PGT Commercial
Florida DBPR
Approved
Impact Rating LMI
Design Pressure +90/-120 psf
NFRC Certified
Made in Florida
PGT Impact Storefront Window SS 3520 (SLIMFRONT)
PGT's aluminum impact storefront and entrance door system for mid-rise commercial envelopes.
Taller-height SLIMFRONT variant of the SS 3500 storefront window, reaching 180-inch panel heights via stacked mullion configuration for two-story envelopes.
Florida DBPR
Approved
Impact Rating LMI
Design Pressure +90/-120 psf
NFRC Certified
Made in Florida
PGT Custom Windows & Doors
Product photography coming soon
Frame finish
Black
Bronze
Clear Anodized
White
Custom
Impact protection, built for South Florida
The SS 3520 SLIMFRONT is PGT's taller-height variant of the SS 3500 storefront window, reaching 180-inch panel heights via a stacked mullion configuration for two-story envelope glazing. Same 5-inch frame depth and 90 psf positive / 120 psf negative design pressure with LMI impact certification.
- Florida Building Code product-approved
- Aluminum frame engineered for strength and durability
- Large-missile impact-rated laminated glass
- Energy-efficient Low-E insulated glass options to control heat gain
- Corrosion-resistant finishes for coastal applications
- Professionally installed across South Florida by Armor Pro
Grille Styles
1" Flat/Flat (Laminated Glass)13/16" Contemporary SDL (Laminated Insulating Glass)5/8" Grid Between Glass (Laminated Insulating Glass)2" Flat (Laminated Glass)1" Flat Ogee (Laminated Glass)
Impact Protection
Tested to withstand hurricane wind-borne debris
Engineered Strength
Built and tested to Florida product-approval standards
Energy Efficient
Low-E insulated glass options reduce heat gain
Corrosion Resistant
Coastal-grade finishes for salt-air durability
Limited Warranty
Manufacturer warranty plus Armor Pro install workmanship
At a Glance
Frame Material
Aluminum
Max Size
180 x 180 in
Design Pressure
+90/-120 psf
U-Factor
1.08
SHGC
0.32–0.65
Visible Trans.
0.01–0.74
Sizes & Pressures
| Configuration | Max size | Design pressure |
|---|---|---|
| Impact Storefront Window | 180 x 180 in | +90/-120 psf |
Sizes shown are actual DLO frame size.
Glass & Energy Performance
| Glass package | U-Factor | SHGC | VT | CR |
|---|---|---|---|---|
| Blue | 1.08 | 0.462 | 0.447 | 17 |
| Bronze | 1.08 | 0.438 | 0.293 | 17 |
| Clear | 1.08 | 0.645 | 0.735 | 17 |
| Green | 1.08 | 0.51 | 0.617 | 17 |
| Gray | 1.08 | 0.384 | 0.254 | 17 |
Performance Certifications
- FL46559
Related Products
More models in the PGT Commercial.
Comparable from Other Brands
Other storefront window models Armor Pro installs.
Frequently Asked Questions
The SS 3520 SLIMFRONT is the taller-height variant of PGT's SS 3500 storefront window, reaching 180-inch panel heights through a stacked mullion configuration for two-story envelope glazing. It shares the same 5-inch frame depth and the same 90 psf positive / 120 psf negative design pressure with LMI impact certification as the SS 3500. Armor Pro specs the SS 3520 where a wall runs taller than the SS 3500's 144-inch limit and a continuous two-story storefront look is wanted.
Yes, the SS 3520 SLIMFRONT carries LMI (Large Missile Impact) certification and is HVHZ-approved, with its laminated impact glass tested to resist wind-borne debris during a hurricane. It's part of PGT's Florida Product Approved Commercial storefront system for High-Velocity Hurricane Zone envelopes. We'll confirm the exact approval document and design pressure that apply to your opening at quote.
The SS 3520 reaches panel heights up to 180 inches via a stacked mullion configuration, with widths up to 180 inches as well, all on the same 5-inch aluminum frame as the SS 3500. Every configuration holds 90 psf positive and 120 psf negative design pressure with LMI impact certification. We'll lay out the stacked-mullion arrangement that fits your two-story opening and verify the rating when we quote.
The SS 3520 holds a U-factor of 1.08 across packages, with SHGC ranging from about 0.32 on a tinted SC Solargray or Graylite II buildup up to 0.65 on clear glass, visible transmittance up to 0.74, and a condensation resistance of 17. It uses a 9/16-inch laminated or 1-3/16-inch laminated insulating glass makeup with aluminum-and-steel-reinforced framing for the taller spans. For South Florida sun we usually recommend a lower-SHGC tint like Solargray, Solarbronze, or Graylite II to control heat gain on a large two-story glass wall.
The SS 3520 SLIMFRONT comes in standard Black, Bronze, Clear Anodized, and White finishes, with custom colors available. Grid choices include a 1-inch flat/flat, a 13/16-inch contemporary SDL, a 5/8-inch grid between glass, a 2-inch flat, or a 1-inch flat ogee, depending on the glass package. We'll match the finish and grid to the SS 3500 windows and SE 3550 entrance door so a multi-story storefront stays visually consistent.
There's no flat price because installed cost depends on the panel size up to 180 by 180 inches, the number of stacked-mullion bays, the glass package and tint, the finish and grids, and the substrate and condition of the existing two-story opening. Tying the storefront into an SE 3550 entrance also factors in. Armor Pro gives a free, no-obligation estimate; we'll measure the envelope and price the SS 3520 SLIMFRONT for your project.
PGT Commercial is an aluminum impact storefront system, not a residential window line. It's a coordinated set — two storefront windows (the SS 3500 and the slimmer-sightline SS 3520 SLIMFRONT) and a matching SE 3550 entrance door — all on a shared 1.75 by 5 inch aluminum frame. It's sized for the first- and second-floor envelopes of mid-rise condos, hotels, schools, and offices, so a building's lower-floor glazing and doors come from one Florida-approved assembly under one warranty.
Storefront is a heavier, fixed-glazed aluminum framing system built for the larger spans and foot-traffic doors of commercial ground floors, where a residential operable window would run out of span or rating. The PGT Commercial windows are fixed (non-operable) and the SE 3550 is a pedestrian entrance door, all designed to meet at the mullion for a continuous-sightline elevation. We use this system for light-commercial work rather than houses.
PGT has built impact windows and doors in Venice, Florida since 1980 and is the largest impact-window and -door manufacturer in the country. It was the first company to develop impact-resistant products that met Miami-Dade County's hurricane code after Hurricane Andrew, and the line is engineered specifically for Florida conditions. PGT is now part of the MITER Brands family, alongside WinDoor, ECO, and NewSouth, but the products are still made in Florida under the PGT name.