[CANUFNET] Constructing Driveways within Critical Root Zones

Mon Jul 13 10:07:02 EDT 2020

Silva cells would be hard to use for this purpose. They are better suited to creating soil volumes where there are none. In this case Astrid needs some form of no-dig or minimal excavation solution to go over the existing soil volume….while trying to keep the negative consequences that Michael R. pointed out to a minimum.

Cheers,

Philip van Wassenaer, B.SC., MFC

Urban Forest Innovations Inc.

1331 Northaven Drive

Mississauga ON L5G 4E8

Tel:  (905) 274-1022

Cell: (647) 221-3046

Fax: (905) 274-2170

www.urbanforestinnovations.com <http://www.urbanforestinnovations.com/> 

From: CANUFNET <canufnet-bounces at list.web.net> On Behalf Of Sadia Butt via CANUFNET
Sent: July 11, 2020 1:01 PM
To: Canadian Urban Forest Network <canufnet at list.web.net>
Cc: Sadia Butt <sadiabutt.ca at gmail.com>
Subject: Re: [CANUFNET] Constructing Driveways within Critical Root Zones

Hi Astrid, I recall several years ago that 'silva cells'  was something I thought was a great idea for both new construction and for retrofitting areas near trees worth preserving/conserving. There are some new designs these days. But for an additional idea and if the client is willing to send here are some links. The company who  brokers the cells is Deeproots. In my mind it is one of the most amazing inventions. 

Best regards,

Sadia

http://www.deeproot.com/products/silva-cell/silva-cell-overview.html

http://www.deeproot.com/silvapdfs/resources/articles/Comparing_Silva_Cells_and_Structural_Soil.pdf

http://lg.baumpub.com/news/54/roots-running-deep

On Fri, Jul 10, 2020 at 3:21 PM Astrid Nielsen via CANUFNET <canufnet at list.web.net <mailto:canufnet at list.web.net> > wrote:

Thank you everyone for your good suggestions...this has been very helpful and I'm grateful that we have a mechanism through which we can share this valuable info.

Have a great weekend!

Astrid

__________________________________________
Astrid Nielsen, MFC

Ontario Registered Professional Forester

ISA Certified Arborist®

ISA Tree Risk Assessment Qualified

 <mailto:astrid.nielsen at dendronforestry.ca> astrid.nielsen at dendronforestry.ca

+1.613.805.WOOD (9663)

www.dendronforestry <http://www.dendronforestry.ca>  

On Fri, Jul 10, 2020 at 1:33 PM Philip van Wassenaer via CANUFNET <canufnet at list.web.net <mailto:canufnet at list.web.net> > wrote:

We have done a variety of these with various methods but our colleagues have provided you some really good guidance already. I think if you look at the pdf Geri just sent you, you have a gold star solution. You can source the materials for the layers from a whole variety of suppliers but the approach is cutting edge…IMHO 😊.

Cheers,

Philip

Philip van Wassenaer, B.SC <http://B.SC> ., MFC

Urban Forest Innovations Inc.

1331 Northaven Drive

Mississauga ON L5G 4E8

Tel:  (905) 274-1022

Cell: (647) 221-3046

Fax: (905) 274-2170

www.urbanforestinnovations.com <http://www.urbanforestinnovations.com/> 

From: CANUFNET <canufnet-bounces at list.web.net <mailto:canufnet-bounces at list.web.net> > On Behalf Of Geri Poisson via CANUFNET
Sent: July 10, 2020 12:01 PM
To: Canadian Urban Forest Network <canufnet at list.web.net <mailto:canufnet at list.web.net> >
Cc: Geri Poisson <gpoisson at beaconenviro.com <mailto:gpoisson at beaconenviro.com> >
Subject: Re: [CANUFNET] Constructing Driveways within Critical Root Zones

We had a project where the client wanted to raise the grade over the root zone of a 100+ cm DBH White Oak. The city accepted a plan to use a plastic grid filled with gravel (see attached) laid over the existing grade to avoid compaction and allow infiltrations.  I’m not sure that it has been constructed yet, so I can’t speak to how successful the method will be in protecting the tree’s health and survival, but the city accepted it.

Geri Poisson, B.A. (Hons.), Dipl. Eco. Restoration / Terrestrial Ecologist, ISA Certified Arborist

Beacon Environmental

6 Cumberland St., Barrie, ON L4N 2P4

T) 705.999.4935 x249  C) 705.828.1196

 <https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.beaconenviro.com&data=02%7C01%7Cgpoisson%40beaconenviro.com%7Cee60e28cb2064cd8224108d7798fcf4f%7C7ad3048f5c1d4bc1b2a671cdb2d9e8f1%7C0%7C0%7C637111530868126573&sdata=00ounYtxds2VsraFAcE6Q%2BdsQtjoXOcd0oTUS0ol1LI%3D&reserved=0> www.beaconenviro.com

To protect our staff, families, clients and the greater community all Beacon staff are working remotely. We will continue to provide timely communications via email and telephone and are committed to providing the highest level of service possible during this challenging time. 

From: CANUFNET <canufnet-bounces at list.web.net <mailto:canufnet-bounces at list.web.net> > On Behalf Of Astrid Nielsen via CANUFNET
Sent: July 10, 2020 11:15 AM
To: Canadian Urban Forest Network <canufnet at list.web.net <mailto:canufnet at list.web.net> >
Cc: Astrid Nielsen <astrid.nielsen at dendronforestry.ca <mailto:astrid.nielsen at dendronforestry.ca> >
Subject: [CANUFNET] Constructing Driveways within Critical Root Zones

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, MFC

Ontario Registered Professional Forester

ISA Certified Arborist®

ISA Tree Risk Assessment Qualified

 <mailto:astrid.nielsen at dendronforestry.ca> astrid.nielsen at dendronforestry.ca

+1.613.805.WOOD (9663)

www.dendronforestry <https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.dendronforestry.ca%2F&data=02%7C01%7Cgpoisson%40beaconenviro.com%7C16b372ce5e9f451f789308d824e59096%7C7ad3048f5c1d4bc1b2a671cdb2d9e8f1%7C0%7C0%7C637299915675762450&sdata=xsWmVHkOi7KAUCiZIMwKgEOZpqTRxKp7isUvikFRFYM%3D&reserved=0>  

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