I know it's not a "rule", but I know what I mean.
Where is the horizontal 45° line measured from? I know it's the middle of the nearest window of the nearest habitable room, but in my case that's my neighbour's sliding patio doors, so is the starting point in line with the inside of the opening, the outside, or the glass?
Where is the horizontal 45° line measured from? I know it's the middle of the nearest window of the nearest habitable room, but in my case that's my neighbour's sliding patio doors, so is the starting point in line with the inside of the opening, the outside, or the glass?