Privacy is the main reason many people use window treatments in their houses. Whether others outside can see through blinds or not at night really depends on the type of binds you use and the fabric materials on it: blackout, transparent, or translucent.
Generally, what you see outside through blinds during the day is what others will see inside at night. A blackout blind is a great option if you’re looking for 100% privacy. You can see through most types of blinds at night as long as they’re not blackout blinds.
Roller blinds are designed to either block light from entering or exiting a room, so it is difficult to see through them during the day. However, at night when the lights are turned off, some roller shades can become somewhat transparent, which allows people to see outside.
Someone outside couldn’t see through your roller shades if they have blackout lining. Although the lining itself will not be completely opaque from outside – depending on how sheer the fabric is – it will still be much harder to see through than the shades without it.
Light Filtering Blinds
Light filtering blinds are blinds with either transparent fabrics or translucent fabrics.
Transparent fabrics allow light to enter the room, and you can look through them to obtain a view of the outside, which means that when you close the transparent blinds and switch on the light inside the house at night, outside people can see but not clearly enough to distinguish objects and people.
However, for blinds with translucent fabrics, others are not able to see inside when you lower the blinds at night.
If you’re worried about someone being able to see inside your room at night, it is better to use blackout blinds instead of light-filtering ones.
If you’re looking for a 100% privacy blind at night, better tell the supplier your request so that they will recommend the right one to you.
You can also test by yourself: others cannot see through your bind when you turn on light at night if you cannot see outside through your bind in the day time.