For larger flatter roofs.
Green roof system for shed.
A shallow roof pitch wont allow water to drain away.
This was not flat at all but had a fall of 75mm 3 over its length of 2 4m 8.
Even a flat roof should have some pitch so that it sheds water toward gutters.
A standard shed such as the bestselling overlap apex garden shed above right or overlap pent roof garden shed is likely to fit the bill.
The smart box sedum modular advanced roof tray come as ready grown modular boxes which firmly slot together each containing its own unique water storage system and substrate ensuring easy installation and no slippage.
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Make a simple frame with the same dimensions as your shed s roof from pieces of rot proof timber using l brackets for the corners.
This gave a 1 40 slope which was enough to encourage water to drain.
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.
System with drainage and production layer.
There are some things you need to check before building but the job is not very difficult.
The slope of a green shed roof needs to be a balance between being too steep or too shallow.
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How to make a green roof.
When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot.
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.
Building a green roof on your shed is a way to add interest to the shed and produce a new area to cultivate.
You are going to be adding significant extra weight onto the shed roof so you need to know that the structure is strong enough to support it.
Step 1 check if it is load bearing.
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 green roof installation that pitch should be at least inch per foot of run.
For this shed i used nominally flat roof.
System with roof basic protection layer.
Green roofs can range from roof gardens with raised beds and pots to rolled out green carpets to shed roofs containing planting cells that are filled with soil or compost and planted up with low growing perennials and grasses.
Green roof systems prices.