We recieved the 12 triple glazed units back and have been fitting them in the sash window frames today. Triple glazing is similar to double glazing but has the leaded light sandwiched in the middle creating three layers of glass. This is very efficient when it comes to heating in the winter and also looks great. Although the raw texture of the glass and lead becomes more subtle, the clear glass acts as a frame and gives a different but equally interesting finish. You need to remember as well that double and triple glazed units don’t necessarily have to have horrible plastic frames. They can easily be fitted into traditional wooden frames.