When should you consider the ALPES C120? Consider this outward-opening aluminum window when your project can accommodate an exterior sash swing and needs a configurable window-and-screen arrangement. Before ordering, confirm opening clearances, frame installation details, glass construction and performance evidence for the proposed configuration. The model name and profile dimensions alone cannot establish suitability for a particular building.
For architects, builders and homeowners preparing a window schedule, the C120 aluminum casement window provides a concrete starting point: ALPES publishes its opening method, profile material, insulation strip and several frame and sash dimensions. The next step is to connect those details to the opening you actually intend to build.
What does the C120 product specification tell you?
The following details appear on the ALPES C120 product page, checked on September 19, 2026. Use them to identify the system under discussion, then request drawings and a written configuration for your order.
| Published field | C120 value | What to confirm for your project |
|---|---|---|
| Opening Method | Outward Opening | Hinge side, opening angle and the space occupied by the open sash. |
| Profile Thickness | 1.8–2.0 mm | Which profile sections and thicknesses apply to the quoted assembly. |
| Profile Grade | 6060-T66 | Material specification in the approved product documentation. |
| Insulation Strip | PA66GF25 | Thermal-break arrangement and performance data for the complete window. |
| Frame Wall Width | 119 mm | The section drawing showing how the frame meets the wall and finishes. |
| Glass Sash Thickness | 62 mm | The separate glass build-up; this field is not a glass-pane thickness specification. |
These are manufacturer-published specifications, not independent test results. Final sizes, glazing, hardware and installation details should be recorded in the approved order documents.
Check the outward swing before choosing the window layout
An outward-opening sash needs usable space beyond the wall. Mark its full movement on a plan and elevation, including the hinge side and maximum intended opening. Check nearby walls, balcony furniture, external shading, planting and routes people use.
For example, a window beside a terrace seating area may fit the wall opening while its open sash conflicts with a chair or walkway. Resolve that conflict in the layout review, before dimensions become an order. Also confirm how occupants will reach the handle, operate the screen and clean the exterior glass.
Label each opening consistently on the window schedule and drawing. If you specify left or right handing, state whether the view is from inside or outside; an unlabelled sketch can leave the supplier and installer working from different assumptions.
Specify glass and performance as separate decisions
A thermal break reduces heat transfer through an aluminum frame, but the glass also affects the window's overall thermal behavior. The Australian Government's Your Home guide to glazing and frame performance explains why both need to be considered. This general guidance does not establish a rating for C120.
Describe the room, orientation, shading and whether heating or cooling is the main concern. Ask ALPES to identify the proposed glass layers, cavity arrangement, coatings and any gas fill in writing. Treat privacy, daylight and appearance as requirements to discuss rather than assuming a single glass option meets every need.
The C120 page includes a Thermal K-Value entry, but it does not clearly identify its unit, specimen configuration or test conditions. Obtain that information before comparing it with another supplier's whole-window result. For air, water, wind or acoustic requirements, request the relevant report and check that its scope covers the proposed configuration.
Confirm screens, hardware and neighboring openings together
The C120 page lists a standard screen and optional mesh choices, and its hardware section identifies Roto components alongside an ALPES roller locking device. Ask which items are included in your quotation, which are optional and how they work with the selected sash size. A component description does not ｒｅｐｌａｃｅ confirmation of the supplied assembly.
Where the window sits beside a patio entrance, review the adjoining aluminum sliding doors in the same drawing package. ALPES lists several SL-series systems with different track arrangements and opening options. Coordinate frame alignment, finish samples, screen movement and clear passage; do not assume that selecting the same supplier makes every visible dimension identical.
If the room connects to a proposed glazed enclosure, include the roof outline, overall dimensions and ventilation needs in a custom sunroom design enquiry. ALPES currently presents this category as a project consultation without detailed systems listed. Confirm any proposed connection separately; the C120 product page does not establish compatibility with an unspecified sunroom structure.
What should you send for a useful C120 quotation?
Use one opening reference across your plans, photographs and enquiry. A practical request should include:
Project context: location, building use, floor level and exposure conditions.
Opening schedule: reference, quantity, width and height, with units and a clear distinction between rough-opening dimensions and proposed finished-frame dimensions.
Operation: hinge side, viewing direction, sash layout and nearby obstacles.
Glass and finish: daylight, privacy and thermal priorities, preferred color and any specified glass construction.
Evidence and details: project performance requirements, section drawings, proposed hardware and screen configuration.
Supply scope: delivery destination, required schedule, packaging, installation responsibilities and warranty terms to be confirmed in the quotation.
Before approving production, reconcile the quotation with the drawings. If a finish, glass option or hardware item changes, have that revision carried through the same set of documents.
Frequently asked questions
Does C120 identify the exact frame width?
Use the published dimension rather than deriving one from the model name. ALPES lists Frame Wall Width as 119 mm for C120. A section drawing is still needed to confirm the installation geometry.
Does a 62 mm Glass Sash Thickness mean 62 mm glass?
No. The website identifies that measurement as Glass Sash Thickness. Request a separate glazing specification showing the panes and cavities included in the quotation.
Is C120 suitable for every exposed or coastal opening?
Suitability cannot be determined from the model name alone. Review the site exposure, proposed dimensions, finish, hardware and applicable performance evidence with the project designer and ALPES before specifying the assembly.
Can C120 match a neighboring door or sunroom?
Discuss the elements together, but confirm colors, frame relationships and junction details individually. Matching appearance and technical compatibility require different checks.
Prepare your C120 project enquiry. Start with the opening schedule, a marked-up elevation and your glass and finish priorities. Send them to ALPES at lynne@alpesvip.com and request a written configuration with supporting drawings. That gives you a specific assembly to review before placing an order.
