American Hydrotech, Inc.,
303 E. Ohio Street, Chicago, IL 60611
Phone: 800-877-6125 Fax: 312-661-0731

Extensive Garden Roof Assembly Projects

Extensive green roofs only require a shallow growing media depth,
generally as little as 3” - 4”, and therefore add little weight
(typically 18-34 lb/sf wet weight) to the roof structure below.

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Ballard Library - WA	Vancouver Library - BC	Oak Park Library - IL	29 Garden Street - MA

Intensive Garden Roof Assembly Projects

Intensive green roof designs usually consist of a mixture of hard
and soft landscaping. It is therefore important that the selected drainage/retention layer can support any type of landscape – from
roadways and paths, to soil and trees, so as to permit excess water
to drain unobstructed underneath.

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Schwab Hospital - IL	601 Congress - MA	LDS Conference Ctr. - UT	Mashantucket Pequot - CT

Sloped Garden Roof Assembly Projects

Extensive green roofs can be applied to slopes with a pitch of
up to 12:12 or 45 degrees, provided the appropraite measures
are taken to cope with the shear forces and soil retention.

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Gwinnett Heritage Ctr. - GA	Ballard Library - WA	ASLA Headquarters - DC	Tyner Interpretive Ctr. - IL