Artificial Grass

The roof garden is hard to maintain.  Birds bring their food and also poo onto the soil.  So weeds keep growing.  Finally, we decide to switch to artificial grass so that it requires less maintanence.  It is a lot of work to clear the grass and remove a layer of sand.  After that a layer of drainage and some wool coth.  Then the grass is lay on top.  Hopefully, it will work well.