[CANUFNET] Root systems & private property

[Naomi Zurcher]

You might also considering using a structural soil for the substrate as it looks as if there’s open landscape to the right of the broken sidewalk and that would help convey roots to the additional open landscape without continuing to heave pavement.

Also, you might consider using a pervious treatment rather than during concrete. This would further assist supporting a healthy soil as well as a viable root system by increasing the bootable soil volume which requires air and moisture, facilitated by pervious, permeable or porous paving. I am attaching an excellent resource which explains the differences, etc.

Hope this helps.

Naomi



> On Nov 1, 2019, at 10:51 AM, Trevor Thistle via CANUFNET <canufnet at list.web.net> wrote:
> 
> Is that broken sidewalk also on the Municipalities side of the property line? In edmonton, that may determine who pays for sidewalk repair. 
> 
> In this situation I would remove the broken sidewalk, air excavate out the soil in the area of the sidewalk, place the gravel base for the sidewalk around and over the roots and repour the sidewalk to match the height of the first step. Air excavation will also give you a good idea of what the tree has for structural roots. for example, it the tree has 6 roots under the walk but only one needs to be removed to replace the concrete, you would feel more confident that a selective root prune won't render the tree hazardous. however, if the root you need to cut is 1 of only 2 roots on that side of the tree, thats something to be concerned about. 
> 
> In Edmonton we do something we call a tree treatment when replacing sidewalks that have failed due to root conflicts. this sometimes involves decreasing the thickness of the base under the concrete and / or reducing the thickness of the concrete, but reinforcing it with additional rebar. In addition, the cement is scored every 12-16 inches before it cures (just as you would with sidewalk panels). the rebar will prevent the concrete from disjointing, and the scores in the concrete will control and perhaps hide the cracking
> 
> You will likely have to curve the walk around the tree. 
> 
> raising the walk may allow you to avoid root pruning but you will have to do some minor filling and sod replacement to get everything to blend together.
> 
> I hope this helps. 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Trevor Thistle Bsc. Forestry
> Urban Forester | PR-4760AM | Tree Risk Assessment Qualified
> OPEN SPACE OPERATIONS
> CITY OPERATIONS |  PARKS AND ROADS SERVICES
> 
> 780-944-5577  OFFICE
> 780-913-5893  MOBILE
> 
> City of Edmonton 
> 12830 58 Street NW
> 
> 
> 
> 
> On Thu, Oct 31, 2019 at 5:49 PM Andrew STEIN via CANUFNET <canufnet at list.web.net <mailto:canufnet at list.web.net>> wrote:
> Hello all,
> 
> Looking to improve practices and policies as a municipal urban forester and wondering how other authorities manage public tree root systems venturing onto private property. Public trees butting up against fences, sidewalks, surface roots, etc. 
> 
> Managing expectations is a big part, but what about situations where an intervention is required, such as the photo included below, where a public tree is immediately adjacent to a private sidewalk that needs repair? 
> Are critical rooting distances ALWAYS respected? 
> Do other municipalities offer support to homeowners? If so, in what capacity?
> 
> Many thanks,
> 
> Andrew
> 
> -- 
> Andrew Stein, M.Sc.
> Agent de recherche
> Direction des travaux publics
> Division voirie et parcs
> Ville de Montréal - Arrondissement LaSalle
> 
> 7277 Cordner
> LaSalle (Québec), H8N 2J7
> 
> Cellulaire: 514-241-0567
> Courriel: andrew.stein at montreal.ca <mailto:andrew.stein at ville.montreal.qc.ca>
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