Posted 24 December 2015 - 03:37 PM
Apologies if I have posted in the wrong section.
We are planning a extension with glass doors and windows in the bedroom gable end, leading on to a small balcony.
Does anyone have any experience or can recommend where we can purchase electric privacy glass or film that fully blacks out? Everything I have seen so far turns opaque but not black out.
I really want to avoid blinds as feel this will spoil the look.
Hope someone can help!
Posted 24 December 2015 - 03:52 PM
To the best of my knowledge there is no totally opaque electrochromic/liquid crystal glass available. The stuff can only switch between the transparent mode and a translucent mode, that passes some wavelengths through.
The technology is similar to LCD screens, and the reason you cannot get a blackout version is exactly the same as the reason that an LCD TV can never render true black, only a dark grey. There has been a lot of research on trying to make LCDs opaque to all wavelengths when the crystals are flat but it hasn't yet been done, which is one reason why so much effort has been put into alternative screen technologies, like organic LEDs (OLEDs), as they deliver a true black when off.
You may want to look at some of the clever blind systems available that will deal with angles in gables, as I think these are going to be your only realistic choice.
BTW, electrochromic glass is mega expensive, too!
Posted 24 December 2015 - 04:24 PM
In addition to coating glass and making sealed units they say they also have a film that can be applied/stuck to existing glass
Posted 24 December 2015 - 04:45 PM
When we were fantasizing about the same thing we looked at this probably not quite what you want, but may be worth a look.
And then woke with a start when we looked at the numbers. Debbie (SWMBO) really likes those ultra-thin blinds you can get.
Happy festive season anyway!
Posted 24 December 2015 - 09:43 PM
Posted 24 December 2015 - 09:57 PM
Probably not. The best I've seen goes from near-transparent (when on) to a sort of milky white when off, so even a couple of panes aren't really going to make for a blackout blind.
Not sure what the cost is now, but when I was looking at the stuff it was £1000/m2
Posted 24 December 2015 - 10:06 PM
Posted 24 December 2015 - 10:34 PM
Posted 24 December 2015 - 10:41 PM
Posted 25 December 2015 - 12:09 PM
+1 to that. You can't see through them because they scatter the light but they don't block it much. Some can be used as projector screens (back projection).