Before the plants go up a structural engineer should check to ensure that the roof can support the weight of the engineered growing medium and plants.
Green roof system for shed.
Green roofs are made up of several layers typically a waterproof root barrier layer to protect the roof a drainage layer water retention mat then the growing medium and vegetation.
Step 1 check if it is load bearing.
Even a flat roof should have some pitch so that it sheds water toward gutters.
For a green roof installation that pitch should be at least inch per foot of run.
Waterproof first a layer of waterproofing needs to be added to your shed or garage.
For plants to flourish on a green roof they will need moisture and drainage which means soil and a sturdy framework to keep it in place.
For a first green shed roof i would recommend that you start off relatively small.
You will also need to make sure that your shed s roof is waterproof.
And also so you can find out what works for you.
Ideally a green roof will go on a slope up to 10 but if it s on a slope over 20 make sure you have a frame to stop the green roof from slipping.
Check that your shed is strong enough to take such weight and remember that the walls will also play a large part in bearing the load.
Enough to support the roof build up which comprised.
Building a green roof on your shed is a way to add interest to the shed and produce a new area to cultivate.