August 14, 2025

Episode 7: Dr Aled Roberts (Dekiln) - Creating the World’s Most Sustainable Tiles

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Dr. Aled Roberts, Founder of Dekiln, discusses kiln-free ceramic tile manufacturing and the path to scaling sustainable materials on Episode 7 of Scaling Green Tech, a podcast by Adopter.

Roberts developed Dekiln's technology during COVID-19 lockdowns, working in a basement with waste gypsum plaster and a plant-derived binder. The result is a ceramic-like tile produced without kiln firing, with a 94% lower carbon footprint than conventional tiles. The material is more than 98% recycled gypsum plaster sourced as industrial waste. Because it is never fired, it avoids particulate emissions, eliminates energy-intensive spray drying, and removes the dimensional shrinkage that causes rejects in standard production. Dekiln is targeting B3 classification for indoor wall tile applications and is working towards a licensing model with existing tile manufacturers.

This episode is relevant for materials science founders, hard tech investors at pre-seed and seed stage, built environment developers, sustainability leads in construction procurement, and architects sourcing low-carbon tile alternatives.

Guest Profile

Dr. Aled Roberts is the Founder of Dekiln (formerly Deakin Bio), a materials startup developing kiln-free ceramic tile technology. His background is in porous materials chemistry and battery science. Postdoctoral research included work on lunar and Martian construction materials - a project that shaped his approach to constraint-driven innovation. He developed the Dekiln technology independently during COVID-19 before formalising the company through a partnership with Frontier IP.

Dekiln is an early-stage deep tech startup developing novel tile materials using recycled gypsum plaster waste and a plant-derived binder, pressed and dried without kiln firing. The company is currently at Technology Readiness Level 4, producing approximately one square metre per day, and is targeting pilot-scale production for licensing to existing tile manufacturers.

Dekiln website

Dr Aled Roberts LinkedIn

Key Takeaways

  • Dekiln's kiln-free process reduces the carbon footprint of ceramic tiles by 94%, by eliminating the fossil-fuel-intensive firing step that accounts for 30% of standard tile production costs.
  • More than 98% of Dekiln's tile material is recycled gypsum plaster - a construction waste product that manufacturers typically pay to dispose of.
  • Because Dekiln tiles are never fired, they experience no dimensional shrinkage or warping during production. This reduces rejection rates and enables consistently sized tiles that require less grout on installation.
  • Conventional ceramic production includes a wet milling and spray drying step - an energy-intensive process that adds water, then burns fossil fuels to remove it. Dekiln's dry milling process eliminates this entirely, generating 99.9% lower particulate emissions.
  • Dekiln is developing bio-based surface coatings through a collaboration with the Henry Royce Institute's CEAMS programme, to meet B3 surface hardness and abrasion resistance requirements.
  • Dekiln's commercial strategy centres on licensing its process to existing tile manufacturers. Because the process is compatible with existing production equipment, manufacturers can adopt the technology without replacing infrastructure.
  • Dekiln's production capacity has increased by approximately 1,000 times since lab-scale development. The current output is around one square metre per day, with a target of 1,000 square metres per day at pilot scale.

FAQs

  1. What is Dekiln's tile material made from? 

Dekiln's BioSintering® technology produces next-generation tiles composed of more than 98% recycled gypsum plaster. This is the waste generated when ceramic factories discard used plaster moulds, or when buildings are demolished or renovated. It is combined with a plant-derived binder currently being patented. The result is a pressed, dried tile that does not require kiln firing to harden.

  1. How does Dekiln achieve a 94% reduction in carbon footprint? 

Most carbon emissions in conventional tile production come from kiln firing, which burns large volumes of natural gas to fuse clay into a solid material. Dekiln replaces this with a low-temperature drying step. It also removes the wet milling and spray drying stages used in standard production, both of which are energy-intensive. The combined effect is a 94% reduction in carbon footprint.

  1. What is B3 classification and why does it matter for Dekiln? 

B3 is a performance classification for ceramic tiles used in indoor, lower-wear environments such as internal walls. Achieving B3 certification allows Dekiln to sell into standard commercial and residential applications without requiring buyers to accept a non-standard product.

  1. How does kiln-free production affect tile design possibilities? 

Because Dekiln tiles are not fired, they can incorporate materials that would be destroyed at kiln temperatures. Natural pigments - including colours historically dependent on now-banned compounds like cadmium or lead - can be added directly. Physical elements such as pressed flowers or fishing nets can also be embedded. The absence of shrinkage also makes the material compatible with 3D printing for complex shapes, which Roberts confirmed has been tested at proof-of-concept stage.

  1. What is greenwashing and why does Roberts see it as a competitive problem? 

Roberts describes greenwashing as highlighting the sustainable aspects of a product while obscuring parts of the supply chain that are not. In competitive environments like grant funding and early investment, greenwashing companies can appear more attractive than genuinely green alternatives. He also notes that tightening green claims regulation will create structural problems for businesses that have built greenwashing into their model.

  1. What is Dekiln's route to market? 

Dekiln is targeting a licensing model rather than building its own factories. The process is designed to be compatible with existing ceramic tile production lines - press, dry, and coat - so manufacturers can adopt the technology without replacing equipment. Manufacturers switch off kilns, reduce gas costs, and cut CO2 emissions while continuing to use existing production capacity.

Topics Covered

  • Explaining ceramic tile production to a non-technical audience
  • The kiln firing step and why it drives carbon emissions in ceramics
  • Dekiln's four-stage production process: grind, mix, press, dry, and coat
  • Material performance: B3 classification, strength, and surface properties
  • Recycled content and the gypsum plaster waste stream
  • Bio-based coatings and the Henry Royce Institute CEAMS collaboration
  • Greenwashing in green tech and the impact of incoming regulation
  • Scaling from lab to pilot: Technology Readiness Levels and the path to 1,000 m²/day
  • Licensing strategy and working with existing tile manufacturers
  • Industry resistance to change in the ceramics sector
  • The founder journey from battery PhD to COVID basement discovery to Dekiln
  • Advice for scientist-founders on investment, pivoting, and team-building

Related Content

Episode 5: Rhea Dabriwala and Naveen Shivalingam (Ground Up) - Turning Agricultural Residue into Climate Solutions

Episode 2: 6 Types of Greenwashing Every Green-Tech Startup Should Avoid

Green Claims Without Greenwashing: How to Communicate Your Message Responsibly  

About Scaling Green-Tech

Scaling Green-Tech by Adopter is a podcast for people shaping the future of climate technology - founders, investors, and ecosystem leaders at the forefront of adaptation and resilience solutions. As part of Adopter’s mission to accelerate the adoption of high-impact climate innovation, the podcast aims to amplify real voices and practical insights that can help others navigate the startup journey. These conversations go beyond the hype to bring real, unfiltered stories - the wins, the roadblocks and everything you need to know in between.

Read the full transcript here
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