Topeka, KS

Kansas State Capitol


Officially completed in 1903, the Kansas State Capitol is the impressive home to the state’s government offices.  The building is topped with a striking copper dome over a central rotunda that joins four wings.  As part of a major multi-phase rehabilitation, SGH consulted on the copper roofing replacement design.

Working with the project architect, SGH reviewed their proposed design for replacing the copper roofs over the four main wings, the main dome, and the lantern dome.


SGH provided recommendations to improve constructability and performance. Our recommendations addressed the following:

  • Detailing the attachment of new roofing to existing substrates and evaluating substrate conditions to accommodate underlayment at the decorative roof and dome roof profiles
  • Clarifying copper jointing and attachment requirements to aid pricing and construction efforts
  • Detailing expansion joints to accommodate thermal movement of roofing and flashing
  • Clarifying the scope of work for replacing complex copper ornamentation
  • Selecting an alternate roofing system for the low-slope lantern cornice that was not suitable for copper due to thermal expansion concerns
  • Specifying removal of stone balustrades, allowing for continuous through-wall flashing at vulnerable built-in gutters

Project Summary



Completion Date
Repair & Rehabilitation | Preservation
Building Enclosures
Treanor Architects
Specialized Capabilities
Preservation | Roofing & Waterproofing

Key team members

Nick Floyd
Nick Floyd
Senior Project Manager
Niklas Vigener
Niklas Vigener
Chief Technical Officer