Neath Port Talbot If you are looking for the highest quality PVCu double glazing windows with a complete before and after sales service then MPN Windows is the company for you. We will be happy to manufacture and install or repair double glazing for your home and conservatory in NPT. We have a wide range of products including windows, doors and all necessary accessories which are sure to meet with your satisfaction. All our work and products are covered by our unique 10 Year Insurance Backed Guarantee which covers the whole product from us including the PVCu frame, Double Glazed Sealed Units, Handles, Hinges, and Locks.