First out, my question pertains strictly to screenplays. Secondly, it deals with a spec script. Now, there seems to be surprisingly scant information on the internet in regard to how far you should go in describing a locale.
I'll throw you an example. If I intend on describing a building from the 'EXT', should I specify the colour of the walls and the number of storeys? Can I go even further to describe its skeleton and the shape it cuts?
How much is too much? Further, would it be superfluous to mention stuff like the frame of the windows and other things of the like?
Your answer will be all the more appreciated if you could cite examples and/or sources.