What Size Aluminium Sliding Door Do I Need? (2026 Guide)
What Size Aluminium Sliding Door Do I Need? (2026 Sizing Guide)
The size of the aluminium sliding door you need depends on three factors: your structural opening dimensions, your desired panel configuration (2, 3, or 4 panels), and the maximum span limits of the aluminium profile.
Quick Summary: Standard Sizes & Rules
- Standard single-panel width: 900–1,800 mm | Height: 2,100–2,400 mm
- Standard double-panel width: 1,800–3,600 mm | Height: 2,100–2,400 mm
- Maximum span per sash: 3,000 mm (for 6063-T6 aluminium without structural reinforcement)
- Golden measurement rule: Always measure the structural opening at three points for both width and height. Use the smallest measurement as your order dimension—never the largest.
Standard Aluminium Sliding Door Size Ranges
Standard production sliding doors come in defined size ranges that most manufacturers can build without custom tooling. Knowing these ranges helps you determine whether your opening fits standard production (faster, more cost-effective) or requires a custom quotation.
Single-Panel Sliding Doors
- Width: 900–1,800 mm
- Height: 2,100–2,400 mm
- Typical use: Internal doors, en-suite bathrooms, utility rooms, narrow terraces.
Two-Panel Sliding Doors (Standard Configurations)
|
Configuration
|
Overall Width
|
Overall Height
|
|---|---|---|
|
Equal panels (2S)
|
1,800–3,600 mm
|
2,100–2,400 mm
|
|
Fixed + sliding (1F1S)
|
1,800–3,000 mm
|
2,100–2,400 mm
|
|
Asymmetric (e.g., 2/3 + 1/3)
|
2,100–3,300 mm
|
2,100–2,400 mm
|
Three-Panel & Four-Panel Configurations
- Three-panel width: 2,700–4,500 mm (Ideal for wide living room extensions or garden rooms).
- Four-panel (or more): Available up to 6,000 mm wide in standard Starveil production, with panels stackable to one side or distributed across the opening.
Custom Sizes: When Standard Ranges Are Not Enough
Standard sizes cover about 80% of residential openings. If your structural opening falls outside these ranges—or if you want larger glass panes without mullion interruption—custom sizing is the answer.
When to Choose Custom Sizing
- Openings wider than 3,600 mm (double-panel standard max) where you want to avoid a central mullion.
- Non-standard wall thickness: Most standards assume 100–250 mm wall depth; anything outside this needs a custom track system.
- Openings with limited tolerances: Older properties with settling walls may have openings out of square by 10–25 mm.
Custom Size Trade-offs
Custom aluminium sliding doors typically add 20–40% to the per-sqm price and require 4–8 weeks of additional lead time. However, the architectural benefit is significant: a 4,200 mm sliding door without a central mullion delivers a glass viewing area 200–300 mm wider than the same opening with a structural bar.
Starveil engineering note: Starveil produces aluminium sliding doors in any custom dimension from 600 mm wide × 900 mm tall (small utility panel) up to 3,000 mm wide × 2,700 mm tall per sash. Custom sizes above 3,000 mm per sash require structural engineering review, which we provide as part of our standard quotation process.
How to Measure Your Opening Correctly
Measuring a structural opening sounds straightforward, but it is the step where most ordering errors occur. Follow this exact sequence:
Step 1: Measure Width in Three Places
Measure the horizontal opening at the top, middle, and bottom. Record all three. The smallest measurement is your order width.
Step 2: Measure Height in Three Places
Measure the vertical opening at the left, centre, and right. Record all three. The smallest measurement is your order height.
Step 3: Measure Wall Depth
Measure the wall thickness at the opening. This determines the track system depth and whether a flush track (low threshold) is feasible.
Step 4: Check for Out-of-Square
Measure both diagonals of the opening. If the diagonal difference exceeds 10 mm, the opening is out of square. Note this on your order—it affects how the frame is manufactured and whether packers or adjustable anchors are needed.
Step 5: Check Site Access
Before ordering panels wider than 1,500 mm or taller than 2,400 mm, measure every doorway, corridor, and stairwell the panels must pass through during installation. A 3,000 × 2,400 mm panel cannot always fit through a standard 900 mm interior door.
Maximum Aperture Limits for Aluminium Sliding Doors
Most sizing guides skip structural engineering limits. Here are the maximums for 6063-T6 aluminium sliding door systems:
|
Panel Configuration
|
Max Single Panel Width
|
Max Overall Width
|
Max Height
|
|---|---|---|---|
|
Single panel
|
3,000 mm
|
3,000 mm
|
2,700 mm
|
|
Double panel (equal)
|
3,000 mm per panel
|
6,000 mm
|
2,700 mm
|
|
Triple panel
|
3,000 mm per panel
|
9,000 mm
|
2,700 mm
|
|
Four-panel
|
3,000 mm per panel
|
12,000 mm
|
2,700 mm
|
⚠️ Critical structural note: The 3,000 mm per-sash limit is governed by deflection under wind load. Above 3,000 mm without a structural support bar, sash deflection under 50 kg/m² wind pressure exceeds the EN 12207 Class 4 air infiltration limit. Always specify a structural mullion or support bar above 3,000 mm per sash.
For coastal or high-wind applications, the maximum unassisted span may be reduced to 2,500 mm. Confirm with a Starveil engineer for your specific wind load zone.
Regional Sizing Conventions
- United States (Imperial): Standard rough openings are typically 60–72 inches wide × 80 inches tall (1,524–1,829 × 2,032 mm) for 2-panel, and 108 × 80 inches for 3-panel.
- United Kingdom / Europe (Metric): Standard 2-panel openings are 1,800–2,400 mm wide × 2,100–2,400 mm tall. Metric production allows finer increments (e.g., 2,100 mm, 2,250 mm). PAS 24 security applies to ground floors.
- Australia / New Zealand: Aligns closely with UK metric standards (1,800–2,400 mm wide × 2,100–2,340 mm tall). AS 2047 governs water penetration and air infiltration.
Before You Order: Measurement Checklist
- Width measured at top, middle, bottom (smallest dimension used)
- Height measured at left, centre, right (smallest dimension used)
- Wall depth measured at the opening
- Both diagonals measured (difference under 10 mm confirmed)
- Site access confirmed for panel dimensions (account for packaging)
- Opening squareness is within tolerance
- Floor level checked (uneven floors may require threshold adjustment)
- Structural lintel condition checked (is the opening structurally sound?)
- Clearance for track system and insect screen confirmed
Why Choose Starveil for Custom Sizing?
Starveil manufactures custom aluminium sliding doors from 600 mm to 6,000 mm wide per configuration. Every custom order includes:
- CAD drawing review within 48 hours
- A qualified engineer confirming structural requirements for apertures above 3,000 mm
- 240+ RAL powder coat colours and dual-colour options
- DDP shipping to port worldwide
Share your rough opening dimensions—including your three-point measurements—and a Starveil engineer will confirm the correct specification and panel configuration for your project.
Frequently Asked Questions (FAQ)
What are the most common aluminium sliding door sizes?
The most common sizes are 1,800 × 2,100 mm and 2,400 × 2,100 mm (2-panel). These dimensions fit standard residential rough openings across US, UK, EU, and AU markets.
How wide can an aluminium sliding door be without a support bar?
A standard 6063-T6 aluminium sash can span up to 3,000 mm without a structural support bar. Above 3,000 mm, a structural mullion or support bar is required by building engineering standards to prevent deflection.
Can aluminium sliding doors be made to exact measurements?
Yes. Starveil produces aluminium sliding doors to exact custom dimensions, not just standard size increments. Custom sizes typically add 20–40% to the per-sqm cost and require 4–8 weeks of additional lead time.
What is the standard height for aluminium sliding doors?
Standard heights range from 2,100 mm to 2,400 mm across most global markets. Starveil custom production can accommodate heights from 900 mm up to 2,700 mm.
How much gap do you need around a sliding door frame?
Allow 5–10 mm of clearance on each side and the top for thermal expansion accommodation and installation tolerance. The bottom gap should be minimal (3–5 mm) for effective weather-sealing.
What is the rough opening for a 1,800 mm sliding door?
For a nominal 1,800 × 2,100 mm sliding door, the rough opening should be approximately 1,830 mm wide × 2,130 mm tall (allowing 15 mm per side for installation). Always confirm with your specific manufacturer.
Ready to Get Your Project Started?
Get A Free Quote
