The idea of a living roof is pretty simple. Basically using the roof area as a growing medium for plants. Simple.
A living roof provides a colorful alternative to the grey urban landscape where the drab concrete is replaced by the ever changing mixes of greens. Flowers provide additional splashes of colors ,brightening up our grey boxes.
But apart from the aesthetic value a green roof provides other advantages. One can grow a small kitchen garden and herbs ( some would do quite well in our climate) There is nothing like eating fresh vegetables you grew your self. Also a green roof provides excellent insulation against cold winters and the backing hot summer sun. In fact green roofs have been used for centuries in northern countries.
Here is a few ideas abroad. Imagine looking from ones roof on a sea of green roof tops. Think about the cleaner air we would be breathing.
So way don't we see them here? The implementation is not so difficult. One could start with a small patch, a few pots with plants. So , go on. Have a go.