Fibreglass Flat roof?

Thinking of replacing our garage flat roof and converting it into a room , has to stay as a flat roof, have been looking getting a Fibreglass Flat roof, just would like to know if anybody
could recommend this type of roofing if the got if done or to get something else? thanks in advance

it may not be of uch use if you want a room- but i am getting a carpenter in to replace the roof of a shed and converting it to clear fibreglass- it's corrugated stuff and is hard enough to walk on...

i think something to look out for is how transarent it will be after 10 or 15 years and how shatter proof or strong it is. and what sort of hue comes through it- blue or green are my options...