If you are using a dark color you have a better chance of breaking the glass.
If the glass is dry set in metal or in a crappy wood frame, it could break if it has had any prior stressing or nicks in the edges.
If it is tempered and in a good binding, go for it.
With any glass flooding (covering w/ vinyl) goes a caveat to the owner/tenet that they are responsible for the outcome, good or bad.
I've done plenty of them in central FL. The only ones that seem to break are on old buildings or absurdly large panes.