Keep in mind that an intensive green roof uses more soil so it won t need the same insulation as other types of green roofs.
Soil on roof for insulation.
It will however need waterproofing.
Roll over the root membrane.
Brush into place 3.
A sedum green roof is not quite as good an insulator as a wildflower green roof.
Draining and root stopping 1.
Pour on the bags of gravel your looking to get just a single layer cover over the entire roof 2.
To hold them up you need a really beefy building with a well supported roof.
It is most commonly used as roof insulation because of it s compatibility with hot bitumens but is also used as wall insulation.
Some sources we researched assert that one inch of insulation is equal to about two feet or more of soil.
Deep layers of substrate growing medium are extremely heavy.
In a cold climate using rigid foam insulation has the additional benefit of warming the soil even if just a bit beneath the insulation and next to the foundation well draining soil is placed over the sheet material up to grade where a large diameter topping material such as pea stone or wood mulch helps to break up the falling water and reduce splashback to the building.
After ensuring you have proper water management in place up to 20 inches of soil or growing medium is added to the roof followed by the plants and trays.
However there s a compromise here.