As we move further into the 21st century, the general populace is becoming increasingly concerned about the environment and new ways to apply green living to all aspects of our lives. Green living (many ideas available for interested homeowners here). The roofing industry is no exception. There are some products, such as metal roofs, that lower your heating costs. There are others that help by recycling post-consumer products such as tires, milk jugs, waste wood, and various other plastics, though at a slightly higher cost to the customer. There is one option, however, that is by far the greenest both literally and figuratively.
Called by many, “the living roof,” it’s by far the most environmentally friendly option for your next building project. Not only does it help lower your heating and cooling costs by adding additional insulating layers on to your existing roof, it helps reduce harmful storm water runoff as well. Storm water runoff has recently been discovered to be contaminating no less than 13 percent of rivers, 18 percent of lakes, and 32 percent of estuaries across the United States.
Here are several benefits to having a living roof:
Reduce Energy Usage
The green roof can reduce your heating and cooling costs by adding additional insulation and mass to your roof. The natural evaporation process of rainwater on your roof also contributes to lowering the cooling load on a building anywhere from 50 to 90 percent.
Reduce Storm Water Runoff
By capturing and absorbing rainwater before it has a chance to create runoff in the streets and in the storm drains, it reduces the overall amount of pollution that makes it into the water table. The water that does manage to runoff will have already been filtered by the plants and the soil foundation that they grow from. Streams, rivers, lakes, and ponds can more easily sustain their natural ecosystem without dangerous foreign pollutants.
Helps Absorb Pollutants
Living roofs can help to absorb pollutants such as carbon dioxide and carbon monoxide out of the air and replace them with pure oxygen. This can be especially helpful in the city and can even lead towards cooling the overall temperature of a city by reducing the heat island effect.
Increase the Life-span of Your Roof
Green roofs provide extra layers of protection on top of your water proofing membrane to reduce the environmental wear and UV damage that it would normally endure. Hail and other such dangerous weather would have little to no impact on the integrity of your roof due to the nature of the construction.
Tax Incentives
There are many tax incentives that are provided to both residential and commercial business owners who choose to install living roofs. New York City and Philadelphia are two such cities that provide tax credits for “greening” your roof.
Of course, nothing is ever perfect, so here are a few downsides to living roofs:
Higher Cost
If you’re constructing a new building, the cost of initially installing a green roof can be higher. Wait, aren’t you just planting a garden on your roof? Not exactly. It’s actually constructed in many layers which are as follows:
- Base (concrete slab, roof decking, etc.)
- Sub-Membrane
- Waterproofing Membrane
- Drain Mat
- Soil Filter Fabric
- Actual Soil Layer
- Plant Layer
Additional Structural Support
Since it’s carrying so much additional weight, you will have to add additional structural support to meet local building codes and safety standards.
The facts should speak for themselves, and the pros certainly outweigh the cons. A living, green roof is the way to go if you’re really wanting to go green!
Tags: eco-friendly, energy efficiency, green roofing, living roof, roof replacement, roofing, roofing materials, tax incentives
