Green Roof System For Shed

The slope of a green shed roof needs to be a balance between being too steep or too shallow.

Green roof system for shed.

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. Building a green roof on your shed is a way to add interest to the shed and produce a new area to cultivate. A shallow roof pitch wont allow water to drain away. There are some things you need to check before building but the job is not very difficult.

This was not flat at all but had a fall of 75mm 3 over its length of 2 4m 8. 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. For this shed i used nominally flat roof. It is always best when buying a shed for this purpose to go for a reinforced shed.

Waterproof first a layer of waterproofing needs to be added to your shed or garage. When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot. Alternatively you can reinforce and brace the internal shed structure and roofing joists before fitting. 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.

This gave a 1 40 slope which was enough to encourage water to drain. 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.