HDB Windows in Singapore

Q: Can you change or replace your HDB windows?

Yes, but the work must be done by a BCA-approved window contractor listed in HDB's directory, and a renovation permit is required. Standard casement and sliding windows can be replaced, but the replacement of full-height windows, including 3/4-height and bay windows, is strictly not allowed by HDB. Your approved contractor advises on what applies to your block.

Q: Do I need HDB approval to replace my windows?

Yes. HDB requires a renovation permit for all window replacement work, and it must be carried out by a BCA-approved window contractor. As a licensed contractor, 9 Power submits the permit and certifies the completed works to BCA within the required timeframe.

Q: How long do fabrication and installation take?

After your site measurement, fabrication typically takes about 1 to 2 weeks depending on the finish and glass selected. Installation for a standard flat is usually completed within a day.

Q: What finishes and colours are available?

Powder-coated silver, white and black are standard, with wood-grain and custom RAL colours available on request. Powder coating is durable and colour-stable in Singapore's climate.

Q: What does the 10-year warranty cover?

Our 10-year warranty covers the structural integrity of the aluminium frame and the workmanship of the installation. Hardware and accessories are covered under separate manufacturer terms.

Q: What are the main types of HDB windows?

The most common HDB windows are casement (side-hinged, swings outward), sliding (panels slide on a track), top-hung (tilts outward from the top) and fixed or picture windows (a sealed pane for light and view). Casement and sliding aluminium windows are the standard in most HDB flats today.

Q: Why are aluminium windows best for HDB flats?

Aluminium does not rust, rot or warp in Singapore's heat and humidity, and its strength allows slim frames that let in more light and view than bulkier materials. 9 Power uses architectural-grade 6063-T5 aluminium with powder-coated finishes that stay colour-stable in the local climate.

Q: How to clean HDB windows safely?

Clean windows from inside the flat wherever possible, never lean out or sit on the ledge, and don't over-reach. Wipe the glass and aluminium frames with a soft cloth and mild detergent, and check that hinges, rivets and stoppers are secure while you clean. If rivets look corroded or the window is stiff, stop using it and arrange a professional inspection.

Types, Replacement & Design

HDB Windows IN SINGAPORE

HDB windows do more than let in light — in a high-rise flat, they’re a safety feature, which is why they’re tightly regulated.

Every window 9 Power makes is custom-fabricated to your exact opening and installed by an HDB-licensed, BCA-approved team.

Categories: BTO, HDB

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Overview

Types of HDB Windows

Most HDB flats use one of four window types, and many homes mix them to suit each room:

Casement — hinged at the side and swings outward. The most common HDB window: it opens fully for maximum ventilation and is easy to clean from inside.
Sliding — panels slide horizontally on a track. Space-saving where an outward swing isn’t possible, so it’s ideal for balconies, service yards and corridor-facing openings.
Top-hung (awning) — hinged at the top and tilts outward. Lets you keep the window open during light rain while staying ventilated and secure.
Fixed / picture — a sealed pane that doesn’t open, used to maximise light and view or to fill in around other window types. It has the slimmest frame of all.

Older flats may also have louvre (ventilation) windows. One important limit: HDB does not allow the replacement of full-height windows, including 3/4-height and bay windows, so those stay as built even during a renovation.

At a Glance

Casement, sliding, top-hung & fixed
Clear, tinted, frosted or laminated glass
Optional insect / mesh screens
Free site measurement
10-year structural warranty

Window Types

CHOOSE YOUR OPENING

Casement

Hinged at the side and swings outward. The most common HDB window — opens fully for ventilation and easy cleaning.

Sliding

Panels slide horizontally on a track. Space-saving where an outward swing isn't possible — ideal for balconies and corridors.

Top-Hung

Hinged at the top and tilts outward. Lets you keep windows open during light rain while staying secure and ventilated.

Fixed / Picture

A sealed pane that doesn't open, used to maximise light and view or fill in around other window types. The slimmest frame option.

Overview

HDB Aluminium Windows: Why Aluminium Wins

Aluminium is the most practical window material for Singapore homes because it doesn’t rust, rot or warp in the heat and humidity, and its strength allows slim frames that let in more light. 9 Power fabricates in architectural-grade 6063-T5 aluminium alloy, with powder-coated finishes that resist fading and never need repainting. Compared with uPVC or timber, aluminium gives you a larger glass area, a cleaner look and genuinely low maintenance — usually just a wipe-down.

Can You Change Your HDB Windows?

Yes — but you must hire a BCA-approved window contractor to replace the window in an HDB, and get a renovation permit. This isn’t optional. Windows in a high-rise flat are a safety-critical element, so HDB and BCA require certified installers, mandatory grade 304 stainless-steel rivets, and a completion certificate submitted to BCA after the work.

In practice, that means you can replace standard casement and sliding windows, but not full-height, 3/4-height or bay windows. As an HDB-licensed contractor, 9 Power assesses your existing windows, submits the permit, installs to the required standard, and safely removes and disposes of your old units. HDB’s window works guidelines set out exactly what’s allowed.

Why These Windows

Why Choose 9 Power for Your HDB Windows

Weatherproof

Sealed frames and quality gaskets keep out monsoon rain and reduce draughts, with aluminium that won't corrode over time.

More Light, Slim Frames

Aluminium's strength allows thinner profiles than uPVC, so you get larger glass area, brighter rooms and a cleaner look.

Quieter Indoors

Laminated or double-glazed options cut traffic and neighbour noise — a real difference for flats facing busy roads.

Low Maintenance

A wipe-down is all it takes. Powder-coated finishes resist fading, and there's no repainting or rust-treating to keep up with.

HDB-Compliant

Installed by a licensed HDB contractor to the required standards, with safe removal and disposal of your old windows.

10-Year Warranty

Every installation is backed by a 10-year structural warranty on the frame and workmanship — not a token six months.

Design and Configuration

HDB Windows Design: Finishes, Glass and Configuration

A window replacement is also a chance to update the look of your flat. With 9 Power you choose:

Frame finish — powder-coated silver, white or black as standard, with wood-grain and custom RAL colours on request.
Glass — clear, tinted, frosted, laminated, or double-glazed (insulated) for quieter rooms.
Configuration — slim casement, sliding or top-hung profiles, mixed to suit each room, with the option to integrate grilles or insect screens.

For flats facing busy roads, laminated or double-glazed soundproof windows make a real difference to noise. Slim aluminium frames keep the glass area — and the view — as large as possible.

Solar Film for HDB Windows

You can add solar or tinted film to your existing HDB window glass to cut heat, glare and UV — and it generally needs no permit, provided the film is non-reflective or does not exceed 20% reflectance under HDB’s conditions. Highly reflective or mirror-like films can affect the building’s external appearance, so check them against the latest HDB guidance before installing.

Film is applied to the glass you already have, which makes it a quick, lower-cost upgrade for a hot, west-facing flat. If you’re replacing your windows anyway, the cleaner long-term option is to specify tinted or laminated glass at fabrication — the tint is built into the pane rather than added on top, so there’s nothing to peel or replace later. 9 Power can advise which route suits your flat, orientation and budget.

Specifications

TECHNICAL DETAILS

MATERIAL	Aluminium alloy 6063-T5, architectural grade
OPENING TYPES	Casement, sliding, top-hung, fixed / picture
FINISHES	Powder-coated silver, white, black; wood-grain and custom RAL on request
GLASS OPTIONS	Clear, tinted, frosted, laminated, or double-glazed (insulated)
SCREENS	Optional insect / mesh screens and grille integration
SIZING	Custom-fabricated to your exact opening — no fixed sizes
SUITABLE FOR	HDB flats, BTO units, condominiums, landed homes, commercial
COMPLIANCE	HDB-licensed contractor · BCA-approved · BizSafe certified
WARRANTY	10-year structural warranty on frame and workmanship

Questions

ALUMINIUM WINDOW FAQs

Are aluminium windows better than uPVC or timber for Singapore homes?

Aluminium handles Singapore's humidity, heavy rain and coastal salt air without warping, rotting or rusting. The frames are slim, strong and low-maintenance, which is why they are the most common choice for HDB flats, condominiums and landed homes here.

Can you change or replace your HDB windows?

Do I need HDB approval to replace my windows?

How long do fabrication and installation take?

What finishes and colours are available?

What does the 10-year warranty cover?

What are the main types of HDB windows?

Why are aluminium windows best for HDB flats?

Can I add solar film or tinted windows to my HDB flat?

Yes. Solar or window film can be applied to your existing HDB window glass to cut heat, glare and UV, and it generally does not need a permit as long as the film is non-reflective or does not exceed 20% reflectance, per HDB's conditions. Highly reflective or mirror-like films should be checked against the latest HDB guidance first. You can also specify tinted or laminated glass when new windows are fabricated.

How to clean HDB windows safely?