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Center Glazed Storefront Systems

Fabrication and installation labor costs have always been a decisive factor in selecting framing systems for storefront projects. United States Aluminum offers cost efficient versatile Center Glazed Systems with clean lines and superb performance. Series 400SF, Series 450SF, and Series 451SF may be interior or exterior glazed. A top load E.P.D.M. gasket is used to position and weatherseal the glass in the aluminum pocket. Center Glazed Systems are compatible with most United States Aluminum entrance doors.

Key Features:

  • Center glazed storefront system options: 1-3/4" (44.45 mm) x 4" (101.6 mm) frame; 1-3/4" (44.45 mm) x 4-1/2" (114.3 mm) frame; 2" (50.8 mm) x 4-1/2" (114.3 mm) frame
  • Series 400SF & 450SF support 1/4" (6.4 mm) or 3/8" (10 mm) glazing infills and Series 451SF supports 1" (25.4 mm) glazing infills
  • Screw spline assembly
  • Shear block assembly
  • Stacking installation option
  • Full range of accessory components
  • Available in an array of architectural coatings and anodized finishes


Series 400SF

1-3/4" (44.45 mm) x 4" (101.6 mm) Center Glazed Storefront





Series 450SF

1-3/4" (44.45 mm) x 4-1/2" (114.3 mm) Center Glazed Storefront





Series 451SF

2" (50.8 mm) x 4-1/2" (114.3 mm) Center Glazed Storefront






ArcticFront™ Series 45X Dual Thermal Storefront System

The ArcticFront™ Series 45X High Performance Storefront System offers optimal thermal performance with the installer-friendly features of a traditional storefront. The NFRC-rated ArcticFront™ Series 45X Storefront can produce U-factors ranging from 0.37 using 1" (25.4 mm) low-E insulating glass, to as low as 0.19 using specially configured insulated glass units. The Series 45X utilizes the new ArcticFront™ Series 375-T High Performance Medium Stile Thermal Doors and is compatible with all U.S. Aluminum Thermal Windows.

Key Features:

  • Dual Polyurethane Thermal Breaks
  • 2" (50.8 mm) x 4-1/2" (114.3 mm) Thermal Frame
  • U-Factors as Low as 0.19 Using Insulating Glass Units
  • Screw Spline or Shear Block Assembly
  • 1" (25.4 mm) Glazing Infills
  • Tested in Accordance with AAMA 507
  • NFRC Rated
  • Available in Anodized or Painted Finishes
  • Interior or Exterior Glazed


Series 45X

High Performance Dual Thermal Storefront






Flush Front™ Storefront Systems

Flush Front™ Systems feature screw race joinery and panel-type installation which allows for shop or job site fabrication. Injection-molded water deflectors at intermediate horizontals and a continuous sill gutter with factory pre-punched weep slots ensure control of any infiltrated water. The plane of the glass may be reversed from exterior to interior or any combination to give these standard systems a custom look. All series may be glazed from the inside or outside using a top load E.P.D.M. glazing gasket. Flush Front™ Series FT offer improved thermal performance using the Poly-Aluminizer™.

Key Features:

  • Flush Front™ storefront system options:
    • 1-3/4" (44.5 mm) x 4-1/2" (114.3 mm)
    • 2" (50.8 mm) x 4-1/2" (114.3 mm)
    • 2" (50.8 mm) x 6" (152.4 mm)
  • Series FF450 supports 1/4"(6 mm) or 3/8" (9 mm) glazing
  • Series FF451, FT451, FF601 & FT601 support 1" (25.4 mm) glazing
  • Flush In, Flush Out, or Combination glazing
  • Exterior or interior glazed
  • Screw race joinery
  • Injection molded water deflectors
  • Factory pre-punched weep slots
  • FT Series thermal versions utilize Poly-Aluminizer™ technology
  • Available in an array of architectural coatings and anodized finishes

Series FF450

1-3/4" (44.45 mm) x 4-1/2" (114.3 mm) Flush Front™





Series FF451

2" (50.8 mm) x 4-1/2" (114.3 mm) Flush Front™





Series FT451

2" (50.8 mm) x 4-1/2" (114.3 mm) Thermal Flush Front™





Series FF601

2" (50.8 mm) x 6" (152.4 mm) Flush Front™





Series FT601

2" (50.8 mm) x 6" (152.4 mm) Thermal Flush Front™






Series OST451 & OST451 SSG Thermal Storefront System

The Series OST451 Thermal Storefront System is engineered for optimal thermal performance and California Title 24 compliance. Offset glazing produces a flush appearance, while a slim 2" (50.8 mm) face trim and 4-1/2" (114.3 mm) depth offer a material cost advantage. The OST451 Storefront is a straight-cut and stack system. No notching is required, which expedites installation and reduces labor.

Additional features include injection molded water deflectors, a continuous head and sill, and a top-load EPDM gasket that permits interior or exterior glazing. The available OST451 SSG model provides uninterrupted horizontal glass spans for a streamlined aesthetic.

Key Features:

  • California Title 24 Compliant
  • Slim 2" (50.8 mm) Face Trim Reduces Costs
  • Stacking System with No Notching Required
  • Thermally Broken
  • U-Factors as Low as 0.26
  • For 1" (25.4 mm) Insulating Glass
  • Continuous Head and Sill
  • Suitable for Window Wall Applications

Series OST451 and OST451 SSG

California Title 24 Compliant Thermal Storefront






Series IT451 Center Glazed Storefront

Series IT451 offers improved thermal performance using the Poly-Aluminizer™. United States Aluminum offers cost efficient versatile Center Glazed Systems with clean lines and superb performance. Series IT451 may be interior or exterior glazed. A top load E.P.D.M. gasket is used to position and weatherseal the glass in the aluminum pocket. Center Glazed Systems are compatible with most United States Aluminum entrance doors.

Key Features:

  • 2" (50.8 mm) x 4-1/2" (114.3 mm) thermal frame
  • 1" (25.4 mm) Glazing infill
  • Struct-Link™ thermal break
  • Screw spline assembly
  • Shear block assembly
  • Stacking installation option
  • Full range of accessory components
  • Available in anodized or painted finishes
  • Unit-Glazed systems available


Make a bold impression with premium U.S. Aluminum storefront systems from C.R. Laurence. These aluminum-framed glass storefront systems are crafted for the performance, durability, and modern design that today’s commercial projects demand. Choose from multiple glazing options that are all engineered for smooth integration with CRL entrance doors and curtain walls. Find flush front options for sleek buildings, such as modern corporate offices or museums and art galleries. Center glazed versions are a popular, less costly option for mall storefronts, strip malls, and convenience centers. Offset glazed framing is ideal for projects requiring durable, clean facades, like government centers and higher education buildings. From building a new storefront or upgrading an existing one, our commercial glass and aluminum storefront systems provide clean sightlines, reliable structural integrity, and compatibility for a wide range of entrance configurations.

Perfect for everything from boutique shop storefronts to large-scale retail store fronts, our systems help curate a welcoming, high-impact façade. With a versatile selection of framing depths, finishes, and thermal performance levels, CRL’s storefront systems meet the needs of both ground-up construction and renovation projects. Available thermal options include advanced solutions, such as dual thermal breaks and Poly-Aluminizer™ technology, engineered for commercial energy efficiency. Our glass storefront systems, in conjunction with our storefront window systems, are designed for simplified installation and long-term performance, making them a top choice among glazing contractors and architects alike.

Explore our full range of glass entryway systems, including mall front clamps, door stops, and holders for seamless project integration. From sleek storefront wall solutions to comprehensive commercial glass storefront systems, every product is backed by decades of engineering expertise. Elevate your storefront business with CRL’s industry-leading commercial storefront systems, built to perform and impress.

U.S. Aluminum Customer Service