Blackout for velux window - help!!

[Tanira2]

Our child sleeps in a room with a velux window. We bought the blackout blind that fits into the window, which is great, until you want to open the window, then you're defeating the point of having it, the light comes through the open part.

I can't be the only one with a velux window who wants to open it in this heat. Does anyone have any suggestions how to black out the window on the cavity, rather than the window itself?

I've looked at groblinds but they need to stick to the window itself, so that won't work either.

We don't open ours at night.
Have no wish to be joined by pigeons, or indeed rain if the weather changes.

Not opening it would solve the problem but that room is the hottest in the house.

It can't let in air and not light, and we have tried every product going.

You need to keep them shut and dark during the day as that really cuts the heat down then open when the direct sun has gone.

We use exterior blinds - the metal ones - down at night but with the window open and an internal mosquito screen to keep our little bitey friends out.

It's darkish but not perfect.

you could do Velcro blinds but you’d have to put the Velcro strips on the wall/plasterboard around the velux. Wouldn’t look great..