Urban Forester
ArboristSite Guru
Today I performed surgical root removal on a 22" honeylocust. The root was about 20 ft. from the trunk and had pushed up a section of sidewalk that was being replaced. After I made the cut a condo board member mentioned that a previous arborist had recommended that plastic be laid down over the root prior to the new concrete being poured. I had never heard of that and was concerned that plastic would greatly reduce 02 levels in the soil and inhibit microbial activity thereby reducing the "healing" of the root. I know that concrete is not exactly great for 02 levels but I saw no real benefit to plastic (to me plastic and roots don't play well together). Anyway on the way back I started thinking abgout possible reasons for plastic over the root. The only thing I could think of is the effect of new, wet concrete (the elements it contains) could have on the fresh cut. Has anyone ever heard of using plastic after root surgery in this situation?