KPC has manufactured precast concrete window sills since the late 1960′s. In fact, we have one of the largest ranges of window sills in Europe. Bay sills, corner sills or wide face sills? You're sure to find a style that suits your requirements. We have window sills for every type of build, whether it be block, brick or timber-frame. You'll find the stooled or non-stooled window sills you need at KPC.