Retrofitting by the inside with hemp blocks.

Why retrofit and insulate with hemp blocks from the inside ?

Comfort, breathability, and performance: hemp blocks adapt to all renovation projects.

Whether it's a listed building, a historic residence, a timber-framed house, or a stone building, they guarantee optimal interior insulation for future generations.

Their versatility meets current challenges: thermal protection, reduction of energy consumption, remarkable longevity, and low carbon footprint.

Choosing hemp blocks means opting for insulation that respects heritage and the environment.

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Insulating from the inside with hemp blocks, a complete solution.

A complete and easy-to-implement solution for unique interior comfort and incomparable durability:

Hemp blocks: Choose from a wide range of thicknesses from 7 to 36 cm.
HL Mix: Fill the irregularities of your old walls with our insulating plant-based granulate.
Lintels: Facilitate your openings and passageways.
Finish: Choose the finish that suits you.

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A recognised and certified material.

A material recognised and certified by numerous labels and technical approvals.

The advantages of hemp blocks for interior insulation.

High thermal performance: Reduce heat loss and improve the energy efficiency of your building.
Moisture regulation: As a breathable material, hemp naturally regulates humidity, preventing condensation and mould problems while preserving old buildings.
Acoustic comfort: Enjoy superior sound insulation for a peaceful indoor environment.
Bio-based and durable material: Made from renewable raw materials, hemp blocks are part of an ecological and sustainable construction approach.
Easy implementation: Their lightness and size facilitate quick installation, ideal for renovation sites.
Exceptional lifespan: A lifespan of 150 years, which is 6 times longer than conventional insulation.

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The technical performances of a renovation with hemp blocks.

Hemp blocks ensure excellent thermal regulation thanks to their ability to absorb and diffuse heat. This helps maintain a constant indoor temperature, limiting variations due to external conditions.

Key technical data :

Lambda value (λ): 0.071 W/mK
Thermal resistance (R): up to 5.37 m²K/W for 36 cm blocks.
Thermal phase shift: up to 23.6 hours for 36 cm blocks, reducing the impact of temperature variations.

Thanks to their permeability to water vapour, hemp blocks naturally regulate humidity, creating a healthy and consistent indoor environment.

Key technical data :

Water vapour resistance factor (μ): 2.8.
Equivalent diffusion thickness Sd: up to 1 m for a 36 cm block, promoting wall breathability.

Hemp blocks offer remarkable acoustic insulation, effectively absorbing and attenuating noise, for a quieter indoor environment protected from sound pollution.

Key technical data :

Acoustic absorption (α): Coefficient of 0.85 (high sound absorption).
Acoustic attenuation (Rw): up to 44 dB for a 36 cm block, significantly reducing external noise.

Hemp blocks are highly fire-resistant, emit no toxic fumes, and offer increased safety in case of fire.

Key technical data :

Fire resistance: from 240 minutes for blocks of 30 cm or more to 45 minutes for 7.5 cm blocks.
Fire reaction class: B, S1, d0. The hemp block does not emit toxic fumes or flaming droplets.

Hemp blocks are the epitome of a sustainable solution, combining remarkable longevity with a reduced environmental footprint. This bio-based material ensures reliable and environmentally friendly construction.

Key technical data :

Bio-based and low-carbon material: Hemp is a renewable resource that helps reduce CO₂ emissions during construction.
Exceptional lifespan: Thanks to their robustness, hemp blocks maintain their performance for decades without needing replacement.

Implementing hemp blocks in interior retrofitting.

Time-saving: Implementation is faster than with loose-fill insulations or systems requiring a framework.
Thermal bridge management: Thanks to their moisture-regulating capacity, the thermal weaknesses inherent in interior renovation projects are perfectly managed, unlike conventional insulations.
Stability and durability: The performance of hemp blocks remains constant over time, without settling or degradation.

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