What Thickness Aluminum Window for Africa?

What Thickness Aluminum Window for Africa?

A fabricator sends a sample profile and says, "1.4 mm—very strong." Your engineer asks for "70 series thermal break." You're both talking about thickness, but not the same measurement. In African heat, coastal salt, and seasonal storms, picking the wrong "thick" window costs you in flexing sashes, whistling gaps, and callbacks—not just on the quote line.

Here's how to read wall thickness (mm), system depth (series), and glass thickness together—so you don't buy thin metal in a heavy-wind, high-sun job.

Two different "thickness" numbers (don't mix them up)

1. Profile wall thickness (mm)
This is how thick the aluminum walls of the extrusion are—measured in millimetres (e.g. 1.4 mm, 1.6 mm, 2.0 mm). It affects stiffness, wind resistance, and durability when the profile is well designed.

2. Frame system depth / "series" (mm)
This is the overall depth of the frame package—often called 50, 55, 60, or 70 series (roughly 50–70 mm deep). Thermal-break windows use depth for insulation cavity and glass pocket, not just "more metal."

3. Glass thickness (mm)
Separate again: 4 mm, 5 mm, 6 mm panes, laminated layers, and air gaps. In African sun, glass and shading often matter more for room comfort than an extra 0.2 mm on a non-critical bar.

What this means for you: Ask suppliers for written wall thickness on main frame and sash, series depth, and glass makeup—not "thick aluminum" on a flyer.

What wall thickness is typical for aluminum windows?

There is no one African standard thickness—countries and projects differ. These common market bands help you compare quotes (verify with a micrometer or mill certificate on serious jobs):

Regional note: In much of Anglophone Africa you'll see aluminium on specs; the measurements are the same.

Important: A honest 1.6 mm well-braced profile can outperform a claimed 2.0 mm hollow section with poor design. Thickness is one input; section shape, alloy grade, and corner construction matter too.

How much thickness do you need for African conditions?

Think in scenarios, not slogans.

Intense sun and heat (inland, Sahel, many cities)

• Wall thickness: 1.4–1.6 mm on standard house windows is widely used; upgrade sash and mullions if openings are wide.

• System: Prefer thermal-break series (often 55–70 mm depth) for AC-cooled rooms—not because raw aluminum "needs" 2.0 mm walls, but because the break + double glazing limits heat gain.

• Glass: Double glazing with appropriate tint or solar control on sun-facing elevations; single 4 mm glass is a comfort risk, not a thickness fix.

Coastal humidity and salt (Lagos, Dar es Salaam, Cape Town coast, etc.)

• Wall thickness: 1.4–1.6 mm minimum on exposed frames; 1.6–2.0 mm on large sliders and doors that take wind load.

• Finish beats brute thickness: Quality powder coat or specified anodizing, stainless or coated hardware, and drained tracks matter more than chasing 2.0 mm on every small bar.

• Glass: Consider laminated outer panes where impact or safety matters; thickness follows wind and opening size.

High wind, cyclone exposure, or tall buildings

• Wall thickness: Treat 1.6 mm as a floor for main frame on many residential jobs; 1.8–2.0 mm on large spans, mullions, and sliding door stiles is common engineering practice.

• Design load: Ask for wind pressure / size limits per opening—thickness alone doesn't certify performance.

• Installation: Anchoring and reinforcement often decide failure before the extrusion wall does.

Burglar-resistant or ground-floor openings

• Thicker 1.6–2.0 mm profiles and laminated or toughened glass combinations are typical; grilles and lock hardware are part of the system.

Profile wall thickness vs system depth (quick comparison)

What this means for you: For "Africa," most buyers need 1.4–1.6 mm baseline on standard windows, stepping up on large sliders and coastal/wind-heavy jobs, plus thermal break and glass where the room is cooled or sun-struck.

Frame vs glass vs hardware vs installation

Myth vs fact

Myth: "Thicker aluminum always means cooler rooms in African heat."
Fact: Room temperature is driven mainly by glass solar gain, air leakage, and shading. A 2.0 mm non-thermal frame with single glass can still overheat an AC room. Thermal break + double glazing beats raw wall thickness for heat.

Myth: "1.2 mm is fine everywhere if the price is right."
Fact: 1.2 mm may survive a small bathroom vent but is a weak default for large sliders, coastal wind, or tall glass. Match thickness to opening size and load, not only to budget.

Buying guide: what to write on your spec sheet

What I'd verify before payment: sample profile, written wall thickness for frame and sash, corner join method (mechanical vs welded), glass makeup, and whether "series" depth is thermal break.

FAQ

What is the best aluminum thickness for windows in Africa?
For typical homes, 1.4–1.6 mm on main frame and sash is a common baseline; 1.6–2.0 mm on large sliders, doors, and mullions is wise. Add thermal break and double glazing for hot, AC-cooled spaces—thickness alone isn't "best."

Is 1.2 mm aluminum profile too thin?
For small, lightly loaded fixed windows it may appear on budget jobs. For main living areas, large openings, or windy/coastal sites, 1.2 mm is usually underspecified—push toward 1.4–1.6 mm minimum on load-bearing members.

Is 2.0 mm always better than 1.4 mm?
Not always. Section design and glass weight matter. 2.0 mm on key members helps large, heavy units; over-specifying every minor bead adds cost without comfort gains.

Does 70 series mean 70 mm thick walls?
No. 70 series usually means roughly 70 mm frame depth (thermal-break system size), not 70 mm aluminum walls. Wall thickness is still typically ~1.4–2.0 mm.

What glass thickness for aluminum windows in hot climates?
Many units use 4–6 mm per pane in double glazing (e.g. 5+12A+5 or 6+12A+6), with laminated outers where safety or noise matters. Follow the profile manufacturer's glass chart for max size.

How do I check thickness on site?
Ask for mill certificates or measure with a micrometer on an agreed sample before bulk production. Labels like "1.4" should match measured wall, not just paint.

Bottom line

For Africa, start with fit-for-purpose wall thickness—usually about 1.4–1.6 mm on standard residential frame and sash, higher on big openings and windy or coastal work—and pair it with the right system depth (thermal break where you cool rooms), glass, and installation. "Thick aluminum" without glass and finish spec still fails in heat and rain.

Pre-purchase checklist

1. Get frame, sash, and mullion wall thickness in mm in writing.

2. Match glass makeup and max sizes to the profile chart.

3. Upgrade hardware and coating for coast and security—not only metal walls.

Send opening sizes and your city (coastal vs inland, floor level); a serious supplier will point to a series + mm combo instead of a one-word "thick" promise.