We recently had our double glazing windows serviced by munster joinery. I was surprised to learn that our 9 year old windows can be upgraded to 24mm triple glazing. This involves replacing the glazing and where necessary the hinges and seals.
I belive there would be an improved thermal comfort experience. But I will have do some.more research before we make a decision. The no.mess and fuss of the.upgrade makes it very attractive.