Building a green roof on your shed is a way to add interest to the shed and produce a new area to cultivate.
Green roof system for shed.
When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot.
Green roof installation guide.
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.
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.
It is always best when buying a shed for this purpose to go for a reinforced shed.
When fitting a green roof to a shed make sure that your shed roof can take the increased weight load from a green roof.
For a first green shed roof i would recommend that you start off relatively small.
Even a flat roof should have some pitch so that it sheds water toward gutters.
There are some things you need to check before building but the job is not very difficult.
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.
Alternatively you can reinforce and brace the internal shed structure and roofing joists before fitting.
For this shed i used 3x2 softwood timbers at 600mm 2 ctrs which spanned 1 2m 4 with an 18mm 3 4 plywood deck.
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.
Enough to support the roof build up which comprised.
Step 1 check if it is load bearing.