121 AT/FP-rated storm windows now sit in front of the building’s historic windows.
JS Global installed 121 AT/FP-rated storm windows in front of the existing historic windows of an occupied 750,000 SF federal building in Washington, DC, using non-invasive methods that left the original masonry intact.
The building was fully occupied, historically significant, and home to irreplaceable contents.
JS Global, as prime contractor, installed the AT/FP-rated storm windows in phases, working with preservation specialists, curators, and federal security staff. The team managed abatement, scaffolding, protection, and installation so that the building could keep operating while it was hardened.
Install AT/FP-rated windows without drilling into or scarifying the historic stone.
Work in phases inside a fully occupied building under strict security controls.
Remove asbestos-containing caulk from the stone joints under industrial hygiene oversight.
Keep priceless artwork and sculpture safe while construction went on nearby.
Preservation specialists, curators, industrial hygienists, art-handling experts, and security staff shaped the plan from the start.
Temporary perimeter walls and protective barriers separated work areas from occupants and contents, and artwork was relocated under controlled conditions.
Qualified subcontractors removed asbestos-containing caulk from the stone joints under an on-site industrial hygienist.
Engineered scaffolding with overhead protection, plus custom lifting equipment including a suction lifter, handled the oversized glass units.
Frames were mounted without drilling or scarifying the stone, with extra care around arches and keystone details.
121 AT/FP-rated storm windows now sit in front of the building’s historic windows.
The original masonry stayed intact because the frames were installed without drilling.
Work continued in a fully occupied building under phased, security-controlled access.
The added layer of glass also gives the building an extra layer of insulation.
Neither requirement was allowed to override the other.
Preservation specialists, security staff, curators, and installers worked from the same phased plan, so protection for the building and its contents was part of every phase of the work.
Practical answers about protecting stone, contents, and occupants during a security upgrade.
Share the building’s use, preservation constraints, security requirements, and schedule limits. JS Global will help plan a path that protects both the mission and the structure.
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Federal Registrations JS Global, LLC · UEI LBFFDM94BRM5 · CAGE 1ZB73 · NAICS 236220 Atlantic Design Group, LLC · UEI FM4LWXQN5KQ6 · CAGE 48S09 Top Secret facility clearance. Other Than Small Business. | Headquarters |
JS Global, LLC | Atlantic Design Group
