JNJ Window & Door Maintenance is a company based in Central Scotland that specialises in the maintenance and refurbishment of UPVC, timber, aluminium, and composite windows and doors. We offer a wide range of services to ensure the optimal performance and longevity of these types of windows and doors. With our expertise and experience, JNJ Window & Door Maintenance provides high-quality maintenance and refurbishment services to our customers. Whether it's UPVC, timber, aluminium, or composite materials, we have the knowledge and skills to cater to the specific needs of each type of window or door.