Component

Rooftop Garden System

Reference Section

structural support

Steel / wood structure, ply wood deck

Steel / wood structure, ply wood deck

vapour control layer

Asphalt-based membrane

Asphalt-based membrane

thermal insulation

75mm (3in) thick mineral fibre board

75mm (3in) thick mineral fibre board

support panel

12.5mm (0.5in) fibreboard

12.5mm (0.5in) fibreboard

Membrane

250g polyester reinforced modified bituminous membrane formulated with root repellant agent

250g polyester reinforced modified bituminous membrane

drainage layer

Polystyrene extruded panel, 0.75kg/m² (0.15psf), 36mm (1.5in) thick

N/A

filter membrane

Polyethylene/polyester non-woven mat, 160g/m² (0.032psf)

N/A

growing medium

150mm (6in) light weight soil

N/A

Vegetation

wild flower meadow

N/A