What Is a Casement Window? Everything You Need to Know Before Installing One in Singapore

When it comes to choosing windows for your HDB flat, condominium, or landed home, casement windows are one of the most popular and practical options. But what exactly is a casement window, and why is it so widely used in Singapore homes? In this guide, we break down everything you need to know — from how it works to design options, HDB regulations, and maintenance tips.

What Is a Casement Window?

A casement window is a window that’s attached to its frame by side hinges and opens outward or inward like a door. That’s why many homeowners casually refer to it as a swing window or hinged window — but the technical term is casement window.

Casement windows are commonly used in bedrooms, kitchens, and living rooms because they allow excellent ventilation and unobstructed views.

How Does Casement Windows Work?

Casement windows swing open on friction stays — stainless steel mechanical arms that hold the window open at various angles. They provide:

• Strong wind resistance

• Controlled opening angles

• Quiet and stable operation

Friction stays must comply with HDB regulations, which typically require stainless steel of at least Grade 304 and minimum 2.5 mm thickness.

Why Are Casement Windows Popular in Singapore?

✅ Excellent Ventilation – The wide opening allows fresh air to flow in, making them ideal for Singapore’s humid climate.

✅ Space-Saving – Unlike sliding windows, casement windows don't require overlapping frames.

✅ Good Sealing – When closed, the sash presses tightly against the frame, providing good insulation from sound and weather.

✅ Customisable Design – Choose from 2-panel, 4-panel, or mixed designs with fixed/picture windows or top-hung panels.

Common Configurations of Casement Windows

• Standard Side-Hinged Casement Windows – Most commonly used in bedrooms and living rooms.

• Top Hung + Casement Combo – Adds a top-hung panel above the main window for rainproof ventilation.

• Casement with Fixed Panel (Bay Windows) – Ideal for condos and landed homes with extended ledges.

• Picture Window with Side Casements – Combines fixed glass for view and side panels for airflow.

• Semi-Circle or Lattice Designs – Adds aesthetic character to bathrooms or classic interiors.

HDB Guidelines to Note for Casement Windows

For HDB flats, casement windows must comply with these key rules:

• Max width per panel: 700 mm

• Use of approved friction stays

• Permit required for window replacement

• Installation must be done by an HDB-licensed contractor

Ho Ho is fully HDB-licensed, with over 49 years of experience. We’ll apply for your permit, handle measurements, and ensure the installation meets all safety standards.

What Materials and Colours Are Available For Casement Windows?

Our aluminium-framed casement windows come in several powder-coated colour options:

• White

• Black

• Grey

• Bronze brown

Glass options include clear, tinted or frosted glass.

Casement Windows Maintenance Tips

• Clean glass and frames regularly

• Lubricate hinges with WD-40 every 6–12 months

• Avoid slamming windows against strong wind

• Check rubber seals for wear and replace if needed

Casement Window Installation & Lead Time

Once your order is confirmed, Ho Ho will:

1. Conduct an on-site measurement after order is confirmed

2. Apply for the HDB permit (if needed)

3. Fabricate and install your custom casement window

🕒 Lead time: 2–3 weeks🛠️ Installation time: ~1.5 hours per set of windows

Get a Quote For Casement Windows Today

To receive an accurate quote, send us:

• A photo of your existing window

• Window dimensions

• Preferred colour and glass type

• Floorplan (if available)

Or visit our showroom at 194 Pandan Loop #07-07 Singapore 128383 to explore our designs in person.

Click here to find out more about our casement windows today!