tag:blogger.com,1999:blog-6569118138162974656.post3121463504410517213..comments2019-12-17T11:06:57.432-05:00Comments on City of Richmond Department of Public Utilities: Up on the Roof -- The Green RoofRichmond VA Department of Public Utilitieshttp://www.blogger.com/profile/01137444627760138334noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-6569118138162974656.post-70915176437007713502012-07-26T10:55:17.567-04:002012-07-26T10:55:17.567-04:00The main disadvantage of green roofs is the higher...The main disadvantage of green roofs is the higher initial cost. Some types of green roofs do have more demanding structural standards especially in seismic regions of the world.Building and Roofinghttp://www.building-and-roofing.co.uknoreply@blogger.com