Why retrofit and insulate with hemp blocks by the outside ?
IsoHemp hemp blocks offer a breathable and high-performance solution for all your external renovation projects.
By creating a durable external envelope around the entire building, you optimise energy efficiency without limiting your choice of finishing options.
The blocks are placed on the existing masonry or foundation and provide an excellent base for a high-quality aesthetic finish.
Insulating from the outside with hemp blocks, a complete solution.
A complete and easy-to-implement solution for unique interior comfort and unparalleled durability:
- Hemp blocks: Opt for an extensive range from 7 to 36 cm thickness.
- Lintels: Facilitate your openings and window passages.
- Various finishes: Choose from a wide range of aesthetic finishes: mineral renders, cladding, bricks, or brick slips.
A recognised and certified material.
A material recognised and certified by numerous labels and technical approvals.
The advantages of hemp blocks for external insulation.
- Elimination of thermal bridges: Remove thermal bridges for optimal energy efficiency.
- Addition of thermal mass: Increase the building's capacity to store and release heat, ensuring thermal comfort all year round, both in summer and winter.
- Ease of application: Easy and quick implementation, ideal for renovation projects.
- Impact resistance: Hemp blocks offer excellent resistance to shocks (ball, ladder, etc.).
- Simplified object fixing: Gutters, lights, shutters can be fixed directly onto the hemp block.
- Durable and quality materials: Opt for a sustainable and bio-based solution with exceptional longevity that enhances your property.
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 :
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Lambda value (λ): 0.071 W/mK
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Thermal resistance (R): up to 5.37 m²K/W for 36 cm blocks.
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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 :
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Water vapour resistance factor (μ): 2.8.
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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 :
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Acoustic absorption (α): Coefficient of 0.85 (high sound absorption).
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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 :
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Fire resistance: from 240 minutes for blocks of 30 cm or more to 45 minutes for 7.5 cm blocks.
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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 :
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Bio-based and low-carbon material: Hemp is a renewable resource that helps reduce CO₂ emissions during construction.
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Exceptional lifespan: Thanks to their robustness, hemp blocks maintain their performance for decades without needing replacement.
The implementation of hemp blocks in external retrofitting.
- Time-saving: Implementation is faster than with loose-fill insulations or systems requiring a framework.
- Management of thermal bridges: Thanks to their moisture-regulating capacity, the thermal weaknesses inherent in internal renovation projects are perfectly managed, unlike conventional insulations.
- Stability and durability: The performance of hemp blocks remains constant over time, without settling or degradation.
Technical documentation.
Find here all the technical resources you need to better understand external insulation with hemp blocks and its specifications.
Installation guide - Hemp Blocks - IsoHemp
Hemp blocks for naturally efficient masonry , Hempcrete, Complementary products for hempcrete blocks.
Installation guide
Folder - Application guide - IsoHemp
Hemp blocks for naturally high-performance masonry, Hemp concrete, The Hempro system for 100% hemp construction.
Folder
Folder - Renovation - IsoHemp
Hemp blocks for naturally efficient masonry , PCS, our natural interior plaster, Complementary products for hempcrete blocks.
Folder
Technical Approval - ATG
The Technical Approval ATG, issued by the UBAtc, is a certification that confirms our products meet the highest standards of the Belgian market.
Technical data sheet
Technical data sheet - Hemp block - IsoHemp
Hemp blocks for naturally efficient masonry.
Technical data sheet
Other sections and schematic diagrams are also available upon request.
Do you have any other questions? Contact us!
Each project is unique.
Contact us to define the most suitable solution for your renovation.
Our team is at your disposal to advise you and together find the ideal solution.
Our achievements in retrofitting by the outside.
Discover our projects successfully completed thanks to IsoHemp hemp blocks in external insulation.
