Materials:CGT Extensive Layered Vegetated Roof System - Revision history

James Klassen at 16:08, 19 June 2026

2026-06-19T16:08:25Z

James Klassen at 17:18, 17 June 2026

2026-06-17T17:18:30Z

James Klassen at 17:16, 17 June 2026

2026-06-17T17:16:59Z

James Klassen at 15:06, 17 June 2026

2026-06-17T15:06:11Z

James Klassen: Created page with "NOTOC NONUMBEREDHEADINGS {{DISPLAYTITLE:{{FULLPAGENAME}}}} ..."

2026-06-17T15:04:13Z

Created page with "__NOTOC__ __NONUMBEREDHEADINGS__ {{DISPLAYTITLE:<span style="position: absolute; clip: rect(1px 1px 1px 1px); clip: rect(1px, 1px, 1px, 1px);">{{FULLPAGENAME}}</span>}} <big>..."

New page

__NOTOC__
__NONUMBEREDHEADINGS__
{{DISPLAYTITLE:<span style="position: absolute; clip: rect(1px 1px 1px 1px); clip: rect(1px, 1px, 1px, 1px);">{{FULLPAGENAME}}</span>}}

<big><big>Division C - Accepted Materials</big></big>
<br>
<big>Group - Vegetated Roof Systems</big>
<hr>
<big><big><big><big><big>CGT Extensive Layered Vegetated Roof System</big></big></big></big></big><br>
<big><big><big>by Columbia Green Technologies LLC</big></big></big><br>
{| class="wikitable"
|-
| style="background-color:#FFFACD" | '''<big>System/Material Acceptance and Product Details</big>'''
<br>
The information published in the RCABC '''''Roofing Practices Manual''''' and offered below does NOT represent a complete set of the manufacturer’s data or specifications, nor is this system and its various materials recommended or endorsed by the '''''Guarantor'''''. The preparation of a detailed specification is the responsibility of the ''Design Authority''.
|-
|
<div class="col-md-12">
<div class="col-md-6">
;:
;'''Vegetated Roof System Manufacturer''': [https://columbia-green.com/ ''' https://columbia-green.com/''']
;Accepted for the ''RoofStar Guarantee Program'': Date here
;Accepted for application in: Vegetated Roof Systems
;Acceptance Criteria: Refer to the [[VRA Standard | RGC Standard for Vegetated Roofs]]
;System Summary: description here, using <br>breaks
<br>
<div style="text-align: left;">
[[File:Extensive VR System (banner).JPG| left | class=img-responsive | link=]]
</div>
</div>
<div class="col-md-6">
;:
;Manufacturer online resources: [link page name]
;System Type: Extensive
;System Depth: give range
;Growing Media Depth: give range
;Vegetation Profile: give manufacturer's profile name or description
;Suitable climate zones: give range or list zone numbers
;System Components<sup>*</sup>: In the usual order, from top to bottom; click on link for Technical Data Sheet (TDS)
:{| class="wikitable"
|-
|
*[link '''Component name''']
*[link '''Component name''']
*[link '''Component name''']
*[link '''Component name''']
*[link '''Component name''']
*[link '''Component name''']
*[link '''Component name''']
*[link '''Component name''']
|}
</div>
<div class="col-md-12">
<hr>
<div class="col-md-6">

;<sup>†</sup>Guarantor's Notes: Systems labeled "Inverted" are designed for a ''protected membrane roof assembly'', also known as an inverted ''roof assembly''.

:While ''Semi-intensive'' and ''Intensive vegetated roof systems'' are limited to only ''protected membrane roofs'' (See the [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.2._Permitted_Vegetated_Roof_Systems Sentence 1.1.3.2.(5)] in the "RGC Standard for Vegetated Roofs"), some vegetated roof system manufacturers offer their systems for ''conventionally insulated roofs''. To request a written Variance to the published limitation, follow the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.6._Variances Article 1.1.3.6.].

</div>
<div class="col-md-6">

;<sup>*</sup>Conditions and Limitations: Note that system thickness is dependent upon the selection of components, which is determined (in part) by design parameters, including hydrological requirements. Consult with the ''vegetated roof system manufacturer'' for options and saturated system weight.

:Also note that vegetation coverage under the '''''RoofStar Vegetated Roof Guarantee''''' applies only to ''extensive systems'' planted with mats or trays - see [https://rpm.rcabc.org/index.php?title=Guarantee Part 3] of Division A for more about coverage.

</div>
</div>
<div class="col-md-12">
<br>
|}

<hr>

[[Division C: Accepted Materials|<i class="fa fa-chevron-circle-left fa" ></i> Back to ''Accepted Materials'']]

[[Main Page|Home]]

@@ Line 28: / Line 28: @@
 :Due to the limited depth of the growing media, '''Extensive Layered Systems''' are typically planted with low-growing sedum varieties well-suited for rooftop environments. Growing media depths are determined by structural considerations, plant selection, and stormwater retention objectives.
-<br>
 <div style="text-align: left;">
 [[File:Extensive VR System (banner).JPG| left | class=img-responsive |  link=]]

@@ Line 35: / Line 35: @@
 <div class="col-md-6">
 ;:
-;Manufacturer online resources: [link page name]
+;Manufacturer online resources: [https://columbia-green.com/wp-content/uploads/2020/09/CGT_LAYERED_EXTENSIVE_SYSTEM_TIS.pdf CGT Layered Extensive System]
 ;System Type: Extensive
 ;System Depth: 110 mm (4.38") to 240 mm (9.38")

@@ Line 23: / Line 23: @@
 ;Accepted for application in: Vegetated Roof Systems
 ;Acceptance Criteria: Refer to the [[VRA Standard | RGC Standard for Vegetated Roofs]]
-;System Summary: description here, using <br>breaks
+;System Summary: The Columbia Green Technologies (CGT) '''Extensive Layered System''' is a lightweight built-up vegetated roof system that accommodates a variety of layouts.  The system’s layers can be easily shaped to fit curves and angles.
 <br>
 <div style="text-align: left;">
@@ Line 33: / Line 37: @@
 ;Manufacturer online resources: [link page name]
 ;System Type: Extensive
-;System Depth: give range
+;System Depth: 110 mm (4.38") to 240 mm (9.38")
-;Growing Media Depth: give range
+;Growing Media Depth: 80 mm (3") to 200 mm (8")
-;Vegetation Profile: give manufacturer's profile name or description
+;Vegetation Profile: Sedum-Herbaceus-Grasses
-;Suitable climate zones: give range or list zone numbers
+;Suitable climate zones: All BC zones, subject to manufacturer's approval
 ;System Components<sup>*</sup>: In the usual order, from top to bottom; click on link for Technical Data Sheet (TDS)
 :{| class="wikitable"
 |-
+|
-*[link '''Component name''']
+*[https://rpm.rcabc.org/images/5/5f/CGT_Pregrown_Sedum_Mat_TDS.pdf '''CGT Sedum Mat'''] or [https://rpm.rcabc.org/images/c/c4/CGT_Pre-Grown_Sedum_Tile_TDS.pdf '''CGT Sedum Tile''']
-*[link '''Component name''']
+*[https://rpm.rcabc.org/images/8/88/CGT_Extensive_Growing_Media_TDS.pdf '''CGT Extensive Growing Media''']
-*[link '''Component name''']
+*[https://rpm.rcabc.org/images/5/55/CGT_Mineral_Wool_Retention_Layer_TDS.pdf '''CGT 1" Water Retention Layer''']
-*[link '''Component name''']
+*[https://rpm.rcabc.org/images/c/ce/CGT_.375%E2%80%9D_Drainage_Filter_Layer_TDS.pdf '''CGT 0.375" Drainage Filter Layer''']
-*[link '''Component name''']
+*[https://rpm.rcabc.org/images/a/a4/CGT_Root_Barrier_ML2109_TDS.pdf '''CGT Root Barrier''']
-*[link '''Component name''']
+:'''Roof Assembly''' by roofing ''Contractor''
-*[link '''Component name''']
-*[link '''Component name''']
+*[https://rpm.rcabc.org/images/4/4c/CGT_Metal_Edger_for_Layered_System_TDS.pdf '''CGT Metal Edger''']
 |}
 </div>