Cânhamor
100% natural, carbon-negative hempcrete (hemp + lime) blocks. First factory in the world with a full production cycle.
Manufacturer and distributor of building materials based on industrial hemp, especially hempcrete (hemp + lime), mortars, aggregates and solutions for bio-based construction. They operate from Portugal (Beja/Ourique) and work on new build, refurbishment and technical training. Their mission is to drive low carbon footprint, breathable and healthy systems. They manufacture hempcrete and hemp aggregates for construction. They develop breathable render systems, insulating fill and light panels. They promote local production cycles (growing → processing → building). They offer technical training for self-builders, architects and builders. They are one of the players driving an emerging sector in the Iberian Peninsula: construction with hemp. First and only factory in the world that controls the whole process: from hemp treatment to the finished block. New 36,500 m² factory in Garvão (Ourique) with capacity to produce the equivalent of 300 houses/month. Investment of more than 26 million euros. Since 2021, 123 houses have been built in Portugal (30 in the Alentejo) and 2 in Spain.
Because they represent the real transition towards plant-based, local, carbon-negative systems compatible with traditional techniques. They are the Iberian equivalent of the major hempcrete brands of northern Europe, but with a local focus. First hempcrete factory in the Iberian Peninsula.
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Go to their website318kg/m³
0.069W/m·K
B-s1,d0
ECObloco7 (7 cm), ECObloco11 (11 cm), ECObloco15 (15 cm), ECObloco20 (20 cm), ECObloco25 (25 cm), ECObloco28,5 (28,5 cm), ECObloco32 (32 cm). Todos en dimensiones estándar de bloque.
Aislamiento térmico y acústico de paredes (interiores y exteriores)cubiertaspavimentosrehabilitación de edificios existentesobra nueva con estructura de madera o metal. Transpirableregulador de humedadresistente al fuegoresistente a moho y plagas.
Bloque de hormigón de cáñamo (cáñamo + cal hidráulica natural), Ourique (Portugal). Carbono-NEGATIVO confirmado: GWP-total A1–A3 = −2,5 a −11,4 kg CO₂eq/m² según el grosor del muro (7–32 cm); p.ej. −10,1 a 30 cm (ficha técnica oficial, base EPD EN 15804+A2; Itecons). Densidad aparente seca 318 kg/m³, λ 0,069 W/m·K, fuego A1. ⚠️ Corregido: el GWP estaba +40/m² (signo y magnitud erróneos); por m² depende del grosor. (El titular '10.000 kg/m²' de su web es un error de unidad suyo, no usar.)
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Upgrade your listingTechnical questions and answers
- What is the carbon footprint (GWP) of Cânhamor?
- Cânhamor declares a GWP (A1–A3) of -25.083333333333332 kg CO₂e/m³ according to its verified EPD.
- What is the thermal conductivity (λ) of Cânhamor?
- The declared thermal conductivity of Cânhamor is λ = 0.069.
- What is the density of Cânhamor?
- Cânhamor has a declared density of 318.
- What is the fire resistance of Cânhamor?
- The declared fire performance of Cânhamor is B-s1,d0.
- Does Cânhamor have an Environmental Product Declaration (EPD)?
- Yes. Cânhamor has a verified EPD (EPD9475 (EnvironDEC)) under EN 15804+A2.
- Is Cânhamor a carbon-negative material?
- Yes. The biogenic carbon stored in Cânhamor exceeds its manufacturing emissions (A1–A3), according to its environmental documentation.
Values as declared by the manufacturer or its EPD. Always check the current EPD/technical sheet for project-critical calculations.
