An openable invisible grille is a custom-fitted safety grille built onto a swing, bifold, or casement-style hinged frame, so the window or balcony opening still opens fully while stainless steel cables prevent falls. It’s Endo’s general “Openable” pricing category, covering any grille that needs to move with the window rather than staying fixed — starting from $400 for a standard HDB window. Full size-based pricing is on our Invisible Grilles Pricing Guide.
Why Choose an Openable Grille for This Window
| 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 is a must | Yes |
Which Opening Mechanism Do You Need?
“Openable” covers three hinge and track types. We’ll confirm the right one for your window during the free site visit:
- Swing / casement — hinges outward or inward like a door; most common in older HDB flats and landed study rooms. See our casement window invisible grilles page.
- Sliding — tracks sideways alongside the window or balcony door without narrowing the opening. See our sliding window invisible grilles page.
- Bifold — folds flat in sections against the wall, best for wide balcony openings where a single swing panel has nowhere to swing to.
How It Works
- Site visit — we assess your window or balcony opening’s hinge type, swing direction, and frame condition
- Custom stainless steel cable frame fitted around your existing hardware
- Function check together with our installer to confirm smooth open/close with the grille in place
Where This Is Most Requested
- Balconies used for drying laundry, where you need to reach through the full opening
- Older HDB flats and landed properties with swing or casement windows
- Units where the window also serves as a secondary ventilation or escape route
- Homeowners who want grilles that don’t block window-cleaner or aircon servicing access
Frequently Asked Questions About Openable Invisible Grilles
Can an openable invisible grille still stop a child or pet from falling?
Yes — when closed and latched, the cable spacing and tension meet the same safety standard as our fixed grilles. The opening mechanism only matters when you deliberately open it; it doesn’t reduce safety while closed.
Is an openable grille more expensive than a fixed one?
Yes, typically — the swing, bifold, or sliding hardware adds cost over a simple fixed frame. Openable grilles start from $400, against $300 for a comparable fixed grille. See our pricing guide for exact size-based figures.
Does HDB allow openable invisible grilles?
Standard internal openable grilles mounted behind your existing window generally don’t require a separate HDB renovation permit. Grilles facing common corridors or service yards need to follow approved facade guidelines — we’ll confirm this for your specific unit during the free site visit.
How long does installation take?
Most single-window installs are completed within 1 to 2 hours. Full-unit jobs with multiple windows and a balcony are usually done within a day.
What’s the difference between swing, bifold, and sliding openable grilles?
Swing opens on a hinge like a door; bifold folds flat in sections, good for wide openings; sliding tracks sideways alongside the window or door. We’ll recommend the right mechanism based on your dimensions during the quote.
Explore Our Invisible Grille Range
Have sliding windows instead? See our sliding window invisible grilles. Have casement windows? See our casement window invisible grilles. Choose from All Weather Cables™, nylon-coated cables, or Swiss Diamond Rods. Cat owners can explore our cat-proof invisible grilles. View pricing details or request a free quote.