The global effort toward going green has gained momentum in nearly all components of everyday life. From recycling and purchasing organic produce to composting and energy conservation techniques, more and more, the world shifts focus toward a greener, more environmentally friendly way of life. Enter, the living roof system. 
A living roof is a green roof system that is either partly or entirely blanketed in soil and vegetation. The living roof usually includes a waterproofing casing atop a waterproofed foundation. It may include additional layers such as a root barrier and drainage and irrigation systems. Other names for a living roof system are vegetated roofs, green roofs and eco-roofs.
As a Portland homeowner, you may have already heard about living roofs. Portland is a city known for interest in environmental issues and green technology.
If you’re looking for a way to do your part the environment, add some aesthetic quality to the appearance of your Portland home and save on roof repair, heating and air conditioning bills, a living roof system may be the right choice for you. Read on to learn more about living roofs, including their history and function, the different types of green roofs and the numerous benefits of green roof systems.
Green Roofing Portland OR — An Overview of Living Roof Systems
Contrary to what some might think, a living roof structure is not merely some wacky new wave venture pioneered by environmental extremists. In fact, the living roof can be traced back to the Hanging Gardens of Babylon.

Hanging Gardens of Babylon
Scandinavian countries have been insulating their homes with sod for centuries. Additionally, many early North American settlements used green roofs as part of their housing structures.

Homes with green roof structures in Norway

Sod roof home in Virginia city from the late 1800s
In the 1960s, Germany initiated the resurgence of living roofs, which has since propelled a global interest in the modern green roof technology systems of today.

ACROS Fukuoka in Japan
Several Asian and European countries have followed suit, including Japan, Italy, Hungary, Sweden, the UK, Austria and the Netherlands. Over the years, many homes and commercial businesses in the United States have adopted living roof technology, with cities including Atlanta, Chicago, New York and Portland leading the charge.
Living Roofs for Portland Homeowners — The Modular Green Roof
A qualified green roofing contractor in Portland will install a modular green roof system, which represents modern roofing technology and has made the living roof more accessible to businesses and homeowners. 
A modular green roof is a layered structure that sits atop the roof deck. It includes vegetation panels, a drainage layer, a root barrier and a waterproofing membrane. Modular green roof systems can be built on a flat or sloped surface.
A green roofing contractor in Portland can customize and install different types of eco-roofs that range from extensive and intensive.
Extensive living roofs are the most basic modular green roof system. Green roofing consultants in Oregon will likely install a layer of sedums that have shallow roots and are able to withstand draught. In this case, green roofs are only a few inches deep and the vegetation is low maintenance.

Extensive living roof
Intensive roofs are deeper, more intricate structures that homeowners can literally turn into a garden. If your roofing contractor in Portland installs an intensive roof, you will need to commit to regular maintenance including watering, gardening and even mowing.

Intensive green roof system at Chicago City Hall
Green Roofing for Your Portland OR Home — Environmental Benefits
The environmental advantages of a living roof installation for your Portland OR home are seemingly endless. Qualified green roofing consultants in Oregon can provide detailed information about the eco-friendly gains to installing living roof systems in the Portland area.
In general, green roofs help reduce pollution due to the levels of oxygen emitted by plants. Living roofs also help manage storm water runoff. A substantial portion of Portland rainwater, approximately 27 percent, can be absorbed by the vegetation of a green roof. Pollutants stay in the soil while the rainwater eventually returns to the atmosphere through condensation.
Eco roofing in Portland OR can also help dispel what is known as the Urban Heat Island Effect. The Urban Heat Effect is a phenomenon that points to rising temperatures the city and climate change. Concrete, metal, asphalt and other conventional roofing materials conduct heat. The overwhelming presence of conventional roofing in Portland OR disrupts the energy balance in the metropolitan area. As a result, urban temperatures can rise to as much as 10 degrees warmer than surrounding rural areas. Through a green roofing installation for your Portland OR home, you can do your part for the global environment and the city at large.
Green roof systems help reduce the Urban Heat Island effect, which in turn reduces the cost of lowering greenhouse gas emissions and ground level ozone. Unlike conventional roofing materials, green roof systems absorb and decrease thermal air movement. Vegetation has a natural cooling effect. The plants absorb and temporarily retain roof heat, releasing it into the atmosphere as temperatures cool.
Another benefit to eco roofing in Portland OR is the natural environment created for insects, plants and animals. This goes a long way to help share the planet, especially in urban settings where natural habitats are limited. Green roofs can be of particular support to bee populations, which are currently facing threat in the U.S.
Living Roof Systems for Your Portland OR Home — Homeowner Advantages
Beyond the long list of environmental benefits through green roof systems are the many advantages for homeowners. A living roof can be a cost effective alternative to conventional roof structures.
Roofing consultants in Oregon can attest to the fact that vegetated roofs offer much better insulation. Better insulation reduces spending on heating and cooling the home. During warmer months, a green roof is anywhere from 10 to 20 degrees cooler than conventional roofs. In the winter, the roof helps trap heat so it stays warmer indoors.
Living roofs are more durable because they protect the roof membrane. In fact, a green roofing system for your Portland OR home can last up to twice as long as a traditional roof. The green roof provides a barrier, which reduces expansion and contraction associated with changing weather patterns.
Green roofs can also provide a solid sound barrier. Portland homeowners will appreciate the dissipation of city noises through the insulation provided by a living roof.
Look for Qualified Green Roofing Consultants in Oregon
Your roofing contractor in Portland should have expert knowledge and extensive experience in living roof installations. Professional green roofing consultants in Oregon can help you investigate your options and install a modular green roof system that works best for your home.