How do you build a roof top garden?

you can't but you can go on top of the coffee shop by clicking on the cat picture :p You can get on top of Bearville Outfitters by jumping on the trampoline in the street to the right of BV...

You can't go on top of your rooftop unless you purchase a rooftop at Lumbear Yard.

i do

Plants and soil very effectively shield roof surfaces from absorbing heat and the cooling effect that roof gardens have, can considerably reduce energy utilization. A cooler building is far less...