Is there such a thing?
Have just paid several hundred £ for door blinds that were supposed to be blackout, but chap said there is no way to get 100% blackout. They have a frame around the glass, but there there is lots of light coming in around edges.
Am just about to order more blinds for son's bedroom. Is there a product on the market for tilt-and-turn UPVC windows that is 100% blackout?
TIA!