MeristemLiving roof systemsTechnical portal
Formerly Verdura Roof Products

Roofs that
are measured,
not just planted.

Six vegetated assemblies, each specified against a number an engineer can hold us to: saturated load, retained rainfall, wind uplift, panel yield. Built in Ontario since 2006.

Meristem MEADOW · exploded assembly44 lb/ft² saturated
Native meadow plantingSeeded + plugged, ecoregion matched30 mmGrowing media, deep profileVaried depth 100–200 mm for niche diversity105 mmFilter fabricNon-woven PP, 4 oz4 mmDrainage + retention board0.44 gal/ft² held at the root zone25 mmRoot barrierFLL-tested, 0.5 mm HDPE, loose laid6 mmWaterproofing (by others)Assembly is membrane-agnostic10 mmSTRUCTURAL DECK (BY OTHERS)

2.4M

ft² installed since 2006

6

systems, one document set

92%

peak annual retention

20 YR

system warranty, registered

The rename, plainly

New names. Same assemblies.

Every product was renamed in 2026 when we split the range by what it is engineered to do rather than how thick it is. Nothing was discontinued and no build-up changed without a revision note.

Holding a drawing that calls out V-Lite 100 or ED-300? Type the old name and we will tell you what it is now and what changed with it.

Look up an old name

Six systems, one document set

Compare all specifications

Extensive

26 lb/ft² saturated

The thinnest full assembly we build, for decks with nothing left to give.

Depth
4"
Slope
2:12
Retention
55%
Explore the LITE

Extensive

32 lb/ft² saturated

Pre-grown modules that land planted and come up for deck access.

Depth
4.5"
Slope
3:12
Retention
50%
Explore the TRAY

Semi-intensive

44 lb/ft² saturated

A seeded native meadow, specified for habitat outcomes and audited for them.

Depth
6"
Slope
2:12
Retention
65%
Explore the MEADOW

Performance

55 lb/ft² saturated

A detention assembly with plants on it. Sized to a hydrograph, not a depth.

Depth
8"
Slope
1:12
Retention
92%
Explore the RETAIN

Intensive

120–190 lb/ft² saturated

Occupied roof: lawn, shrubs, trees, paving, and the structure to hold them.

Depth
12–24"
Slope
1:12
Retention
78%
Explore the TERRACE

Performance

38 lb/ft² saturated

The array is ballasted by the roof it stands in, and runs cooler for it.

Depth
5"
Slope
2:12
Retention
58%
Explore the BIOSOLAR
What changed with the name

We stopped selling depth and started selling outcomes.

01

Sized to a hydrograph

Stormwater systems are specified from the civil release rate. Depth is an output of the calculation, not a product choice.

02

Habitat that is audited

Meadow roofs ship with an ecoregion seed schedule and a two-year establishment audit, so the biodiversity claim survives handover.

03

Load on the drawing

Saturated load, wind uplift and fire class for every assembly live in one table the structural engineer can pull before design development.

Recent roofs

All projects
For architects + contractors

The technical library sits behind one login.

Editable CSI specifications, CAD and Revit details, load tables, wind and fire reports, installation manuals and warranty forms. Access is granted by role, so a contractor sees the handling manual and a specifier sees the drawing set.

  • SpecificationCSI 3-part, editable, per system
  • CAD + BIMDWG detail set · Revit families
  • Performance dataLoad, wind, fire, stormwater
  • InstallationManuals, checklists, sign-off forms