Hemp Shiv is the chopped, woody core of the hemp plant, widely used as an insulating aggregate in hempcrete and lime-based internal renders and plasters. Lightweight, breathable, and environmentally friendly, hemp shiv offers a versatile, sustainable solution for both new-build and restoration projects.
Pack Size: 18kg bale
Volume: Approximately 180 litres per bale
Compatibility: Ideal for use with Roundtower NHL 2 for internal lime-hemp plasters
Applications
New Build
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In-situ casting: Hempcrete can be poured into shuttering to form non-load-bearing walls of various shapes and thicknesses
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Breathable insulation: Adds a vapour-permeable layer to floors, roofs, and walls around a softwood timber frame
Restoration
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Replaces damaged or missing infill in historic structures
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Adds an insulated internal render to stone or masonry walls, improving thermal performance without compromising breathability
Environmental & Performance Benefits
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Low-Carbon Material: Locks in carbon dioxide, contributing to carbon-negative construction
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Low Embodied Energy: Minimal energy used in hemp shiv processing
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Moisture-Regulating & Breathable: Helps maintain indoor humidity between 40–60%, reducing condensation and inhibiting bacteria and virus growth
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Non-Flammable and resistant to insects, rodents, fungi, and bacteria
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Flexible and Crack-Resistant: Accommodates movement without cracking
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Reversible & Recyclable: Hemp-lime mortars can be removed cleanly and fully returned to the earth—chemical-free and compostable
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Highly Workable: Allows for freeform construction—curves, corners, and custom wall shapes
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Sustainable Crop: Grows quickly and without the need for pesticides or chemical fertilisers
