Privacy film for sidelights, bathrooms and street-facing rooms
A front bedroom a few steps from the footpath, glass either side of the front door, a bathroom pane on the street side. Privacy film on the room side of the glass stops people outside seeing in and lets the daylight through.
Glass that faces the footpath
We find these four on Federation and inter-war fronts across Ku-ring-gai, in the low-rise walk-ups on the narrow streets of Kirribilli and Lavender Bay, and in ground-floor units near Chatswood, Gordon and Hornsby stations.
Sidelights beside the front door
Narrow panes either side of the door that show the hall to anyone at the gate. Plain glass in a newer door takes frosted or patterned film well. Leaded sidelights are looked at in person, and film on them is never promised before then.
The front bedroom
Often a double-hung window on the street side and the only window in the room. Frosting the lower sash covers the bed and the desk and leaves the upper sash clear for the sky.
The bathroom pane
Most already have obscure glass. It hides a good deal by day, and less than people expect at night, up close or when the glass is wet. Film can add to it when the smooth face of the glass is on the inside.
A ground-floor unit or walk-up
Windows at footpath height, or onto a shared walkway. About two in three Chatswood homes are flats or apartments, and strata can have a say on how the glass looks from outside. Privacy from the tower opposite
What the street sees by day and at night
Privacy film works in one of two ways, and only one of them still works after dark.
Frosted and patterned film scatter the light that passes through them. Nobody sees through from either side, day or night. With a lamp on in the evening the pane glows, and a person standing right at the glass shows as a soft shape with no detail.
One-way film is a mirror film, and brightness decides who sees what. By day the street is brighter, so the footpath sees a reflection and you see out. Turn the lamps on after dark and it swaps: the street sees into the room and you see yourself. A room with one-way film still needs a blind or a curtain in the evening.
We say this before any film is chosen, not after the first evening.
Frosted film by day: the pane reads as pale, even frost from the footpath. Nobody sees into the room.
Frosted film at night: the pane glows with the lamp behind it. Someone right at the glass shows as a soft shape, with no face and no detail.
Lower sash frosted by day: frost across the bed and the desk, clear glass above it for the sky.
Lower sash frosted at night: the top sash shows the ceiling and the light fitting. Below it, only a glow.
One-way film by day: a mirror from the footpath, and you still see out.
One-way film at night: the room is on show, and you see your own reflection. A blind is still needed.
No film by day: shapes in the room show from the street, even with the sun out.
No film at night: the lit room is on show to anyone walking past.
Privacy that keeps the light
The reason to choose film over a blind is that the room keeps its daylight. Frosted film lets light through and softens it, so a front bedroom can stay private all day with nothing drawn across the window.
Covering only what the street can see keeps more of the window. A frosted lower sash, or a band set at the height people walk past at, leaves the glass above it clear.
We choose the film pane by pane on the measure and write it on the schedule, so a sidelight, a bathroom pane and a bedroom sash on the same front can each get something different.
| Frosted film | Looks like etched glass. Private from both sides, day and night. Suits bathrooms, sidelights and a whole lower sash. |
|---|---|
| Frosted band | A strip of frost at footpath eye height, clear glass above it. Suits a bay or front room where the view out still matters. |
| Patterned film | Lines, reeds or a period pattern in the frost. Private where the pattern is solid; the clear gaps show through. |
| One-way film | Private by day only, and it gives the street a mirror to look at. Suits a room that is empty or curtained after dark. |
Frosted film on a street window
What you give up
- The view out through the frost. Frosted film is private in both directions, so you do not see the street through it either.
- Some of the clear-glass look from outside. Frost shows from the footpath in a way a clear heat film does not.
- A dark window at night. A frosted pane with a lamp behind it glows.
What you keep
- Daylight, with no blind drawn
- The sky through a clear upper sash
- Windows that open as they always have
- The pane you have now, under a film that can be lifted off later
Obscure and patterned panes, looked at on the measure
Obscure glass is the textured glass in most North Shore bathrooms and in many older sidelights. Film only bonds to a smooth face, so the first thing we check is which side the pattern is on. When the smooth face is inside, film can go on it. When the pattern faces the room, we tell you on the measure what can be done, and sometimes that is nothing.
Leaded sidelights get the same look in person, pane by pane, before anything is suggested.
Frosting changes how a street front looks, which clear film does not. If the house is listed as a heritage item, or stands in one of Ku-ring-gai's heritage conservation areas, ask council before the front changes. Every council on the North Shore keeps its own heritage list. We never say whether film needs approval: that answer is council's.
A street side on the schedule
- W1Street side, sidelight, right of the door: Privacy
Leadlight: we look at this pane on the measure.
- W2Street side, front bedroom, lower sash: Privacy
- W3Street side, bathroom, obscure glass: Privacy
Obscure glass: we look at this pane on the measure.
- W4Street side, front room bay, centre pane: Privacy
Frosted band, height set on the measure.
When street privacy goes wrong
One-way film sold as privacy
Private all day, then on show the first evening the lamps go on. That should be said before it goes on the glass.
The whole window frosted
The bedroom loses its sky when only the lower sash needed covering.
Film over the texture
Laid on the patterned face of obscure glass, film does not bond and shows every ridge.
A mirror on a period front
Reflective film on a Federation street front changes the house as the footpath sees it, and council may have a view on that.
Street privacy questions
Can people see in at night through frosted film?
Not in any detail. With a lamp on, the pane glows, and someone standing against the glass shows as a blurred shape that fades as they move back into the room.
Is one-way film private at night?
No. Once it is brighter inside than outside, the street can see in. For a room used after dark, pair one-way film with a blind, or choose frosted film instead.
Can you frost only the bottom of the window?
Yes. A frosted lower sash, or a band at the height people pass, is the usual answer for a front bedroom. We set the height on the measure, standing where the footpath is.
Our bathroom glass is already patterned. Why add film?
Often you do not need to. Patterned glass can show more at night, close up or when it is wet. Where the smooth face is on the inside, film closes that gap, and we tell you which panes that applies to.
Will the window still open?
Yes. Film sits on the glass, so sashes and casements move as they did before.
Do I need council approval to frost a street-facing window?
We cannot tell you that, and we will not guess. Frost shows from the street, so on a listed house or in a conservation area, ask your council before it goes on.
More on the front of the house
- Original and leadlight windows
- Safety film for older glass
- Privacy from the tower opposite
- How we measure
References
- Ku-ring-gai Council: Heritage conservation areas. Where the council lists its conservation areas, and who to ask before changing a street front.
- ABS Census 2021 QuickStats, the source for the share of Chatswood homes that are flats or apartments (the Chatswood suburb summary).