Casement window invisible grilles in Singapore use specialised mounting brackets that allow full outward-opening operation while keeping your home safe. Endo Grilles custom-fits each installation to your casement window dimensions, ensuring smooth operation and a clean aesthetic. Prices start from $300 per casement window for HDB and condo homes.
A casement invisible grille is a custom-fitted safety grille built around a hinged (casement) window’s existing frame and hardware, so the window still opens and closes normally while stainless steel cables prevent falls. It’s part of Endo’s Openable Invisible Grille range — full pricing is on our Invisible Grilles Pricing Guide, starting from $400 for a standard HDB casement window.
Four reason to choose an openable grille for this window:
Access-required windows — a must for any window you need to physically go out through, such as reaching an aircon compressor for servicing, or accessing an outdoor laundry rack Pet-safe by design — the 1.5-inch gap between cables makes it difficult to reach and open the window handle, adding a layer of protection if you have cats or other pets that might otherwise nudge a window open Easier window cleaning — not essential, but a real convenience if you clean your windows often Required for insect mesh — if you’re planning to install insect mesh on this window, an openable grille is a must.
| Reason | Why It Matters | Compulsory? |
| Access-required windows | A must for any window you need to physically go out through — reaching an aircon compressor for servicing, or accessing an outdoor laundry rack | Yes |
| Pet-safe by design | The 1.5-inch gap between cables makes it difficult to reach and open the window handle, adding a layer of protection if you have cats or other pets that might otherwise nudge a window open | Yes |
| Easier window cleaning | Not essential, but a real convenience if you clean your windows often | No |
| Required for insect mesh | If you’re planning to install insect mesh on this window, an openable grille or grille with a frame is a must | Yes |
Why casement windows need a specific fitting
– Casement windows hinge outward or inward, unlike sliding windows which run on a track — the grille has to be custom-measured around your specific hinge type and swing direction
– Common in older HDB flats and many landed properties, where the original window hardware varies more than newer BTO units
– A generic or incorrectly-fitted grille can obstruct the window’s swing or fail to close fully — this is the most common installation mistake with casement windows specifically
How it works
1. Site visit — we assess your casement window’s hinge type, swing direction, and frame condition
2. Custom stainless steel cable frame fitted around your existing hardware
3. Function check together with our installer to confirm smooth open/close with the grille in place
Where this is most requested
- Older HDB flats with original casement windows (pre-2000s blocks)
- Landed property study rooms and bedrooms with hinged windows.
- Kitchen and service yard casement windows needing ventilation access
Where this is most requested
- Older HDB flats with original casement windows (pre-2000s blocks)
- Landed property study rooms and bedrooms with hinged windows
- Kitchen and service yard casement windows needing ventilation access
Yes, Endo’s invisible grilles are BCA registered and Setsco certified, approved for HDB installation.
No — the frame is custom-fitted around your existing hinge and hardware during the free site visit, so the window continues to open and close as normal.
Casement grilles fall under Endo’s Openable Invisible Grille pricing, from $400 for a standard HDB window. See our full [pricing guide] for size-based and apartment-type pricing.
Yes — casement windows are one of our most common jobs in older HDB blocks where hinge types vary from newer BTO units.
The 1.5-inch gap between cables makes it difficult to reach and open the window handle, which adds a layer of protection against pets nudging a window open. It’s not a lock replacement, but it does make accidental opening much harder.
Explore Our Invisible Grille Range
Have sliding windows instead? See our sliding window invisible grilles. Choose from All Weather Cables™, nylon-coated cables, or Swiss Diamond Rods for your casement windows. Cat owners can explore our cat-proof invisible grilles. View pricing details or request a free quote.
Related Guides
- The Complete Guide to Window Grilles in Singapore (2026)
- Invisible Grilles vs Mesh Grilles: Which Is Better?
Frequently Asked Questions About Casement Window Invisible Grilles
Can invisible grilles be installed on casement windows?
Yes. Endo Grilles uses specialised mounting brackets designed specifically for casement windows, allowing the grille to be installed without affecting the window’s outward-opening operation. The brackets are custom-fitted to each window’s dimensions.
Will invisible grilles block my casement window from opening fully?
No. The custom bracket system ensures your casement windows can open and close normally. The invisible grille cables are installed on the exterior side of the window frame, so they do not interfere with the window operation.
How much do casement window invisible grilles cost in Singapore?
Casement window invisible grille installation starts from $300 per window. The exact price depends on the window size and the number of casement panels. Endo Grilles provides free on-site measurement and quotation.
Are casement invisible grilles suitable for HDB flats?
Yes. Many newer HDB flats feature casement windows, and invisible grilles can be fitted to all standard HDB casement window sizes. Our installers are experienced with HDB regulations and window specifications.
Can I still clean my casement windows after installing invisible grilles?
Yes. The grille design allows you to open your casement windows outward for cleaning. For external cleaning, the cables are spaced wide enough to reach through with a cloth or squeegee.