I have internal curtains and blinds and this actually still works well, at least better than keeping them open. Maybe it would work better with externals but this is still worth doing if all you have is internal
Internal light protection is better than no protection, but external protection is miles better. Also curtains with white blackout backing are better than coloured options or dark backing.
Well, the more light you reflect out the better (I would expect that, for example, darker color curtains would be a problem) and ideally you want that whatever light does get converted into heat does so outside.
As it so happens, were I live the heat has been a problem in the Summer since well before AC was invented, so roll-up external shades are standard for all houses and apartments and that stuff definitely works if used as I described it.
Agreed. We do the same. It would work better externally but price is exorbitant here for such options. We also do all the same as OP and it works really well. Especially opening early morning at dawn to cool everything down.
I have internal curtains and blinds and this actually still works well, at least better than keeping them open. Maybe it would work better with externals but this is still worth doing if all you have is internal
Internal light protection is better than no protection, but external protection is miles better. Also curtains with white blackout backing are better than coloured options or dark backing.
Well, the more light you reflect out the better (I would expect that, for example, darker color curtains would be a problem) and ideally you want that whatever light does get converted into heat does so outside.
As it so happens, were I live the heat has been a problem in the Summer since well before AC was invented, so roll-up external shades are standard for all houses and apartments and that stuff definitely works if used as I described it.
Agreed. We do the same. It would work better externally but price is exorbitant here for such options. We also do all the same as OP and it works really well. Especially opening early morning at dawn to cool everything down.