Understanding HDB Sliding Window Regulations: What Every Homeowner Should Know
- yshmichelle
- Nov 14
- 3 min read
If you live in an HDB flat, you probably already know that installing or replacing windows isn’t as simple as calling any contractor. All HDB sliding window works must follow strict safety regulations — and for good reason. Improperly installed or poorly maintained windows can fall, causing serious injury or damage to property below.
This guide explains the key HDB sliding window regulations, why they exist, and what homeowners should do to keep their homes safe and compliant.
Why Does HDB Regulate Sliding Windows?
Over the years, there have been several incidents in Singapore involving windows falling from high-rise flats. To protect public safety, HDB introduced clear regulations requiring all installations and replacements to be handled by HDB-licensed contractors only.
These rules ensure every HDB sliding window is installed with the correct materials, fittings, and safety mechanisms to prevent accidents.
Key HDB Regulations for Sliding Windows
When replacing or installing a sliding window in HDB flats, homeowners must ensure the following requirements are met:
1. Safety Devices Must Be Installed On HDB Sliding Window
Every aluminium sliding window must include these mandatory safety features:
Two self-locking safety stoppers per panel to prevent the panels from sliding out.
Synthetic resin stoppers at the top of the outer frame — at least two per panel width.
An aluminium bottom outer frame with a fixed angle strip facing outward for extra stability.
All parts must be secured using stainless steel grade 304 screws or rivets (minimum 4 mm diameter) to prevent corrosion.
These small components play a big role — missing or damaged parts can make your window unsafe.
For more HDB sliding window work requirement, please refer to HDB website.
2. Size Limitation of HDB Sliding Window Panels
Each sliding window panel must not exceed 1.2 metres in width. This ensures that the rollers can safely support the weight of the sliding window panel.
Why Homeowners Need to Check Their Existing Sliding Windows
Older HDB sliding windows installed before 2009 may not have the required safety stoppers or aluminium angle strips. These are considered unsafe under current rules and must be retrofitted by an HDB-licensed contractor.
Failure to comply can result in penalties, and homeowners cannot sell their flat if their windows are non-compliant.
Who Can Replace or Repair HDB Sliding Windows?
Only a BCA-registered and HDB-licensed window contractor can install, replace, or repair windows in HDB flats. Hiring an unlicensed installer can lead to:
Non-compliance with HDB regulations
Resale delays or rejection
Safety hazards to occupants and the public
Ho Ho is both HDB-licensed and BCA-registered, ensuring that every HDB sliding window we fabricate and install meets the latest safety standards.
Window Maintenance & Safety Responsibilities (HDB Flats)
Windows in your flat are subject to constant use and exposure to rain and wind. Over time, parts deteriorate due to wear and tear. To stay compliant and safe, you must maintain your HDB sliding window regularly — neglected windows can fall and cause serious injury to passers-by.
Every 6 months, check that:
Panels slide smoothly on the track.
No screws, rollers, or seals are loose or worn.
Safety stoppers and angle strips are intact.
There are no cracks, corrosion, or gaps around the frame.
If your window looks unsafe:
Take precautionary measures to secure it.
Engage a BCA-approved, HDB-listed window contractor to repair or replace it promptly.
If a window falls due to poor maintenance, homeowners may face a fine of up to $10,000 and/or up to 1 year’s jail. For more information, please refer to HDB website.
Recommended Sliding Window Safety Checks By BCA & HDB
HDB and BCA advise all homeowners to Check, Clean, and Change your windows twice a year — on 6 June (6/6) and 12 December (12/12).
Check that the safety stopper and angle strip are secure.
Clean the track so that window panels slide smoothly.
Change any worn-out safety parts immediately by engaging an HDB-licensed and BCA-approved window contractor.
Following this schedule helps keep your HDB sliding windows in safe working condition all year round.
Final Thoughts On HDB Sliding Window Regulation
HDB’s sliding window regulations are there to protect lives, not to inconvenience homeowners. Regular maintenance and professional installation help keep your family safe and your property compliant.
If your HDB sliding windows are due for inspection or replacement, contact Ho Ho — Singapore’s trusted HDB-licensed window contractor since 1976.
📍 Showroom: 194 Pandan Loop #07-07 Singapore 128383
📞 WhatsApp / Call: 96319288 or 67479019
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