Impact Casement 128
Built for high-risk hurricane exposure — southeastern coastlines and island projects. The frame is reinforced and the glazing is a multi-layer laminated and tempered build-up designed to stay in the opening after a large-missile strike, so the envelope keeps its integrity and the interior stays pressurised as designed. Tested to the Florida Building Code TAS protocols; approvals are jurisdiction by jurisdiction, so tell us where the project is and we will confirm in writing what this unit is approved for there before you specify it.
Configure your unit, then request a quote — we price it and reply, usually within one business day.
Every unit is made to the opening. Sizes confirmed at quotation.
Low-E1 / E2 / E3 coatings, laminated and tempered build-ups available. We recommend the coating for your climate zone.
No price is shown because every unit is made to order. You will get a written quote for exactly this configuration.
Overview
An outward-opening impact casement on a 128 mm frame, built for high-risk hurricane exposure — the southeastern coastlines and island projects where the envelope is expected to stay intact through a debris strike rather than merely resist wind. It is the operable half of a two-product impact range, specified alongside the pre-assembled impact window wall where an elevation needs openable vents as well as glazed area.
That pairing is the choice to understand. The impact window wall 110 arrives as finished cassettes sized to the floor-to-floor dimension and is largely fixed glazing; this is the unit you can open, on a push-out casement operator, for rooms that need natural ventilation or a code-required opening. Against the Essential push-out casements at 95 mm and 70 mm the operator is familiar but nothing else is: the 128 is a substantially deeper and reinforced frame carrying a multi-layer laminated and tempered build-up instead of a standard insulating unit, and it is specified on storm performance rather than on unit cost.
The glazing is the structure here. Laminated layers bonded to tempered glass are intended to stay in the opening after a large-missile strike — the pane may break, but the interlayer holds the fragments in the frame, so the building envelope keeps its integrity and the interior stays pressurised as designed. The frames are reinforced to carry that build-up and the loads that follow a breach elsewhere on the elevation.
On approvals, read this carefully, because it is the part specifiers get burned on. The range is tested to Miami-Dade NOA standards for impact resistance, water tightness and air infiltration, and to the Florida Building Code TAS protocols. Approvals are granted jurisdiction by jurisdiction, and this unit has no dimensional or performance table published in the catalogue — no sizes, no design pressures, no ratings. Tell us where the project is and what you need it to satisfy, and we will confirm in writing what applies there before you specify it.
| Product line | Impact |
|---|---|
| Material | Aluminum |
| Type | Window |
| Platform | 128 |
| Lead Time | Standard configurations: 18 days in the factory |
Specifications
| Material | Aluminum |
| Platform | 128 |
The platform number is a nominal frame depth in millimetres — contact us for the exact measured section before you detail the opening.
Frame profile & section
Values not listed are pending the manufacturer’s certified test report and are deliberately left blank rather than estimated.
Mounting and frame options
The frame type decides the rough-opening detail, the flashing and how much of the existing wall has to come out. Four are available; tell us the wall build-up and we will specify which one your opening needs.
The standard new-construction frame. The flange laps the sheathing so the unit sets and seals in one operation.
A 1 3/8" flange is available where the cladding build-up needs the extra reach.
Installs over an existing aluminum window frame, so the stucco exterior is left intact. No cutting back and repatching.
Available on selected window types — ask us which of your openings can take it before you price the stucco work.
For full removal, when the existing frame is rotten or damaged and has to come out entirely.
Sets into the existing rough opening, and arrives with the through-the-jamb holes pre-drilled and the screws supplied.
Straps fix to the frame, which lets the unit sit anywhere in the depth of the wall cavity rather than at a fixed setback.
Installs from the interior, and works for both new construction and replacement.
Full CAD details for any of these are available on request for your wall assembly.
Factory-joined combinations for large openings
Multi-unit combinations are joined in the factory and delivered as one assembly, so the joint is made under shop conditions instead of on a scaffold. The joining mullion is 1 1/8" (28 mm) wide and comes in three reinforcement grades, chosen by the height of the window it has to carry. The system is covered by a US patent.
| Suggested window height | Joint width |
|---|---|
| up to 9 ft | 1 1/8" (28 mm) |
| 9 to 11 ft | 1 1/8" (28 mm) |
| 11 to 13 ft | 1 1/8" (28 mm) |
Combinations arrive partly or fully assembled depending on size and shipping method. Tell us the opening and we will confirm which grade your height needs and how the unit will be split for transport, before you price the crane time.
How large combinations are joined →Where a window has to serve as an escape route, three dimensions matter at once — clear width, clear height and clear area — and meeting two of the three is not enough.
Awning units and single tilt-only units cannot be used as escape windows at all, because the sash itself obstructs the opening. If an opening is designated for egress, it needs an operator that swings or turns clear.
The figures above are the manufacturer’s minimums for the product and are NOT a code citation. US residential egress under IRC R310 is a different set of numbers — 5.7 sq ft net clear opening, 24" minimum height, 20" minimum width — and your jurisdiction’s adopted code governs, not this page. Send us the opening schedule and the address and we will confirm in writing which units satisfy the code that applies to you.
Egress requirements in full →Installation details
Timber frame, masonry and board substrates, plus the splice joint used to ship large units in sections. Full CAD details on request.
Installation methods explained →Performance & Certifications
Impact & hurricane certification
Designed for high-risk hurricane zones such as the south-eastern coasts and the islands, the impact line uses multi-layered laminated and tempered glass in reinforced frames, and is tested to Miami-Dade County NOA standards for impact resistance, water tightness and air infiltration.
Testing follows the Florida Building Code, 8th edition (2023). All units undergo TAS 201 (impact), TAS 202 (structural) and TAS 203 (cyclic pressure), and are rated for Zone 4, missile level D at 50 ft/sec — the large-missile requirement for a High Velocity Hurricane Zone.
Approval numbers available on request — contact us for the current NOA documentation for your configuration and size.
This satisfies testing requirements in parts of Florida. It is not the same as holding a Notice of Acceptance: the line does not carry a Miami-Dade NOA number at present. Approval is granted jurisdiction by jurisdiction — tell us the project address and we will confirm in writing what applies there before you specify it.
| Florida Product Approval | Available upon request — contact us for your jurisdiction |
| Miami-Dade County NOA | Available upon request — contact us for your jurisdiction |
| Texas Dept. of Insurance (TDI) | Available upon request — contact us for your jurisdiction |
Values not listed are pending the manufacturer’s certified test report and are deliberately left blank rather than estimated.
Warranty
Our products are certified to:
Certificate numbers available on request.
VERIFIABLE NOWCPD DRN-M-8 · DRN-M-11 · DRN-M-15 · DRN-M-19 · DRN-M-21Search any of these at nfrc.org and you will read the same figures we publish.
Options
Finishes
Powder-coat finishes to the standard RAL card, plus anodized options. Wood interiors are available in several species and interior finishes.
Glazing
- Double- or triple-pane insulated glass
- Low-E1 / Low-E2 / Low-E3 coatings
- Argon fill
- Tempered and laminated build-ups
- Custom interlayer colours and patterns
Bay and bow assemblies
Both are built from the units on this page rather than being separate products, so the finish, glazing and hardware you specify here carry straight through into the assembly.
Units set at an angle to project out from the wall, which turns a flat elevation into a seat, a deeper sill or a reading corner. Built from 3 to 6 casement or tilt-turn units, each of which can be fixed or operating — so you can put opening lights only where you need ventilation.
Four or more units connected in a gentle outward curve rather than faceted angles. Reads softer than a bay and pulls light in from a wider arc. Available with casement, tilt-turn or picture windows.
Size and performance figures on this page are for the individual units. The structural limits of a specific assembly — how wide, how many lights, what header is needed above it — are confirmed by the factory against your opening, and we get that in writing before it is quoted.
Exterior finish
Finish options for this platform are confirmed at quotation. We have not published a colour chart for it because we do not hold documented availability, and a chart that turns out to be wrong at order stage is worse than a question.
Lead Time
- Standard configurations, such as a 70-series double-glazed unit: 18 days in the factory from order. This is production time and does not include shipping.
- Special configurations: 3–5 weeks in production, also from order.
- Ocean freight: about 35 days to the U.S. West Coast, about 45 days to the East Coast.
- Schedules are confirmed in writing at order. We build to your project timeline.
Downloads
Drawings & documentation
CAD window and door schedules, BIM models, performance documentation and installation details are prepared per project for trade accounts.
Request documentation →From our projects
Read all reviews →Customer statements from installed projects, quoted unedited.
“The windows look fantastic and everyone is very happy… The finishing and workmanship is very good”
