Specifications

Green Roof Type: Extensive

Area: 666 sq ft

Exposure: Partial Shade on 3 sides by adjacent buildings.

Existing Roof Ballast lbs/sq ft (Removed): 11

Dry lbs/sq ft for 6" depth: 16.1

Saturated lbs/sq ft for 6" depth: 24.9

R value for dry 6" depth without plants: 4

Filter Fabric: Lightweight landscaping fabric

Drainage Layer: American Wick Drain's DBR-50 RootBlock

Composition of lowest 4" of substrate: 36.5% Perlite, 36.5% Vermiculite, 12% Clay Particles (a product called Turface), and 15% Compost.

Composition of top 2" of substrate: 100% compost

Plants Species Seeded: 74

Root Stocks Planted: 250

Current Total Roof Load: Forthcoming

Roof Live Load: Forthcoming

Total Project Cost: 1375