Established in March 2019, Window Supply Company has quickly become one of the fastest growing window and door fabricators in Scotland and one of the largest in the UK, with a reputation founded upon combining market leading products with exceptional quality and service. The company's state of the art manufacturing facility is based in Whitburn UK, with trade counters located in Aberdeen, Bellshill, Dundee, Inverness, Kilmarnock, Lincoln, Livingston, Loanhead, Manchester and Sheffield. Quality Products Based at our new 105,000 square foot state of the art manufacturing facility, our team of highly skilled fabricators manufacture products to the highest quality standards. We work to the ISO 9001:2015 Quality Management System