upvc windows – Tilt & Turn South Wales. This is an ideal style window for many different types of installation as it is a very versatile window. The advantageous properties of the tilt and turn window which explains its success is that it can be opened partially for ventilation by tilting or opening fully (turning) to allow for easy cleaning of the outside panel as the entire pane can easily be accessed from inside, therefore no need to climb ladders or clean from the outside.