Toronto Green Standard (TGSv4) - Next Level Stormwater Management - Canada's Green Roof Supplier

Toronto Green Standard
TGS v4 1.3

Onsite Green Infrastructure

There are many green roof possibilities for tight urban sites. From Extensive to Biodiverse and Intensive, Next Level Stormwater Management has several systems to help meet the Toronto Green Standard (TGS). Review the TGS v4 Compliance Summary Chart below to select the best system for your project. Want to discuss further, our local experts are ready to help. Contact us.

Meet TGS v4 via two performance categories

Water Quality & Efficiency (WQ)
Ecology & Biodiversity (EC)

We’ll Help you Navigate These Requirements

Green Roof covering at least 80% of Available Roof Space
Intensive Green Roof for 80% of the Green Roof Area provided

High Performance. Low Emissions. Future-Proofed.

Vegetated system reduces convective heat loss through the roofing system
Vegetation traps snow, which adds natural insulation to the roofing system
Unlike reflective roofs, green roofs do not incur heating penalty in Canadian winter

Select the Best Green Roof System for Your Project

TGS v4 Compliance Summary

Categories^*	NLSM Systems	WQ 1.3 Compliance Options	WQ 1.1 Initial Abstraction^**
Extensive	LiteN’Less^TM II	80% of available roof space	5 mm
	LiteN’Less^TM III	80% of available roof space	5 mm
	StormCap^TM	80% of available roof space	5 mm
	StormCap^TM+Detention	80% of available roof space	5 mm
	TerraExt Sedum Standard	80% of available roof space	5 mm
	TerraExt with BioBerm	80% of available roof space	5 mm
Intensive	Flora Garden	80% of green roof area provided	7 mm
Biodiverse	Alpine Meadow	50% of green roof area provided	7 mm
	Alpine Meadow+	50% of green roof area provided	7 mm

* As defined by Toronto Green Standard version 4 (TGS v4)
** Based on Toronto Water’s Wet Weather Flow Management Guidelines (WWFMG)

Products

LiteN’Less™ III CRA

Thickness: 62 mm (2.4”)

Weight: 58 kg/m2 (12 lbs/sf)

Water Retention: 37 L/m2 (1.45 in)

The Form Condo 50 McCaul green roof. Lightweight and soilless system LiteN'Less Classic in foreground on high rise rooftop with skyscrapers in the background. Lightweight. Soilless. Economical.

TerraExt

Thickness: Starting at 118 mm (4.7”)

Weight: Starting at 143 kg/m2 (29 lbs/sf)

Water Retention: Starting at 60 L/m2 (2.4 in)

BioBerm™

Thickness: Starting at 150 mm (6”)

Weight: Starting at 210 kg/m2 (43 lbs/sf)

Water Retention: Starting at 88 L/m2 (3.5 in)

Alpine Meadow (Ontario Only)

Thickness: Starting at 188 mm (7.4”)

Weight: Starting at 242 kg/m2 (50 lbs/sf)

Water Retention: Starting at 117 L/m2 (4.6 in)

Flora Garden

Thickness: Starting at 168 mm (6.6”)

Weight: Starting at 215 kg/m2 (44 lbs/sf)

Water Retention: Starting at 99 L/m2 (3.9 in)

StormCap™

Thickness: Starting at 114 mm (4.5”)

Weight: Starting at 130 kg/m2 (27 lbs/sf)

Water Retention: Starting at 67 L/m2 (2.7 in)

Alpine Meadow+ (Ontario Only)

Thickness: Starting at 214 mm (8.4”)

Weight: Starting at 271 kg/m2 (56 lbs/sf)

Water Retention: Starting at 142 L/m2 (5.6 in)

StormCap™ Detain 3°

Thickness: Starting at 114 mm (4.5”)

Weight: Starting at 131 kg/m2 (27 lbs/sf)

Water Retention: Starting at 67 L/m2 (2.7 in)

Explore other Design Objectives

Wind testing image

Wind Tested

Proper Wind Design

Vegetated Roofs that Resist Violent Storms & Near Hurricane Winds

Extensive

Lightweight & Low Maintenance

Perfect for various buildings & budgets

Intensive

Sky’s the Limit

Stormwater management to urban agriculture

Bergeron Engineering Building

Biodiverse Roof

Bees & Butterflies

Friendly habitat for birds & pollinators

PV Integration

Green & Solar

Synergy for Zero Emission Buildings

Sherway Gardens 2

Stormwater Management

Retention & Detention Solutions

Putting storms in their place

Light & Economical

Ultralight & Soilless

Solution to weight and cost concerns

Two Old Mill condo path

Amenity Space

Rooftop Oasis

Visual amenity for user enjoyment

The Form Condo 50 McCaul green roof. Lightweight and soilless system LiteN'Less Classic in foreground on high rise rooftop with skyscrapers in the background. Lightweight. Soilless. Economical.

Energy Saving

Thermal Buffer

Greening for climate resiliency

Resources

Technical Documents Systems Directory

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Services

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