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<DIV><FONT size=2 face=Arial>We never use a woven landscape fabric/geotextile as
a weed barrier.- it will not suppress weeds well as they just grow into the
voids of the woven fabric. Non-woven fabric has no or less voids to allow weed
growth, as it is spun into a mass. </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV>Mark Peterson, BES, MLArch, OALA <BR>Mark Peterson & Associates,
Landscape Architect<BR>(519)743-2990
<A href="http://www.openspacesolutions.com">www.openspacesolutions.com</A></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=IWilson@kelowna.ca href="mailto:IWilson@kelowna.ca">Ian Wilson</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=canufnet@list.web.net
href="mailto:canufnet@list.web.net">canufnet@list.web.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, October 29, 2009 9:09
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [CANUFNET] Anyone have
experience with various weed barrierfabrics?</DIV>
<DIV><BR></DIV><!-- Converted from text/plain format -->
<P><FONT size=2>I think you have a good case to get them to replace at their
expense. However we have stopped using weed barrier entirely. We
found that it keeps the weeds down for a few years but eventually the weeds
invade the mulch and when you try to pull them it pulls up the cloth and
becomes a big headache. We just control weeds the old fashioned
way, pull by hand or till with hand tools<BR><BR>Ian Wilson<BR>City of
Kelowna<BR>--------------------------<BR>Sent from my BlackBerry Wireless
Handheld<BR><BR><BR>-----Original Message-----<BR>From:
canufnet-bounces@list.web.net <canufnet-bounces@list.web.net><BR>To:
canufnet@list.web.net <canufnet@list.web.net><BR>Sent: Thu Oct 29
13:12:12 2009<BR>Subject: [CANUFNET] Anyone have experience with various weed
barrier fabrics?<BR><BR>Some Background:<BR>A contractor installed 3 oz woven
polypropylene landscape fabric in a large, irrigated, raised median, whereas
the contract specs called for 3 oz spunbonded polypropylene. Spunbonded was
specified due to its better air and water permeability (min. 100 gal/min/sf)
whereas the woven material has less than 15 gal/min/sf. The planter has a drip
irrigation system, and to aggravate the matter, the irrigation lines were laid
on top of the woven material. Water is pooling on the tarp-like woven
material.<BR><BR>The contractor refuses to replace the non-approved material
with the spec'd material, claiming it "exceeds" the specifications. It may
exceed the spec in terms of strength, but the critical characteristic of
permeability has been compromised.<BR><BR>The questions are:<BR>1) Will the
woven, less permeable material cause problems with plant growth and survival
(trees and perennials), or can we live with it - with the drip lines on top if
it?<BR><BR>2) What are your experiences with spunbonded (or non-woven) weed
barriers vs woven?<BR>Thanks<BR><BR>C. Cat Cybulski, R.P.F.<BR>Area
Forester<BR>Natural Heritage and Forestry Services Section<BR>Transportation
and Works<BR>Regional Municipality of York<BR>(905) 895-1200 ext. 5275<BR>Toll
Free: 1-877-464-9675 ext. 5275<BR>www.york.ca <<A
href="file://www.york.ca">file://www.york.ca</A>> <BR><BR></FONT></P>
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