0191 411 2633


One of UK’s most respected building industry brands
The Birtley brand has grown from its modest 1965 beginnings in County Durham to become one of the UK’s most respected names in construction design technology and product development. Currently Birtley offers: 

Supergalv Lintels
The only full product range to be fully hot-dip galvanized AFTER manufacture for exceptional durability.

Special Lintels
Custom products designed and manufactured to individual requirements in either Supergalv finish or stainless steel

Residential Doors
One of the UK’s largest ranges of classic and contemporary styles including Secured by Design and bespoke design options. 

Coatings to BS EN ISO 1461, provided from one of the most modern plants in Europe.

Comprehensive free technical support
As changing regulations make lintel specification ever-more complex, our team is here to take the problem away from builders, specifiers and lintel stockists.

A brief history of Birtley

  • 1965 – Birtley Founded
    This follows the acquisition of a small structural steel business G.T. Duncan (Birtley) Ltd by the Birmingham Small Arms Co. Ltd. The company opens for business in Mary Avenue, Birtley, on the 19th July.
  • 1967 – Lintel manufacturing begins
    Originally steel fabricators for the local mining industry and power stations, Birtley now adds steel lintels and garage doors to its product range.
  • 1973 – An acknowledged building industry specialist
    By now the building industry represents 85% of Birtley’s turnover and profit. This year the company is sold to Manganese Bronze Holdings Ltd.
  • 1979 – A move of address
    Birtley is now a leading national supplier to the building industry with depots throughout the country. The company moves to a new factory near Newcastle Airport and diversifies into kitchen furniture and galvanizing plant installations.
  • 1980 – The recession bites
    The company abandons its kitchen ambitions, but retains galvanizing. Birtley closes its new factory and returns to its original Mary Avenue site.
  • 1981 – A new owner
    Birtley is purchased by Hill & Smith Holdings PLC. The company is now back on track, and launches its Supergalv lintel and residential doors ranges. It has also built a substantial sub-contract galvanizing business serving the North East.
  • 1989 – A new name
    This year, Birtley Manufacturing Ltd becomes Birtley Building Products Ltd. This reflects the significant increase in the role the company plays within the Hill & Smith Group.
  • 1996 – Taking galvanizing to the next level
    Birtley’s brand new plant is completed and commissioned in May. It is one of Europe’s most advanced facilities for hot-dip galvanizing.
  • 2014 – The Birtley Group is born
    The Birtley and Expamet brands are brought together under the new Birtley Group banner. The group is a wholly-owned subsidiary of Hill & Smith Holdings PLC

The Birtley Group also includes:


Galvanizing and Metal Finishing Services
Coatings to BS EN ISO 1461, provided from one of the most modern plants in Europe.

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Residential Doors
Exclusive ranges for trade installers. Classic and contemporary styles including Secure by Design and Fire Door options.

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Residential Doors
Classic or contemporary ranges provided direct to the consumer and to social housing organisations.

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Metalwork, expanded metal mesh and lath, plasterers’ accessories, BAT windposts and masonry support,
Hy-Rib® permanent formwork.

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Birtley Group
Birtley, Expamet and Bowater are brands of Birtley Group, a subsidiary of Hill & Smith Holdings PLC

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Birtley Group Video

Latest News

Bowater Doors joins the Birtley Group family of brands

terry carmichael

Birtley Group Operations Director Terry Carmichael talks about the kaizen philosophy of continuous improvement.


Supporting growth across UK construction

Contact information

Birtley Group
Mary Avenue, Birtley, Co Durham,
DH3 1JF.
T: +44 (0) 191 410 6631
F: +44 (0) 191 410 0650

Further information

Privacy Policy
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Birtley Group's Modern Slavery & Human Trafficking Statement is available at: