Thermseal Windows is a family-owned company that strives to be the premier provider of home improvement services, producing high-quality double glazing. Whether you are looking to put the finishing touches on a dream property or are undergoing a complete refurbishment – or anything in between – we are here to help with a dedicated team of experts. We provide the very best option for double glazing in and around Oswestry and Wrexham for anyone looking to maintain a current style, try something new, or simply take advantage of the latest in security and home efficiency. Whatever the age or style of your home, we have a window to suit you.