Security Glazing Systems
Expert installation of blast-resistant and security glazing systems. GSA-rated, UL 752 ballistic-rated, and forced entry resistant glass for government buildings, embassies, and high-security commercial facilities across DC, Virginia, and Maryland.
Security Glass Systems
From GSA-rated laminated glazing for federal offices to combined blast and ballistic systems for embassies, we install every level of security glass.
Multi-ply laminated glass tested to GSA blast standards. Achieves performance conditions 1 through 3b for federal buildings.
Ballistic-rated glazing from Level 1 (9mm handgun) through Level 10 (.50 caliber rifle).
Glazing tested to ASTM F1233 and State Department SD-STD-01.01. Resists sustained physical attack with blunt and edged weapons.
Retrofit security film with mechanical anchoring to existing window frames. Provides fragment retention for existing glazing without full window replacement.
Complete curtain wall systems engineered for blast loading. Includes blast-rated mullions, anchors,
Dual-rated systems meeting both blast resistance and ballistic protection requirements. Used in the highest-security applications including embassies,
Engineering Detail
Blast-resistant glazing systems are engineered to absorb and dissipate explosive energy through controlled deformation. The laminated glass plies crack to absorb energy while the interlayers retain fragments, preventing deadly glass projectiles.
An explosion generates a high-pressure shock wave followed by a negative pressure phase (suction). The blast wave loads the glass with positive pressure measured in pounds per square inch (psi), while the negative phase can pull fractured glass outward. Blast-resistant glass must perform under both phases.
Multiple glass plies bonded with thick interlayers create a composite system. Each glass ply absorbs energy by cracking in a controlled pattern. The PVB or SGP interlayers stretch and deform to retain the fragments, preventing glass from becoming airborne projectiles.
SentryGlas Plus (SGP) ionoplast interlayer is 5 times stronger and 100 times stiffer than standard PVB. SGP provides superior post-blast retention, keeping the glass panel intact in the frame even after multiple plies have fractured. It is the preferred interlayer for high-threat blast applications.
The glass edge engagement (bite) in the frame is critical. Blast-rated frames require deeper bite dimensions than standard frames to prevent the glass from pulling out under blast loading. The frame-to-wall anchorage must transfer the full blast load to the building structure.
Some installations add steel cable catch systems behind the glass to arrest any panels that separate from the frame during extreme blast events. The cables span the window opening and provide a secondary barrier against glass projectile penetration.
Blast-resistant glazing is validated through full-scale arena blast testing where actual explosives are detonated at measured standoff distances. High-speed cameras and pressure gauges document the glass response. Each system receives a GSA hazard rating based on fragment trajectory and velocity.
Applications
GSA-rated blast glazing for federal courthouses, agency headquarters, IRS processing centers, and other government offices. Meet ISC Security Design Criteria for minimum standoff distances.
State Department SD-STD-01.01 forced entry and blast resistant glazing for US embassies, consulates, and diplomatic residences worldwide. Combined blast, ballistic, and forced entry ratings.
Blast and ballistic-rated glazing for military command centers, base entry control points, guard booths, and force protection applications. Tested to unified facilities criteria.
Blast mitigation glazing for bank headquarters, trading floors, data centers, and critical financial infrastructure. Protect personnel and operations from vehicle-borne explosive threats.
Blast-rated glazing for data center control rooms and visitor areas. Protect critical IT infrastructure from blast events while maintaining required fire ratings and environmental separation.
Blast-resistant glazing for airport terminals, transit stations, and port facilities. Large-area glazing systems engineered for public safety in high-profile targets.
Why Choose Us
With decades of experience installing blast-resistant glazing in federal buildings, embassies, and critical facilities across the Washington DC metro area, Expert Glass Repair is the trusted choice for security glazing in the nation's capital.
All blast glazing systems meet GSA Standard Test Method and ISC Security Design Criteria. Certified performance conditions documented for every installation.
Decades of experience installing security glazing in federal buildings, embassies, and government facilities throughout the Washington DC metro area.
Blast event or security breach? We provide emergency board-up and temporary glazing to secure your facility immediately while permanent replacement is fabric...
Full commercial general liability and workers compensation. Security clearance coordination for classified facilities. Over 20 years of security glazing experience.
Common Questions
Blast-resistant glass is a multi-ply laminated assembly consisting of two or more glass plies bonded with thick interlayers of polyvinyl butyral (PVB) or ionoplast (SentryGlas/SGP). The interlayers hold the glass fragments together after breakage, preventing deadly shards from becoming projectiles. Higher-rated systems may include polycarbonate layers for additional retention.
The GSA uses the ISC Security Design Criteria and GSA Standard Test Method for Glazing and Window Systems Subject to Dynamic Overpressure Loadings. The hazard rating ranges from 1 (no break) to 5 (hazardous failure). GSA requires a performance condition of 3b or better for most federal buildings.
Yes. Options include security window film with mechanical attachment systems, laminated glass replacement panels, or complete window system replacement. Full window replacement with blast-rated frames and glazing is most effective, as the frame-to-wall connection is critical for blast performance.
Blast-resistant glass withstands pressure waves from explosions, retaining fragments to prevent injuries. Bullet-resistant glass stops specific projectile threats per UL 752 levels 1 through 10. Some high-security applications require dual-rated glazing meeting both standards.
Thickness varies from about 3/8 inch for basic blast mitigation to over 2 inches for high-threat military applications. A typical GSA-rated system for a federal office building uses 1/2 to 3/4 inch laminated glass. Required thickness depends on design blast load, glass size, and edge support conditions.
Yes. We install blast-resistant glazing in federal buildings, government offices, embassies, and military facilities throughout Washington DC, Northern Virginia, and Maryland. We work with GSA-certified systems and are fully insured with over 20 years of experience.
About Blast-Resistant Glass
Washington DC presents unique security challenges that few other cities face. As the seat of federal government, home to hundreds of embassies and consulates, and a high-profile target, the DC metro area has one of the highest concentrations of blast-resistant glazing installations in the world. From the GSA-mandated security upgrades at federal courthouses to the State Department-specified forced entry systems at diplomatic missions, blast-resistant glass is a critical component of building security throughout the region.
The General Services Administration requires all new federal construction and major renovations to meet the Interagency Security Committee (ISC) Security Design Criteria. For glazing, this means blast-resistant systems tested to the GSA Standard Test Method, achieving a performance condition of 3b or better. The hazard rating scale measures not just whether the glass breaks, but whether the broken glass remains attached to the interlayer and within the frame, preventing occupant injuries from glass fragments.
Expert Glass Repair has installed blast-resistant glazing in federal buildings, embassies, military installations, and critical infrastructure facilities across Washington DC, Northern Virginia, and Maryland. We work with all major blast-rated glazing manufacturers and can specify the correct system for your threat level, standoff distance, and architectural requirements. Fully insured -- full commercial general liability, workers compensation, and same-day COIs.
Service Areas
Security glazing installation and service for government buildings and commercial facilities throughout Washington DC, Northern Virginia, and Maryland.
Blast-resistant glass service for Pentagon City, Rosslyn office towers, Tysons federal buildings, and Northern Virginia government facilities.
Security glazing for NSA campus, FDA headquarters, NIH facilities, and Maryland federal buildings.
Blast-resistant glass for federal courthouses, embassy row, K Street government offices, and DC critical infrastructure.
Ready to Get Started
Blast-resistant glass is the critical barrier between explosive threats and building occupants. Contact Expert Glass Repair for a free security glazing consultation for your government or commercial facility.