Terracotta glazing is enjoying a revival. It was used extensively at the beginning of the last century, and is proving popular at the start of the 21st. Specifying it is not always straightforward, though, as architect Kohn Pederson Fox found out when it tried to recreate an 80-year-old mottled glaze for a building in the City. Also this month, we examine the performance and lifetime costs of render and check out curtain walling standards emerging from Europe and the Centre for Window and Cladding Technology. Finally, we showcase the latest cladding products to hit the marketplace and look at how green-fingered designers can add plants to their specification without destroying the fabric of the buildings.