Canathas Systems Ltd

Canathas Systems Ltd, based in County Tipperary, is developing a load-bearing hemp-lime building block built on a Portland-free, GGBS-activated binder system, engineered for the Irish and UK construction markets and carbon-negative by design. The block combines a GGBS-lime binder matrix with a treated hemp shiv core, featuring a proprietary densified interfacial zone intended to overcome a known weakness in hemp-binder composites. The company reports carbon-negative results across all mixes tested, with no Portland cement used. It is progressing through patent filing, compression testing, accredited confirmatory testing, and plans for NSAI Agrément or ETA certification under the Modern Methods of Construction framework. The company is engaging with testing partners and binder suppliers, with binder ratios and formulation specifics confidential ahead of certification.