Plaza Condition Assessment & Remediation

Date: January 25, 2018 4:00pm
Location: SGH DC

Thursday, January 25, 2018

Simpson Gumpertz & Heger
1828 L Street NW, Suite 950 
Washington, DC 20036
Parking for a fee is available in the 1828 L Street NW garage. Garage height restriction is 6 ft.

4:00 - 4:30PM Registration & Refreshments
4:30 - 6:00PM Presentation & Discussion
6:00 - 7:00PM Cocktail Reception

Participants will earn 1.0 AIA CES Learning Unit (LU/HSW) for their attendance. Attendance is free and open to all; please invite colleagues. We will serve refreshments and hors d'oeuvres. Space is limited to the first 60 guests to register.


Every plaza is unique, except for the fact that no plaza waterproofing system lasts forever. Reconstructing a plaza assembly is often expensive because it includes removing and replacing overburden elements such as paving, plants, soils, and other landscaping features. These projects are disruptive, as they involve construction in routinely trafficked common spaces such as entrance walkways, courtyards, ramps, and loading docks. The wide-ranging conditions that impact decision making on such a project – combined with owners’ and property managers’ varying tolerances for service life and performance expectations – make each plaza remediation unique. Nonetheless, enduring chronic leakage and delaying assessment and remediation of an underperforming plaza may lead to deterioration of the structure, which only serves to exacerbate repair extents, costs, and disruption. The condition of existing plaza waterproofing must be evaluated to determine whether repair or replacement is appropriate and to collect the information needed to design effective and durable repairs or replacement.

After attending this seminar, participants will be able to: 

  • Understand the factors that drive the need for a plaza condition assessment and remediation project 
  • Recognize the implications deferred maintenance may have on an underperforming plaza assembly and the underlying building structure
  • Identify effective tools and techniques to assess and remediate plaza assemblies and building structure deterioration
  • Discuss case studies of plaza waterproofing assessment and remediation of varying scales and complexities


Joseph D. Rogers, P.E. | Senior Project Manager
Joseph D. Rogers is a Senior Project Manager in SGH’s Washington, DC, office with more than twelve years of experience investigating and evaluating building enclosures. He specializes in rehabilitation design, including roofing, plaza and below-grade waterproofing, and flooring and wall systems. His work includes building enclosure investigation and analysis, design, and construction administration and monitoring. Joe has managed many of SGH’s largest plaza investigation and rehabilitation projects. He is also a lecturer in the department of civil engineering at Johns Hopkins University.
R. Scott Silvester, P.E. | Associate Principal
Scott Silvester is an Associate Principal in SGH’s Washington, DC, office. His projects involve designing, investigating, and rehabilitating structures of all types and materials. As part of his rehabilitation work, Scott regularly employs tools and techniques to assess the condition of reinforced concrete structures and design repairs, particularly where plazas chronically leak. He has conducted plaza condition assessments and recommended repairs on a range of plaza and parking structures in Washington, DC; Maryland; Virginia; and elsewhere. His structural investigation practice also includes assisting with the resolution of disputes by providing expert opinions, reports, and testimony. 


  • Owners
  • Facilities Managers
  • Property Managers
  • Contractors
  • Architects
  • Attorneys