Fortify Series
Miami-Dade NOA
Design Pressure +30/-60 psf
NFRC Certified
Made in Florida
CWS Fortify 320 Aluminum Horizontal Slider (Flange Frame)
CWS's coastal-rated aluminum non-impact line, engineered for high design pressures.
New-construction (nail-fin) variant of the Fortify aluminum non-impact horizontal slider, opening side-to-side for wider residential openings.
Miami-Dade NOA
Design Pressure +30/-60 psf
NFRC Certified
Made in Florida
Custom Window Systems
Product photography coming soon
Built for South Florida homes
The CWS-320 Flange is the new-construction (nail-fin) frame variant of the Fortify aluminum non-impact horizontal slider window, opening side-to-side for wider residential openings.
- Florida Building Code product-approved
- Aluminum frame engineered for strength and durability
- 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
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
125 x 63 in
Design Pressure
+30/-60 psf
U-Factor
1.16
SHGC
0.28–0.7
Visible Trans.
0.06–0.72
Sizes & Pressures
| Configuration | Min size | Max size | Design pressure |
|---|---|---|---|
| Horizontal Slider (Flange) | 14 x 23 in | 125 x 63 in | +30/-60 psf |
Sizes shown are actual DLO frame size.
Glass & Energy Performance
| Glass package | U-Factor | SHGC | VT | CR |
|---|---|---|---|---|
| Blue | 1.16 | 0.457 | 0.573 | 12 |
| Bronze | 1.16 | 0.407 | 0.253 | 12 |
| Clear | 1.16 | 0.685 | 0.71 | 12 |
| Green | 1.16 | 0.51 | 0.61 | 12 |
| Gray | 1.16 | 0.365 | 0.17 | 12 |
U-Factor / SHGC shown without grids; add-grid values vary slightly. Confirm exact ratings for your opening at quote.
Performance Certifications
- 24-0116.16
Related Products
More models in the Fortify Series.
CWS Fortify 310 Aluminum Single Hung (Flange Frame)
Single Hung
See price & specs
CWS Fortify 320 Aluminum Horizontal Slider (Fin Frame)
Horizontal Roller
See price & specs
CWS Fortify 330 Aluminum Fixed (Picture)
Fixed Window
See price & specs
CWS Fortify 380 Aluminum Sliding Glass Door (No-Steel)
Sliding Glass Door
See price & specs
Comparable from Other Brands
Other horizontal roller models Armor Pro installs.
PGT Custom Windows & Doors
PGT WinGuard Aluminum Horizontal Roller HR7710A
See price & specs
Eastern Architectural Systems
EAS 176 Bertha Horizontal Roller Impact Vinyl
See price & specs
ES Windows
ES Windows Prestige ES-P300 Sliding (TB Retrofit)
See price & specs
ECO Window Systems
Eco-Guard Horizontal Rolling Series 200
See price & specs
Frequently Asked Questions
The CWS-320 Flange is the new-construction (nail-fin) frame variant of the Fortify aluminum horizontal slider, opening side-to-side for wider residential openings. The nail-fin attaches to the framing in new walls or full tear-out installations, which is different from the Fin variant built for masonry block retrofits. We confirm the Flange is the right frame for your wall type when we measure.
No, the Fortify 320 Flange is an aluminum non-impact horizontal slider, so it is not approved for the High Velocity Hurricane Zone (Miami-Dade and Broward) by itself. It is engineered for high design-pressure coastal performance without the cost of impact glazing. If your project requires impact protection, we'll explain your options at quote, including pairing or stepping up to an impact product.
The CWS-320 Flange slider runs from 14 by 23 inches up to a maximum of 125 by 63 inches, with a design pressure rating of +30/-60 psf. The wide horizontal range suits large new-construction openings where you want a broad view. We confirm the exact size and required design pressure for each opening before ordering.
Yes, the CWS-320 Flange is documented under Miami-Dade NOA 24-0116.16, which covers its tested design-pressure performance as a non-impact aluminum slider. Keep in mind an NOA on a non-impact window is a structural design-pressure approval, not an impact (large-missile) approval for the HVHZ. We supply the NOA on your quote for the building department.
The Flange (nail-fin) variant is the right choice for new construction or full-frame replacement where the fin can fasten to wood or framing, while the Fin variant is built to retrofit into existing concrete or block openings. Both are the same Fortify 320 aluminum non-impact slider with the same +30/-60 psf design pressure. Armor Pro determines the correct frame type when we inspect your walls.
Installed price depends on the window size, the number of openings, and your installation type, so we don't quote a flat rate. As an aluminum non-impact slider, the Fortify 320 generally costs less than an impact-glazed equivalent while still delivering coastal design-pressure performance. Armor Pro provides a free, no-obligation estimate after measuring your project.
No. Fortify is aluminum non-impact, engineered for coastal addresses that need high design-pressure performance and corrosion resistance but where the code does not actually require impact glass. It is the step between Comfort Shield vinyl non-impact and the impact Hurricane Guard line. If your opening must carry impact glazing on its own, we'd move you to Hurricane Guard instead.
Only in a limited way. The 380 sliding glass door is HVHZ-eligible when it is paired with hurricane shutters, which satisfy the opening-protection requirement in place of impact glass. The Fortify windows are not HVHZ products. So in Miami-Dade or Broward, Fortify only works on a shuttered door application, and we confirm that path before specifying it.
CWS (Custom Window Systems) is a Florida manufacturer founded in 1986 and headquartered in Ocala, with additional plants in Miami, Medley, and Jacksonville totaling more than 700,000 square feet. Because the line is engineered and built in Florida around the state's hurricane code, the products are designed for our climate rather than adapted to it. We install and service CWS products throughout South Florida.