[CANUFNET] Constructing Driveways within Critical Root Zones

[Mark Carroll]

I don't have an example of a driveway being elevated, but there are examples in the City of Toronto where the house was built this way. The addition was built on stilts to preserve the roots. A full concrete pad was elevated and the addition was built on top. It is not uncommon for this to be done. England has made some good practices for preserving their trees. They have actually built basements under the roots of trees. There are engineered peers that can be drilled down to the 2.5 to 3 meter depth that will support the needs of a carrying load to build a driveway and keep the root zones intact.

Mark Carroll
ISA Certified Arborist, Qualified Arborist Tech
All around nice guy
Taking our environment first
Thanks for connecting...

 
 
  On Fri., 10 Jul. 2020 at 11:26 a.m., Astrid Nielsen via CANUFNET<canufnet at list.web.net> wrote:   Hello Canufnet members,
I have a client that is building two homes on an infill lot where there is a very large (106 cm), healthy silver maple. He is very willing to explore different options for working around the tree that would cause minimum disruption to the roots. 
Does anyone have examples of building driveways within the critical root zones of large trees that have managed to prevent significant root damage and tree decline? Specifically, he is considering a type of elevated driveway that would not require the severing of roots or significant soil compaction, and dissipate the pressure through posts. Although the posts would cause some root damage, it would be significantly less than excavation for a standard driveway. If anyone has examples of this type of engineering, I would be grateful if you could share it with me.
Thank you,
Astrid
______________________________________Astrid Nielsen, MFCOntario Registered Professional ForesterISA Certified Arborist®ISA Tree Risk Assessment Qualified
astrid.nielsen at dendronforestry.ca
+1.613.805.WOOD (9663)
www.dendronforestry   
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