If you are a window or conservatory installer, or your business is within the construction industry, or you are an architect working within the commercial sector, Listers would very much like to hear from you We're not just any old window and conservatory manufacturer Whether supplying our windows, doors and conservatories directly to the building and construction trades, or our building plastics range to the general public; we are focused on providing you with the very best products, service and value for money