“Operational excellence and quality customer service” has won Encon a place in a business league table in the Sunday Times.

This year Encon’s sales are up 13% to £258 million, but the rising margins since 2014 have seen profits more than triple to £13.5 million.

The Sunday Times Grant Thornton Top Track 250 League Table is now in its 14th year. It lists the top 250 private mid-market growth companies in Britain which have achieved the biggest sales by managing risk and choosing the right strategic options.

Insulation manufacturer Encon ranks 98th in the list, alongside the Stewart Milne Group, Keepmoat Homes, as well as Waterstones and Holland and Barrett.

Chief Executive Stuart Moore said: “The previous few months have been positive for our business, despite the building industry still experiencing a slight nervousness with investors and political uncertainty.

“The Encon Group will continue to face challenges with suppliers on stock availability, delivery lead times and price fluctuation. In spite of these challenges, the commitment, drive and smart decision making of our teams has enabled us to maintain growth.

“By continually improving operational excellence and quality customer service, we deliver results”.