Green Roof Conversions

If you're looking for an eco-friendly project--that benefits your wallet, too--consider green roofing. Green roofing provides energy savings and retains stormwater that would normally find its way into sewage systems. Many homeowners are going green to save money and help the environment, but the concept is still new. So, it's important to ask your contractor the right questions before taking the plunge.

Five Questions to ask your Contractor about Green Roofing

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1. Do you recommend an extensive or intensive green roof?
   Depending on your budget, your roof's load limits, and its slope, you may be limited to an ecological cover (extensive). Or, you may also be able to turn your green roof into a space for leisure, gardening, or other outside endeavors (intensive). Your roofing contractor should be able to give you a solid answer on what type of green roofing is appropriate for your home.
2. What kind of irrigation system, if any, is needed?
   Intensive green roofs often require irrigation. So, ask your contractor what kind of irrigation system your roof needs.
3. What is the cost for materials, maintenance, and the conversion?
   While it largely depends on the type of roof, industry website portal Greenroofs.com puts the price range of intensive roofs at upwards of $25/ft², while extensive green roofing generally ranges from $9-$25/ft². If the price isn't within this range, make sure you know why.
4. Do you work with any consultants in the design process?
   While roofing contractors may have expertise in roofing, you may want to make sure they've done specific research on green roofing. Specialized consultants may be more aware of cost-efficient methods. For example, Katrin Scholz-Barth, an internationally known expert in green roofing interviewed by NPR about the cost considerations of green roofs, works with clients to manage roofing conversion products within their budgets.
5. Do you have any existing green roof projects I can see?
   You should be able to see existing roofing projects. If you don't see one you like, don't worry! Research online green roofing project databases to find ideas to show to your roofing contractor.