BriggsAmasco is UK’s leading national commercial roofing company. The largest roofing company in UK. Roofing your World Since 1865. William Briggs established his own roofing company in Arbroath in 1865, he founded an asphalt works in the same year and was appointed agent for the original Limmer and Trinidad Lake Asphalt Company. He steadily expanded the business based on technical expertise and service to the customer and in 1900 William Briggs and Sons Ltd was registered as a limited company. Since then BriggsAmasco continues to grow and look to the future based on the tradition of technical expertise and customer service. Today BriggsAmasco is part of the international IKO group who are one of the world leaders in waterproofing, with manufacturing plants in the USA, Canada and across Europe. In the UK the group companies manufacture and supply a complete range of Bituminous, Mastic Asphalt, Single Ply, Liquid Roofing and ancillary products to the roofing market all of which are installed by BriggsAmasco.