Types of Aluminium Windows (as per IS:1948 & IS:1949)

 

1. Types of Aluminium Windows (as per IS:1948 & IS:1949)

Common Types:

1. Sliding Windows – Horizontally movable sashes on rollers.
2. Casement Windows – Side-hinged, open inwards/outwards.
3. Fixed Windows – Non-opening, for light/view only.
4. Top Hung Windows – Hinged at the top, open outwards.
5. Tilt & Turn Windows – Dual function (tilt inwards for ventilation, swing open for cleaning).
6. Louvered Windows – Glass/aluminium louvers for adjustable ventilation.
7. Combination Windows – Fixed + Sliding/Casement mix.

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2. Standard Size & Thickness

(Sizes may vary based on manufacturer & site requirements; IS provides minimums)

3. Glass Details (as per IS:2553 Part 1)

• Common Glass Thickness: 4 mm, 5 mm, 6 mm (float or toughened glass).
• Safety Glass: Laminated or tempered glass for high-rise/critical areas.
• Double Glazed Unit (DGUs): 4–12–4 mm (for insulation & noise reduction).
• Glass Size:
  • Calculated based on clear opening inside the frame minus gasket allowance (generally 6–8 mm clearance).

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4. Locking System Details

• Sliding Windows: Espagnolette locks, crescent locks, latch locks.
• Casement Windows: Multi-point locking handles, friction stays.
• Fixed Panels: No locks (secured in frame).
• Keyed Locks: For security in residential/commercial use.

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5. Powder Coating

(as per IS:13871 – Powder Coatings for Aluminium)

• Types:
  1. Polyester Powder Coating – UV & weather resistant (most common).
  2. Epoxy Powder Coating – Better adhesion, interior use.
  3. Hybrid Powder Coating – Polyester + Epoxy mix.
• Thickness: Minimum 50–60 microns for exterior use.
• Colours: RAL shade chart available (white, black, silver, bronze, wood finish).

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6. Mosquito Net Details

• Types:
  1. Sliding mosquito mesh.
  2. Roll-up insect screen.
  3. Hinged mosquito screen.
• Frame Material: Aluminium 1.0–1.2 mm thick.
• Net Material: Fiberglass mesh, stainless steel mesh.

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7. Aluminium Window Components (Example: Sliding Window)

1. Main frame (outer frame).
2. Shutter frame (sash).
3. Glass panels.
4. Gaskets (EPDM rubber).
5. Interlock sections.
6. Rollers/wheel assembly.
7. Locking system (handle/espagnolette).
8. Powder-coated/aluminium frame sections.
9. Mosquito mesh panel (optional).
10. Beadings (snap fit/glass holding).
11. End caps & corner cleats.
12. Drainage caps.

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8. Purpose of Interlock

• Definition: The vertical meeting profile between two sliding sashes.
• Purpose:
  • Improves wind load resistance.
  • Prevents water leakage.
  • Enhances security.
  • Reduces rattling & improves sealing.
  • Supports multi-point locking.

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9. Key Points – Installation SOP for Aluminium Windows

1. Check Opening Size: Opening should be square & plumb as per approved drawing.
2. Frame Fixing: Fix main frame with stainless steel screws/anchor fasteners.
3. Plumb & Level Check: Ensure proper alignment before final tightening.
4. Sealant Application: Apply weatherproof silicone sealant around periphery.
5. Shutter Installation: Insert glass with gaskets, fix rollers & locks.
6. Interlock Fixing: Align interlock profiles properly for smooth closing.
7. Mosquito Mesh: Install as per design, ensuring smooth sliding.
8. Powder Coating Check: Ensure uniform finish & no scratches.
9. Functional Testing: Check sliding, locking, water tightness, and mosquito net operation.
10. Cleaning & Handover: Clean frame & glass, hand over with maintenance guidelines.