Blackout paint on double glazed window?

[Vet Tech]

Hi,

I have a Velux loft escape window which is bothersome because it lets in too much light directly above the bed. I fitted a Velux roller blind in dark blue but even now, too much light comes through.

I'm considering spraying the glass with a matt black paint. Are there any potential problems with this?

I ask because I researched tinted film and the advice was dont do it on double glazingg because of differential heat absorbtion between the two panes of glass and the fact that the film restrained expansion of the pane on which it was applied.

Any expert opnion would be much appreciated.

VT

[Peter Andrews]

I would block the window with a thin sheet of ply and held in place with small clips or magnetic strip - easily removable and 100% opaque.

Peter

[Dave Liquorice]

Pretty sure you can get proper blackout roller blinds for velux windows. The blind is opaque and the edges run in a channel attached to the sides of frame. Google is your friend...

[Andy Dingley]

Is the blind light proof? Most fabric isn't, real blackout fabric is deliberately coated to fill the gaps in the weave. Changing the fabric would seem simpler than the glass.

Otherwise tape or pin up a piece of fabric (or window tint film) across the frame. So long as it isn't bonded _to_ the glass, the heat issue isn't a problem.

[Dave Osborne]

Fit a proper blackout blind? e.g.

(Velux Shop)

[Vet Tech]

It's a roller blind and the fabric doesn't reduce the light much. I wasn't able to get a Velux blind that was complete blackout . I dont think they do them.

And being a roller blind there is quite a substantial gap down both sides.

Any comments on the paint idea?

[Vet Tech]

Dave ,

Thanks for the link but they dont appear to do one for the Velux conservation escape type window. Its a diffrent design from the regular velux window. Its very much like an old style metal loft window.

Vt

[meow2222]

and its not much of a challenge to make one.

Better to use white paint than black, lot less thermal trouble. If you want 100% blackout, white paint then black paint.

NT

[Baz]

Seeing you bothered to ask here, why don't you ask Velux? Baz

[Dave Osborne]

Well then, you could call your friendly local blind company who will come round and measure-up and will make you up a made-to-measure blackout blind, complete with opaque material and ally side/bottom channels. Not cheap, but surely better than losing the light altogether?

[Grimly Curmudgeon]

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Vet Tech saying something like:

I did exactly that a decade ago with an excess small gable window and there's been no trouble with it at all. Indeed, on another one I reversed the process by simply scraping the paint off with no ill effects.