SUPERIOR BREATHABLE BUILDING SYSTEM
Combining Hemp Blocks, Gramitherm Insulation, Lemix Clay Panels and Natural Lime & Clay Coatings to create healthier, more comfortable and energy-efficient buildings.
WHY THESE MATERIALS WORK TOGETHER
IsoHemp Blocks, Gramitherm grass Insulation, Lemix Clay Panels and Natural Clay Coatings each perform an important role, but together they create a superior breathable wall system that regulates temperature, controls humidity, improves acoustic performance and supports healthier indoor air quality
ISOHEMP HEMP BLOCKS
Provided thermal mass and natural vapour permeability, helping regulate moisture while creating a duarable and energy-efficient building envelope
Gramitherm Insulation
Natural grass fibre insulation that improves thermal performance, acoustic comfort and moisture management without trapping humidity
Lemix Clay Panel
Lemix clay panels combine natural moisture regulation, thermal mass and outstanding acoustic performance. They help create quieter, healthier indoor spaces by absorbing excess humidity while reducing sound transmission and echo within the building
Interior Clay Coatings
Interior clay coatings are the final component of a breathable wall system. They help manage indoor humidity, reduce condensation risk and support healthier indoor environments while providing a durable natural finish that compliments high-performance building design
BLACK MOULD & MOISTURE CONTROL
90% Humidity Outside Doesn"t Mean 90% Humidity Inside
High Humidity and trapped moisture create the ideal conditions for condesation and black mould. Breathable wall systems help regulate moisture naturally by allowing water vapour to move through the building envelope trapped in the wall. The result is s healthier indoor environments and improved comfort and long-term building durability
Controls Indoor Humidity Naturally
Reduces Condensation Build -up
Hemps Reduces Black Mould Risk
Supports Healthier Indoor Air Quality
THERMAL LAG & WALL SYSTEM PERFORMANCE
One of the greatest advantages of breathable building systems is thermal lag — the ability of a wall assembly to slow the movement of heat through the building envelope.
By combining IsoHemp Hemp Blocks, Gramitherm Insulation, Lemix Clay Panels and Natural Clay Coatings, these wall systems help maintain more stable indoor temperatures throughout the day and night, reducing temperature fluctuations and improving year-round comfort.
The result is a building that remains cooler during hot summer days, warmer during winter periods and less reliant on mechanical heating and cooling.
Performance Criterior OPTION 1- 294mm Thick Wall OPTION 2- 404mm Thick Wall​External Finish 20mm Lime Render 20mm Lime Render
Hemp Block 150mm IsoHemp 200mm IsoHemp
Structural Frame 90mm Timber Frame 150mm Timber Frame
Insulation 80mm Gramitherm 150mm Gramitherm
Internal Lining 22mm Lemix Clay Panel 22mm Lemix Clay Panel
Internal Finish 10mm Clay Plaster 10mm Clay Plaster
Total Wall Thickness Approx. 294mm Approx. 404mm
Moisture Regulation Excellent Excellent
Vapour Permeability Highly Vapour Permeable Highly Vapour Permeable
Estimated Acoustic Performance Approx. 60–63 dB Approx. 63–66 dB
Estimated Thermal Lag Approx. 12 -14 Hours Approx. 16-20 Hours
Indoor Comfort High Premium
Energy Efficiency High Premium
Black Mould Resistance Excellent Excellent
Sustainability Excellent Excellent
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OPTION 1 – 294mm WALL
A balanced high-performance wall system combining thermal mass, natural insulation, acoustic performance and moisture regulation. Suitable for residential and commercial projects seeking excellent comfort and efficiency.
OPTION 2 – 404mm WALL
Our premium breathable wall system delivering enhanced thermal lag, superior acoustic performance and maximum insulation values. Ideal for high-performance homes, luxury residences and large-scale commercial developments.
SYSTEM BENEFITS
Fully Breathable Wall Assembly
Regulates Indoor Humidity Naturally
Helps Reduce Black Mould Risk
Up To 66 dB Acoustic Performance
High Thermal Mass & Thermal Lag
Reduced Heating & Cooling Demand
Healthier Indoor Air Quality
Natural & Sustainable Materials
Thermal lag values are estimated based on wall thickness, material mass and previous testing. Final performance may vary depending on detailing, climate, orientation and construction method
WHY BUILD WITH BREATHABLE MATERIALS?
Modern buildings are often sealed tightly, trapping moisture and reducing indoor air quality. Breathable building materials work differently by allowing water vapour to move naturally through the building envelope. This helps regulate humidity, reduce condensation risk and create healthier, more comfortable indoor environments while improving long-term building performance.
Healthier Indoor Air
Allows moisture vapour to escape rather than becoming trapped within walls.
Acoustic Performance
Natural materials combined with clay systems can deliver acoustic performance up to approximately 63–66 dB.
Reduced Black Mould Risk
Allows moisture vapour to escape rather than becoming trapped within walls.
Thermal Comfort
High thermal mass and thermal lag help maintain more stable indoor temperatures year-round.
BUILDING FOR THE FUTURE
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Combining IsoHemp Hemp Blocks, Gramitherm Grass Fibre Insulation, Lemix Clay Panels and Natural Lime & Clay Coatings creates a complete breathable wall system designed for comfort, durability, sustainability and long-term building performance.