A sliding invisible grille is a custom-fitted safety grille that glides on a track alongside a sliding window or balcony door, so the window keeps its full opening width 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 sliding window.
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 |
Why sliding windows need a specific fitting
Sliding windows and balcony doors run on a track — the grille has to be fitted to glide alongside that track without narrowing the usable opening
Very common on condo balcony access points and HDB service yards
Poor track alignment is the most common installation issue with sliding grilles specifically — needs accurate measurement of your existing track
How it works
Arrange for a site visit — we measure your sliding window or balcony door track
Custom sliding frame fitted to run alongside your existing track
Test glide and lock function together with our installer
Where this is most requested
Condo balcony sliding doors (very common request from condo owners)
HDB service yard and kitchen sliding windows
Landed property sliding doors leading to gardens or patios
No — it’s designed to run alongside your existing track without reducing the usable opening width.
Yes, this is one of the most common uses for sliding invisible grilles, especially in condos.
“Openable” is the general pricing category covering swing casement, sliding, and bifold types. Sliding specifically glides horizontally along a track, rather than hinging open like casement or bifold types.
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.
Sliding 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.