RENOVATE by Berkowitz Window Retrofit System
Oklahoma City, OK
Sandridge Energy
American Glass & Metal
Number of Openings
Total Square Footage of Glass
65,538 square feet
Total Square Footage of Building
490,000 square feet
RbB Products
Platinum Plus II

The Building

“Oklahoma City faces relatively cool winters, but summer days are consistently hot and can bring extreme heat,” Niggemeyer said. “By adding a passive low-e glass to minimize heating costs, and a solar control low-e glass to minimize cooling costs, we expect the performance of the windows to significantly improve the overall energy efficiency of the building.”

Fred Niggemeyer, of Oklahoma City-based Frankfurt Short Bruza Associates, said the team specified the Renovate Platinum Plus II system to help improve the year-round thermal and energy performance of the windows.

The Renovate by Berkowitz window/curtainwall retrofit system is being used to update SandRidge Tower in Oklahoma City, headquarters of SandRidge Energy, Inc. The 30-story skyscraper is the centerpiece of the corporate campus for the independent oil and gas company.


The Challenge

Retrofitting the 2,808 windows in a fully occupied building without disrupting the tenants.

“Because the Renovate system installs from the inside of the building, the building has remained enclosed,” “Also, the exterior skin of the building has not been impacted allowing it to maintain its original architectural character.” – Fred Neggemeyer, Frankfurt Short Bruza Associates

The Fix

Because Renovate installs from the inside in about twenty minutes there is no need to vacate or relocate tenants for the long-term.

Rick Brown, director of facilities & construction at SandRidge Energy, said he expects the Renovate system to perform as designed, based on his own evidence.

“During the first week of March, the early-morning temperatures were still in the 20s in Oklahoma City,” Brown said. “We used an infrared temperature gun to compare the internal surface temperatures of existing and retrofitted windows. Needless to say, the existing quarter-inch glass was in the 20-degree range, while the windows with the Renovate system were in the 60s.”


Certified Installer

American Glass & Metal