Mel! what's up?

There doesn't seem to be a whole lot of action in this forum...

I can't say whether your garage/building is built strong enough for building and putting raised beds on!? But from my knowledge of having a one car flat roof garage many moons ago. I never gardened on it, but he is my 2 cents...

I myself wouldn't put raised beds on it, seems to me like alot of weight in one place all the time. If I was to utilize the roof I would go with a few containers ie 5 gallon buckets ( tomato's or peppers etc ) A) they can be moved around B) and or taken off if needed without disturbing your plants! The down side imh would be; A) Wind! would want to make sure your containers don't get blown over or OFF the roof and B) might want to put some kind of white ground clothe down to reflect the heat! That tar or asphalt shingle like to absorb heat and you might find yourself watering 3 or more times a day if you aren't using swc's.

Well that's my opinion.. goodluck to you ya if you procede with your 'green roof'.

I would go with those plastic window boxes and use a lightweight planting medium (perlite). Make sure the containers have feet so the rain can drain and not cause the roof to rot.