A-Rated Tilt and Turn Windows – Pilkington Glass. Casement windows · Flush casement windows · Tilt and turn windows Triple glazed window available increasing the energy rating to ‘A’ Ratings or Rated. Our VEKA range of energy rated tilt and turn uPVC double glazed windows feature choices of market leading Pilkington or Planitherm low-e glass units and are internally beaded secure supplied and fitted,