Contact Us

Email us
Phone: +1.678.367.0981
Fax: +1.240.547.1795

Mailing Address

International Society of Arboriculture
PO Box 191
Annapolis Junction, MD 20701
United States

Physical Address

International Society of Arboriculture
270 Peachtree St NW, Suite 1900
Atlanta, GA 30303
United States

Order Delays Due to Physical Inventory

Due to ISA's annual physical inventory, orders placed between
2 p.m. EDT, Thursday, 20 June 2019, and 11:59 p.m. EDT, Friday 28 June 2019, will not ship until the week of 1 July 2019

Please plan your ordering accordingly.

We will resume regular turnaround times
1 July 2019.

Thank your for your patience.

Questions? Please call the customer service team at (678) 367-0981.

    Climbers' CornerTree Academy

    Anchoring Trees on Elevated Structures


    Many cities are setting tree cover canopy goals as part of their greening campaigns.  Ground-level tree planting is relatively straight forward, but more tree planting opportunities exist on rooftops and other elevated structures which comprise a significant percentage of urban impervious surface. These largely barren and underutilized spaces in the heart of our cities pose many problems; they degrade air and water quality, contribute to the urban heat island effect, and provide almost no environmental benefit.

    These wasted elevated spaces are being transformed by installing green (vegetated) roof systems; an industry that has aggressively been expanding by more than 100% in the past three years. The functionality of these rooftop oases can be dramatically increased when complimented with large maturing trees. 

    However, growing and anchoring trees on elevated structures presents many challenges for the arboricultural industry. In this presentation, we will define and explore these concepts.  We will show you how increasing your knowledge of various tree anchoring systems can add value to any green roof design and implementation team which can expand your client base in this rapidly growing industry.


    Jason Lubar is the Associate Director of Urban Forestry at Morris Arboretum of the University of Pennsylvania. He is an ISA PennDel Chapter Board Member and CoR Representative, serves on Penn-Del’s Nursery Quality Task Force, and is a Board Certified Master Arborist and a member of the American Society of Consulting Arborists. He also is on the Executive Board and is treasurer of the Pennsylvania’s Urban and Community Forestry Council.

    Climbers' CornerTree Academy

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