View after exisiting paver removal to review EPDM membrane’s condition

View after exisiting paver removal to review EPDM membrane’s condition

Lay-up of the new EPDM membrane

Lay-up of the new EPDM membrane

View of new system: Fan-fold EPS covered with loose-laid 90mil EPDM

View of new system: Fan-fold EPS covered with loose-laid 90mil EPDM

View of new system installation

View of new system installation

Overview of completed system

Overview of completed system

Overview of completed system

Overview of completed system

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K&H was contacted by Management to assess the condition of the existing ballasted (pavers) loose-laid single ply EPDM roofing system of the 20 S Wacker building following numerous reports of leaks into the office space below.  After our review Ownership took the initiative of replacing the entire system “in-kind”.  However in order to satisfy code requirements 2” of insulation and a heavier EPDM (90mil) was installed prior to the reinstallation of the original pavers.

Mercantile Exchange - 20 South Wacker Roof Assessment and Replacement

Chicago, IL

Building Envelope Roofing Systems

Commercial

Tishman Speyer

William Benesch