Large south facing window in DC room (heatwave)

[chocinthefridge]

Our two boys share a bedroom. This room has a large window which is completely south facing and gets sunlight from 5am - 10pm in the summer. The room gets hot and stuffy with the two of them in there. The room isn't massive so their two beds are near the window. There can be no other configuration. This window has an electric blackout blind and blackout curtains. In the current heatwave, the blind is actually hot to touch and the room is so hot and stuffy. We have an air cooler but it doesn't do much to be honest. Just wafts more stuffy air around the room. What can I do to cool the window area/reflect the sun? We can't have an awning outside as this window is high up on the first floor of the house.

Can you have the windows open?

Put foil (wet) on the inside of the windows?

We have windows open and curtains shut in the whole house. Fans in every room and sheets in freezer before bed

Keep the blinds and curtains closed.
a fan blowing over a bowl full of iced water will help
just sheets on their beds to sleep under

Bedrooms are east and west facing here. I've just gone and lined the inside of our windows with some leftover reflective insulation (Left over from lining the loft last year) I keep the windows and curtains closed while the sun is on them anyway, but it seems to have made some difference.

OP, you could try lining them with kitchen foil, shiny side out. It should static cling with a misting of water, but it's so hot I'd be surprised if it worked. I'd just use tape, and try to fit the foil as close as you can.

Both the kids rooms are on the 2nd floor and get sun 1 till sundown, it’s horrid up there. I’ve just taped some foil to both windows in the desperate hope it helps a little. I think some of them may end up sleeping on the floor in the living room one night!

DS's room is also south facing. Keep the blinds and curtains closed all day, and DO NOT open the window. You will just let the hotter air outside come in and make things worse. The only thing I have found helps at all is a fan, just to create a bit of a breeze. It's still a hot, stuffy breeze, but it is better than nothing.

We keep windows (facing the sun and road) closed and blinds shut between 10am and 5/6pm.
Windows facing the garden and shade are open to allow air to circulate in the house - keep all internal doors open too.
On days over 32degrees I have closed the house completely during peak hours to keep us cooler - we have good loft insulation and double glazing which makes a difference.

We open things up in the evening to allow the air to move - it's cooler as we haven't allowed heat to build over the day.

We have the same. Keep blinds and windows shut. It does get a bit stuffy but I find a fan doesn't help at all. Dts we're still under the duvets last night and we're in London.

Our bedroom is south facing and we have two small cottage type windows, though not a cottage. I have all the windows open and then have the blackout blind pulled down halfway. At night the windows are kept open and we just close the blackout curtains and leave the blinds pulled up. I am finding this is helping to keep the room quite cool, and I fact last night when I got up to go to the loo, the hallway was much warmer than our room which felt cold in comparison.

You can buy a film, we have it on one room. Iys there all year.

Whilst i get you coukdnt fit an awning permanently, could you hanf some green house shading on the outside someehow. Sort of wedge it in the top of the window.

You can install an air-conditioning unit inside their room, on the wall. The outside box of the air-conditioning unit will also need to be added on the back of the house somewhere. I come from a very hot European country and this is the normal standard in almost all houses and flats there. I believe it is not too expensive to get installed. A life-saver during the heatwaves.

Something like this. It is around £600 to purchase and I assume additional to get it installed. So, yes, a bit pricier than I thought, but definitely worth it.

@Blueeyes27

I'm pretty sure the OP isn't trying to deal with a heatwave in the UK in November.

Wow, that’s not a nice comment to make. Well done for being so smart. Clap, clap, clap all in unison how smart that was of you. You must be so proud of yourself. I’m sure the intended person my helpful comment was for appreciated the fact we have all been experiencing global warming effects unfortunately here to stay with us and therefore she may have been considering how to tackle this issue in the future next year when it’s hot again. Or you think it will always remain to be November?

One of our boys has a south facing window (the other north facing so I really can feel the difference in temperature). Also they are attic bedrooms so have the propensity to be warm anyway. We have mini A/C units in each room and blackout curtains, also we keep them closed all day to keep the heat out. During a really hot week this year we had them sleep downstairs but usually all the above is adequate.

Thick triple lined curtains really helped during our heatwave

I'm pretty sure the OP isn't trying to deal with a heatwave in the UK in November.
I missed the date on the OP but I had assumed it was someone being smart and thinking ahead to next summer, with sales/Black Friday offers.

Fair point, but it is more likely that this thread popped up as "you might also like" (or whatever they are calling it today).

So many people on MN can't afford to put their heating on so I doubt they are out buying AC units for a heatwave that might not even happen.

Apparently I'm the one being smart 😅