Hirwaun (Welsh “Long Meadow”) MPN is a supplier installer serving the village and community at the north end of the Cynon Valley in the County Borough of Rhondda Cynon Taf, South Wales with Double Glazed Glazing. Find more about MPN Windows Double Glazing Installers near Hirwaun, get reviews, contact details and reviews for your local tradesmen. Request a quote from Double Glazing in Hirwaun.