Installers of UPVC Windows Swansea SA1. MPN The company offers genuinely free, no-obligation quote with no pressure selling for Swansea customers. The Window Company is a family run business installing UPVC windows Centre Swansea and County, UPVC doors, conservatories and roofline. Get a free quote price and costs for Swansea SA1 Veka A-Rated windows and home improvements.