Home Green Roof Basics and LEED LiveRoof System System Specifications Common Questions Contact Us Aesthetic & Environmental Benefits Financial Benefits LiveRoof and LEED Certification Financial Benefits Political Correctness With an emphasis on recycled components, energy conservation, sustainability and minimal environmental impact (via development), green roofs score points with city planners, the community and tenants.  This is oftentimes rewarded with zoning that allows for more intensive development. Building with green roofs may also receive tax credits or municipal grants and typically will command higher selling and rental prices. Conservation of Municipal Septic Systems Sponging up excess rainwater means municipal septic systems do not have to be expanded as much.  It also means reduced overflows as well as reduced pollution and associated costs (social and economic.) Extension of Roof Life Plants and soil act as a protective shield from the elements. This means:  No U.V. radiation/photo degradation of roofing components. Minimal thermal contraction and expansion (green roofs can reduce temperature fluctuations by as much as 90%).  Studies show that on a sunny 95°F day, conventional rooftop surfaces can reach 175°F. Green roofs bring these temperatures in line with the ambient air temperature. Protection from drying winds. Protection from mechanical damage. Reduction or elimination of cracks and leaks. Energy Conservation The evapotranspirative effect of the plants and four inches of growing medium typically reduces indoor temperatures 6 to 8 degrees during warm/hot weather and can reduce air-conditioning costs 25 to 50 percent in single story buildings.  This not only allows for ongoing cost savings but an initial reduction in the size of the required air conditioning equipment. Minimal insulation (R-Value) exists during cool or winter weather.  The pore space of the growing medium tends to be more water saturated at this time, and the plants won’t be as large and therefore will not trap as much air (essential to insulation value).  But, in snowy winter locations, the vegetation helps to trap blowing snow which adds insulation value. LiveRoof, LLC Subsidiary of Hortech, Inc. P.O. Box 533 Spring Lake, MI 49456 (800) 875-1392 fax (616) 842-3273