Do Glass Verandas get hot underneath?

The simple answer is NO, they do not, at least no hotter than if you sat without the glass roof. There is usually full air flow all around a glass roof structure at either side and the front. Only on the very stillest and hottest day of the year (that single day?) you might argue some heat gets trapped underneath the glass maybe, but any heat felt is generally exactly the same as if the glass wasn’t there and is the sun just shining onto you anyway.

The glass in any glass veranda is single glazed and between 8 and 12mm thick and does not act very well as a heat or cold insulator, so the heat you feel underneath a glass veranda is pretty much the same as if you sat in the sun without the glass roof. There is the benefit of some harmful UV being filtered out by the glass itself, but the real way to have a glass veranda to use in the rain or sunshine is by having an electric retractable fabric blind fitted under the glass (or above in some cases). This will stop all the glare and intense heat like a normal awning would do for you. You can have tinted roof glass in the verandas if you really do want to prevent any glare or heat gain and are south facing but most customers opt for the retractable roof awning to control the light, glare and heat via remote control..