Located in the heart of Kilkenny city, and established in 1943 by George Pennefather, Butler Gallery is a vibrant contemporary art gallery, in the historic Evans’ Home, and offers one of the finest exhibition spaces in Ireland. All glass provided is our Slim-Glaze range. Heritage style units starting at 12mm overall thickness, which means the old style look can be re-created while the thermal efficiency benefits of our super slim double glazing can be even better than standard double glazing, achieving U-values (the term used to measure thermal efficiency) of as low as 1.2 on a 6mm cavity and 1.1 on a 8-cavity depending on the type of gas used.