Good afternoon Andy, We do a frameless and traditional roof lantern We can make one lantern to give the wow factor at 1.5m - 3m, structurally bonded with no metal frame or a more conventional large lantern. These will come with noise reduction glass, solar reflective glass and a self-cleaning coating. If you want to look at more photos or a quote, please contact us, thank you. 1st Folding Sliding Doors

Opening lanterns are tricky and expensive IME. If you want it opening I’d pick a skylight - but make sure it’s frameless from the inside, that’s a very contemporary look. I don’t understand why a lantern would let in more light, assuming the hole in the roof is the same size either way.

Did you go ahead with this work and what glass did you go with? having work done to create a playroom in a north facing garden too. going with a combination of tiled and glass roof, just need to decide on which kind of glass ? blue for better temperature control or neutral.

Thanks, this is exactly what we've decided to do 👍🏻