Soil On Roof For Insulation

The deeper the growing medium on your green roof the better it will insulate.

Soil on roof for insulation.

Deep layers of substrate growing medium are extremely heavy. It s r value range of 5 6 6 5 for 1 of material is the highest of the primary rigid insulation types hence it s highest cost. It will however need waterproofing. Some sources we researched assert that one inch of insulation is equal to about two feet or more of soil.

It is most commonly used as roof insulation because of it s compatibility with hot bitumens but is also used as wall insulation. If we take insulation to be a bit more specific say the most commonly used material fiberglass that s about r3 inch for fiberglass or if we believed the soil r value rule of thumb about dirt that s about 24 3 about r 0 8 for arbitrary dirt insulation value. 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. 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. A sedum green roof is not quite as good an insulator as a wildflower green roof. To hold them up you need a really beefy building with a well supported roof. 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.

However there s a compromise here.