+44 (0) 1723 502 440 sales@firthsheetmetal.com

Quality Products, Excellent Service

One of the only companies in the UK certified to supply and install Flameshield and Duraduct

Diverse Body of Customers

Serving hospitality and catering industries, airports, schools, nightclubs and bars, casinos, hospitals, and retailers

DW144 Ductwork

All our products are manufactured to the highest standards, in-line with DW144 specification for sheet metal ductwork. All sections are produced with an integral continual girth flange from one complete section of steel sheet. This delivers strength and quality far beyond the requirements of DW/144.


We are one of only a few UK companies licensed to manufacture Flameshield fire rated ductwork, compliant to BS 476 part 24. This is a non-coated, certified fire-rated ductwork system made from galvanised sheet metal on our dedicated machinery, which delivers performance and reliability expected of a leading brand.

Duraduct Lt®

We are one of only a few UK companies licensed to manufacture Promat DURADUCT LT,a Durasteel based fire rated product, compliant to BS 476 part 24 which provides up to 240 minutes fire resistance. This highly moisture resistant product retains integrity even when saturated, and does not absorb fluids such as cooking oil in kitchen extract systems.


At Firth Sheet Metal Ltd we can produce ductwork to customer drawings; or can provide a complete design service including, comprehensive site surveys, detailed 3D CAD drawings, and design calculations, all available for inspection if required. Our team have experience from a vast array of industries, and will work with you to provide the solutions you need.


Our 700m2 workshop is equipped some of the best tooling and machinery available, including Firmac CNC equipment, allowing our highly trained staff to provide top quality products. We pride ourselves in offering these high quality products quickly and efficiently at competitive prices.


As an accredited safe contractor we have a track record for excellence in health and safety. This is evident when working with our fully trained installation engineers. We are committed to safe and smooth installations from start to finish, and all staff have the necessary skill cards, IPAF training certificates.

Our Customers

Firth Sheet Metal

Firth Sheet Metal Limited has been providing tailored, expert service in the sheet metal and ductwork industries for nearly sixty years. We will be with you from the beginning to the end to address your specific project needs and are one of only a handful of companies in the country licensed to supply and provide Flamesheild and Duraduct products. We work on small-scale and large-scale projects, from garages and workshops to the country’s leading construction companies. Our engineers provide consultation, support, and advice from day one. We provide:

  • Installation services nationwide
  • Bespoke products and designs, liaising with customers to provide design support with CAD or working with designs provided by customers
  • Manufacturing solutions for private and commercial customers. Includes plasma cutting facilities. Ductwork straights and fittings manufactured with rolled on flange using Firmac CNC equipment
  • Commissioning to ensure appropriate airflow

Our services are provided by highly trained experts in sheet metal and ductwork. Our specialties included standard and fire-rated ductwork, fans, ventilation systems, general ventilation, ammonia extraction, and kitchen extraction.

Our specialist team can provide tailored advice and flexible solutions to see your project through from design to installation. We have delivered major construction projects throughout the UK to exacting standards, including working with the country’s top mechanical engineering companies. Our bespoke systems include specialist sheet metal work, spray booths, dust and fume extraction (from welding to woodworking).

Are you worried about fires in the public areas of your workplace? Then choose one of our certified fire-rated ducting systems, Flameshield or Duraduct LT. Our professionals are uniquely trained and qualified to deliver both systems, and our specialist expertise in world-class design, manufacturing and fitting makes us one of the few approved installers and suppliers in the country.

We also provide services on a smaller scale. Having our own fully equipped 700m2 workshop means we can guarantee quick turnaround without relying upon external suppliers. Our holistic approach combines design, manufacture, and installation onsite to provide tailored solutions. Some of our happy customers have included leisure facilities, retail environments, care homes, campsites, hotels, hospitality services, pharmaceutical and food industries.

Firth Sheet Metal Ltd supplies AMG with both standard and Flameshield® fire-rated ductwork. Service and delivery of orders is excellent – even at extremely short notice. The quality of the ductwork is second to none and is provided at a very competitive price.

Andrew Garton

Managing Director, AMG Sheet Metal

Do you want to find out more about Firth Sheet Metal Ltd.'s services, designs, and experience?

Then contact us to speak with one of our expert, licensed professionals. We provide support at every stage in your project’s completion, from advice and consultation to design, manufacture, installation, and airflow evaluation.

Support within the Local Community

The Firth-Firmac group has proudly sponsored a board at Scarborough Athletics’ Flamingo Land Stadium in a two-year deal. This is the home ground of Scarborough Athletic football club who play in the Northern Premier League Premier Division.

We feel it imperative that where possible, during this finiancially unstable period the effects of COVID-19 have caused, that businesses like ourselves support their local clubs & communities.

Having worked with Firth Sheet Metal for some time on a variety of projects, I have been extremely pleased with both product quality and the standard of work. The initial site survey, detailed drawings, and project management, all lead to a first class installation.

Robert Patrick

Senior Project Manager, GEA Refrigeration UK Ltd

We have been using the services of Firth Sheet Metal for over 20 years. Our experience and reason for the continued use of the services provided by Firth Sheet Metal is largely down to their professional approach to the manufacture and installation of their ductwork, along with a keen eye on health and safety.

David Hayhurst

Design Manager, SPIE Environmental Engineering