEED, Passive House, and net-zero energy goals with verified lifecycle data.

New Product

GaiaBlocs™ — GaiaCrete® in Pre-Formed Blocks

All the benefits of GaiaCrete® bio-based insulation in a stackable, easy-to-install block format — ideal for retrofitting existing homes and new construction.

🏠 Retrofitting With GaiaBlocs™

GaiaBlocs™ are engineered for retrofitting existing homes where spray or pour applications are impractical. These pre-formed blocks fit into existing wall cavities, add exterior insulation, and transform attics and basements.

No formwork needed — stack and fit directly
Ideal for wall cavity, attic, and basement retrofits
Minimal disruption to existing structures
Same mold-proof pH 12+ as GaiaCrete®

🏗️ New Construction With GaiaBlocs™

For new builds, GaiaBlocs™ offer faster installation and consistent quality control compared to wet-mix applications. Stack like masonry while getting all the benefits of GaiaCrete®.

Faster than wet-mix GaiaCrete® installation
Consistent density and R-value per block
Stackable like masonry — familiar to contractors
4+ hour fire rating, carbon-negative

Get a GaiaBlocs™ Quote

GaiaCrete® vs Hempcrete vs Spray Foam: Full Comparison

See how GaiaCrete® bio-based insulation compares across every performance metric. For deeper analysis, read our GaiaCrete® vs spray foam and GaiaCrete® vs fiberglass comparison guides.

Feature	GaiaCrete®	Traditional Hempcrete	Spray Foam
Material Type	Proprietary bio-based insulation	Hemp + lime mix	Petroleum-based polyurethane
Fire Rating	4+ hours (no chemicals)	1-2 hours	Burns & produces toxic fumes
Mold Resistance	Impossible at pH 12+	Naturally resistant	Traps moisture → mold growth
Carbon Impact	Carbon-negative insulation	Carbon negative	High embodied carbon
VOC Off-Gassing	Zero — 100% non-toxic	Zero — non-toxic	Isocyanates for 20+ years
Lifespan	100+ years, gets stronger	80-100 years	15-25 years, degrades
Structural Support	Monolithic — adds structure	Semi-structural	None — fill only
Moisture Control	Active humidity buffering	Good breathability	Vapor barrier — traps moisture
R-Value / Inch	R-3.5 to R-5	R-2 to R-2.5	R-6 to R-7
Installation	Spray, pour, panel, or GaiaBlocs™	Hand-pack or slip-form	Professional spray only

GaiaCrete® Bio-Based Insulation Transforms Every Room

Compare Toxic vs Mold-Proof GaiaCrete® Insulation Rooms

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Healthy hemp-insulated living room with GaiaCrete hempcrete alternative - gaiacrete® hempcrete

✗ TOXIC

✓ HEALTHY

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Toxic drywall, fiberglass batts, plastic vapor barrier — off-gassing VOCs

GaiaCrete® hempcrete, lime clay plaster, MgO board — zero toxins

$3,200

saved / year

68% fewer respiratory issues

health impact

Family time up 2.4 hrs/week

happiness

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GaiaCrete® Technical Data & Research

Third-party verified lab results, carbon lifecycle analysis, and peer-reviewed methodology.

Technical Specifications

R-value, fire rating, pH, VOC, and compressive strength lab data (ASTM certified).

Read on Resources Page

Healthy Home Score™ Methodology

Evidence-based assessment protocol validated across 619 homes. Aligned with BPI, HUD, and EPA standards.

Read on Resources Page

Carbon Lifecycle Analysis

Full ISO 14040 cradle-to-grave carbon accounting showing net −112 kg CO₂e/m³.

Read on Resources Page

Ready to Build With GaiaCrete®?

Get a free consultation and discover how GaiaCrete® hemp insulation can transform your home — mold-proof, fire-resistant, carbon-negative, and built to last over 100 years.

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GaiaCrete® FAQ