The deal almost doubles £9m turnover Western Thermal’s workforce to around 250 and opens links to major pharma, food processing and petrochemical clients.
HSS was originally formed as PSL in 1988 prior to a merger in 2009 with the site engineering division of Henderson Process Systems.
Its headquarters in Blaydon on Tyne dovetails with Western Thermal’s regional office hubs in Milford Haven, Leeds, Stroud, Chorley and London.
HSS is a preferred supplier for companies such as Nestle, Proctor & Gamble, Star Refrigeration, GlaxoSmithKline and Tetrapak.
Trevor Horsley, founder of Western Thermal, said: “The HSS acquisition adds to Western Thermal’s already fast-growing business and, being entirely complementary in its skillset, represents a great step forward in terms of deliverability to the major industry players.”
Joe Henderson, who has been at the helm of Henderson Site Services since inception, said: “The unified power of Western Thermal plus HSS is a great example of where a combination is greater than the sum of the parts with the enlarged company able to offer pipework, thermal insulation, ducting and fire-stop engineering solutions for any project.”