West Orange City Zoning Code

A green roof shall consist of four layers: a waterproof membrane, a layer of insulation, a drainage layer, and the growing medium (substrate). Additionally, a protective layer of PVC or other suitable material may be placed beneath the growing medium to protect against roots penetrating the waterproofing layer.

The growing medium shall be a thin, lightweight medium suitable for planting wildflowers or grasses; for example, a mix of expanded shale and/or sand with 10% humus.

Plantings on green roofs shall be shallow-rooted, drought-tolerant species that thrive in thin, nutrient-poor soils and will not require irrigation; for example, mosses and grasses.

Green roofs shall be subject to approval by the Township Engineer and shall be subject to periodic inspection.