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THE HEMPCRETE BUILDER’S BIBLE
Build Breathable Walls. Ditch the Mortgage. Live Off-Grid.
Get your free masterclass guide to hempcrete (hemocrete) construction — the carbon-negative hemp-lime wall system that insulates, breathes and outlasts wood. Learn exact mix ratios, casting methods, thermal performance and off-grid design in one field-tested ebook, delivered to your inbox in seconds.
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THE HEMPCRETE SERIES
THE HEMPCRETE
BUILDER’S BIBLE
Cast It. Cure It. Live In It.
MASTERCLASS GUIDE · FREE DIGITAL EDITION
YOUR FREE HEMPCRETE MASTERCLASS
Inside Your Free Hempcrete Guide
Modern housing has become a monthly subscription to survive — nailed together from energy-hungry materials that fight the climate instead of working with it. Hempcrete flips the script: a light, breathable, carbon-negative building envelope you can cast by hand.
This guide strips out academic jargon and hands you the raw, field-tested mechanics — from your first hemp-lime mix to a weather-tight, off-grid shell.
Mix Ratios & Thermal Mass
The exact hempcrete mix ratio by volume, how much water to add, and how to tune density for real-world R-value and thermal mass in walls and floors.
The Hemp-Lime Binder
A step-by-step hemp lime binder recipe, forming and casting techniques, curing timelines, and the mineralisation chemistry that makes hempcrete breathe and last.
Off-Grid & Carbon-Negative
How to pair a hempcrete envelope with a passive solar, off-grid design — moisture management, breathability and a wall assembly that locks carbon away for good.
WHY BUILDERS ARE SWITCHING
Hempcrete vs. Concrete: The Questions Every Builder Asks
Hempcrete is not a load-bearing concrete replacement — it is a lightweight, breathable insulation jacket cast around a structural frame. That single distinction answers most of the confusion around how to build a hempcrete house, why it performs so well in cold climates, and how it handles moisture.
Used correctly, a hemp-lime wall delivers exceptional thermal mass, real R-value insulation, and a carbon-negative footprint that keeps improving over its service life.
● Breathable walls that manage moisture instead of trapping it
● Thermal mass + insulation in a single cast wall assembly
● A carbon-negative building material made from hemp hurd and lime
● DIY-friendly ratios, casting and curing you can master by hand
SUPPORT HEMPCRETE EDUCATION
Help Us Build the Hempcrete Knowledge Base
The free masterclass guide is only the beginning. We are building an independent, open library of hempcrete research, field tests and honest building guides — so the next generation of natural builders can learn without a paywall. Sponsoring a “living wall” is a voluntary contribution that puts a real stake in the future of sustainable building.
Every Gift Builds a Wall
Your contribution funds free hempcrete research, real-world field tests and the open guides we give away to builders, students and off-grid families.
Official Tax Deduction
Because Phelix is a fully registered Canadian charity (CRA #752990952RR0001), your gift generates an official tax receipt sent instantly to your inbox — returning up to 50% at tax time.
registered Canadian charity · official tax receipts issued instantly by email · every dollar builds the movement
HEMPCRETE QUESTIONS, ANSWERED
What Every New Hempcrete Builder Wants to Know
Is hempcrete strong enough to build a house?
Hempcrete is an infill insulation, not a structural material. You build a timber, steel or stud frame for strength, then cast hempcrete around it. The result is a strong, weather-tight wall that insulates and regulates humidity far better than plain concrete.
What basic hempcrete mix ratio should I start with?
A common starting point is roughly 1 part lime binder to 1.5 parts hemp hurd by volume, then water to a damp, workable consistency. The guide walks through tuning this for walls, floors and roof insulation so you hit the right density every time.
Does hempcrete work in cold climates?
Yes. Its permeability and thermal mass make it excellent for cold climates when detailed correctly. The ebook covers moisture management, drying potential and wall build-ups designed for freeze-thaw conditions.
How much does DIY hempcrete cost per square foot?
Material cost depends heavily on local hemp hurd and binder prices, wall thickness and whether you cast it yourself. The guide breaks down how to cost a project from the materials up so you can budget before you build.
Why is hempcrete called a carbon-negative material?
Hemp absorbs carbon as it grows, and the lime binder re-absorbs CO2 as it cures and hardens. Over its life a hempcrete wall can lock more carbon than it emitted, making it one of the few truly carbon-negative building materials.
FREE DIGITAL DOWNLOAD
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The Hempcrete Builder’s Bible is a free educational guide. Hempcrete is a non-structural insulation material — always have your structural frame and building details reviewed by a qualified engineer or building professional.
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