Roseville Roofing: Article About Introduction To Green Roofs
When choosing a roof, one option that many homeowners don't consider is a green roof. This style of roof, which is characterized by green vegetation planted on top of the home, shouldn't be confused with eco friendly materials such as metal. Installing a green roof can be challenging, but it's nothing that Roseville roofing experts can't take on.
Green roofs, sometimes referred to as live roofs, offer a wide range of benefits for homeowners as well as environmental benefits. Instead of using materials such as asphalt to cover the roof of a house, using live plants improves air quality. When choosing green roofs, homeowners have two varieties to choose from: extensive and intensive.
Extensive green roofs typically have around a 4 to 6 inch layer of media under the plants. This type of system is usually more fragile than the other, but professional roofers can create a pathway so that the roof is still accessible. An intensive green roof uses a thicker layer of media, which allows it to support large plants such as bushes and small trees. At minimum, this style of roof requires a media of 6 inches, but a thicker media is usually needed. Most homeowners choose intensive roofs because they are more functional.
The expert roofers at Allstate Roofing of Roseville can assist you with any questions regarding commercial roofing or gutters.
When professional roofers are building a green roof, there are a number of layers they have to lay before the roof can be completed. The bottom layer that sits on the roofing membrane protecting the roofing deck is called the root barrier. The goal of this layer is to keep the roots of the roofing system from growing into the home via the roofing deck. Above the root barrier is the protection layer. This is a membrane that is puncture resistant and protects the root barrier from being damaged during installation. However, some protection layers can absorb nutrients and water.
Above the protection layer is the drainage layer, which is made of very lightweight material. No roof can have water that just sits on top of it, so the drainage layer allows all the water that the plants don't soak up to run off the house. The filter layer comes next, and it's job is to simply segregate the media from the drainage layer. The filter layer has small holes that allow water to drain but not dirt, keeping the drainage layer from becoming clogged.
The last two levels are the most important. Above the filter layer is the growth media, which consists of the dirt or soil for the plants. This media has to provide air, water and nutrients to the vegetation. On top of that is the plant level, which protects the home from sun, rain and other outdoor elements.