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Invisible Grille vs Window Grille vs Cat Net for HDB Flats
How invisible grilles, aluminium window grilles and cat nets compare for HDB window safety, what each costs, and which suits young children, cats or a clear view.
- Invisible grilles keep the view and suit young children; cats can squeeze through the cables.
- Invisible grilles are about $440 to $570 per panel; cat mesh about $120 to $200 per window.
- Many families combine an invisible grille with cat mesh on the windows cats use.
Homey Furnishing 2 min read HDB owners usually choose between three window safety options: invisible grilles, traditional aluminium window grilles and cat nets or mesh. Invisible grilles keep the view open and suit families with young children. Cat nets and mesh stop cats squeezing through gaps that a grille leaves. Aluminium grilles are sturdy but block more of the view.
Quick comparison
| Invisible grille | Aluminium window grille | Cat net or mesh | |
|---|---|---|---|
| What it is | Thin steel cables fixed across the window | Fixed metal bars or panels | Fine net or mesh panel over the window |
| View | Almost unobstructed | Partly blocked | Slightly reduced |
| Children | Good; cable spacing stops falls | Good | Not designed for child safety |
| Cats | Cats can squeeze between cables | Small gaps can still let cats through | Best; no gaps |
| Typical 2026 price | About $440 to $570 per panel; whole flats about $440 to $3,000 | Cat-proof aluminium grilles from about $12 to $14 per sq ft | About $120 to $200 per window for fixed or removable mesh |
Which one should you choose?
- Young children: invisible grilles or aluminium grilles, which are designed to stop falls.
- Cats: cat mesh or nets, because cats can squeeze between grille cables and bars. Many cat owners combine an invisible grille with mesh on the windows cats use most.
- Mosquitoes too: a mosquito screen also keeps cats in if you choose pet-resistant mesh.
- Renters: removable mesh panels avoid drilling permanent fixings.
What to check before installing
- Windows must still open and close for cleaning and ventilation.
- Fixing points: grilles are anchored into the window frame or wall, so use an experienced installer.
- Do not alter the facade. Window replacement in HDB flats needs a permit and a BCA Approved Window Contractor. Grilles and nets should not change the window itself.
- HDB window safety: keep windows, handles and rivets in good condition and inspect them regularly, whatever you install.
Our cat nets and mesh
We install cat nets and pet-resistant mesh for HDB windows, gates and doors. Fixed or removable window mesh is about $120 to $200 per window, and roller or retractable mesh is about $200 to $350 per window. See pet proofing and our guide to cat-proofing an HDB flat.
FAQ
How much is an invisible grille in Singapore? About $440 to $570 per panel based on 2026 listings, with whole-flat installations ranging from about $440 to $3,000.
Are invisible grilles cat-proof? Not reliably. Cats can squeeze between the cables. Cat mesh or nets are better for cats.
Do I need HDB approval for an invisible grille? Grilles that do not replace or alter the window are generally treated differently from window works, but check with your installer and HDB for your block. Window replacement always needs a permit and a BCA Approved Window Contractor.
What is best for both kids and cats? Many families combine an invisible grille for fall protection with cat mesh on the windows the cat uses.
Sources: Pawrenthood cat-proofing guide (invisible grille prices), Singapore grille and cat mesh listings, HomeySG market rates, and HDB window works guidance, checked October 2026. Prices are indicative.