Munster Joinery is amongst the largest manufacturers of energy efficient windows and doors in Europe. Founded in 1973, the company has grown year on year with the continuous development of new products, materials and processes. The company has a 940,000sq ft. production facility in Ireland and another 230,000sq ft. in Warwickshire in the UK. In recent years Munster Joinery has focused on developing energy efficient products through green and sustainable processes and operations. All of the products are designed for optimal thermal performance with U-values as low as 0.47 W/m²K. Several window systems, all of which are designed, developed and manufactured in house are now Passive House certified.