Product · Building Envelope
Product · InnDex 62 · Evidence provided · High specification risk
Hemp bast fibre corrugated cladding panels with bio-resin binder; low-embodied-carbon external finish.
BastWave panels are corrugated external cladding sheets (1150×1050×3mm) manufactured from locally grown hemp bast fibre bonded with bio-resin. The product addresses the AEC sector's demand for renewable, low-carbon cladding alternatives to conventional fibre cement or aluminium. Margent Farm grows and processes the feedstock in-house; the panels have been specified and installed on the Young V&A refurbishment (2023–24), demonstrating commercial-scale manufacturability and site delivery.
BastWave panels are corrugated external cladding sheets manufactured from locally grown hemp bast fibre and bio-resin at Margent Farm, which controls the crop-to-panel supply chain in-house — a vertical integration that reduces transport steps and ties embodied carbon performance to a domestic agricultural cycle rather than global commodity flows. The Young V&A refurbishment specification (2023–24) is a credible reference: a heritage-sector project at scale with a demanding client, confirming that the product can be manufactured, delivered, and installed on a live contract. The bio-resin binder durability under long-term external UV exposure is the highest-severity open question — there is no established 10-year weathering record for this formulation, which means specifying it as primary cladding carries a durability risk that cannot be fully priced at design stage. Published data on fire rating, moisture vapour transmission, and thermal transmittance appear absent from the record, which will complicate Building Regulations compliance routes in most jurisdictions. The corrugated profile constrains design vocabulary, and single-source supply from one farm introduces supply-continuity risk that a traditional cladding procurement would not carry. The product is worth a closer look for low-rise or heritage contexts where the embodied carbon and renewable narrative is genuinely valued by the client — but the procurement team should build in a supplier resilience question and the design team should confirm compliance data before specifying in an exposed, high-wind or coastal environment.
Deployment confirmed at Young V&A (credible institutional reference). Physical properties (dimensions, weight, composition) verifiable from product spec. However: no Environmental Product Declaration (EPD), Life Cycle Assessment (LCA), or third-party carbon quantification published. Carbon-substitution narrative is entirely qualitative—no comparative data vs. conventional cladding (e.g., PVC corrugated, fibre cement, metal). No fire ratings, weather durability data, or maintenance schedules disclosed. Samples listed as sold out at review date (stock volatility flag). Bio-resin binder composition not specified—type and source material unknown. Price point (£57/panel) lacks context: no installed cost, labour, or lifecycle cost data available.
#bio-based_cladding #embodied_carbon_reduction #renewable_fibre #corrugated_sheet #exterior_finish