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.
How to install a green roof on a shed.
The steps to building a green roof are the same.
I liked the idea of having a bit more greenery in the property we live.
With a sturdy roof deck to support the roof the first step is to keep out the water.
Using rot proof timber build a frame around the roof to contain the garden.
The first layer should make your roof waterproof as well as root resistant.
While redeveloping our house we decided to install a living roof on our kitchen roof why you ask.
The membrane i used to protect the roof deck was a 2000 gauge polythene damp proof membrane.
Waterproof membrane or pond liner.
The frame can be made by simply nailing the corners together or by using l brackets to form the corners.
Flat roofs are an easier option from a green roof construction point of view but living roofs are able to grow on pitched roofs too.
You will need the following tools to fit your own green roof.
When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot.
Build a living roof green roof.
Make a normal flat or sloped roof into a beautiful living garden.
Creating the green shed roof growing medium.
Even a flat roof should have some pitch so that it sheds water toward gutters.
Green roof installation guide.
This means that shed green roofs are a very popular choice along with log cabin and garage green roofs.
Tanalised timber to build a 3cm high lip around the existing shed roof.
How to build a green roof step 1.
Substrate for the sedum to root to.
You will need two pieces of 2x4 timber the same length as the width of the roof and two pieces the same length as the depth of the roof minus 4 inches.
The membrane comes in a roll that was xm long and ym wide.
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.
For a green roof installation that pitch should be at least inch per foot of run.