SHADE NEEDED

We have a similar issue in our kitchen and bought these. Super cheap and you can remove them after summer.
https://www.ikea.com/gb/en/p/schottis-pleated-blind-white-20242282/

Get a reflective blind/s over the windows, install a canopy/sail shade to back of your property. Sounds like you could attach to the wall of your neighbours extension?

https://www.laredoute.co.uk/ppdp/prod-350063699.aspx?dim1=1&dim2=1&cod=PSN00201044UK&gad_source=1&gad_campaignid=20641023351&gclid=CjwKCAjw7MLDBhAuEiwAIeXGIV60OPE8nR9TKcDTVPHuHwBX2xidPlaLTTR1n8zJ8vJ12rdU5GwPyBoCEN8QAvD_BwE

Get Blackout concertina paper blinds -they’re thick cardboard , are cheap & last really well & have a peel off sticker to fix to your pvc frames. Get several & keep closed with windows closed. Don’t use the kitchen at hottest time of day. Too hot to cook - prepare a salad or have sandwiches out of fridge & eat in living room. Close door to kitchen at al times & keep your window blind shut. Miserable but the only way. Long term invest in a permanent awning type thing & /or mirror window uv film.

OP, I found the perfect temporary solution for this problem. I taped cardboard over the entire window on the inside frames. The cardboard stops the sun and acts as insulation from the heat.
I promise this works! HTH

Spray the window wuth water. Float tin foil on the inside of the windows. Total blackout. Don't do what I did and use window cleaner in the water...I did this on one window and the heat permanently etched the windows I thin because of the chemicals! Just water is best 😉😎

A gazebo really helps, but a cheap one is no good. Ours cost about £300 2-3y ago, and we tie it down on 3 sides to wall-eyes drilled into the walls. The 4 th corner is tied down with a guy-rope to a ground anchor in the lawn. So that's not an instant solution. Definitely one with doing, though.

Temporarily, a no-DIY solution is to buy white paper tablecloths and black paper tablecloths from Amazon (must be paper, not plastic or whole-clean 'paper'). Cover your windows by taping on a couple of layers of white paper on the inside. These will reflect some of the sunlight. Next, take the black paper over the white. This will cut down on glare. Do not skip the white paper as it reflects the heat as well. Black on its own will bring more heat into your kitchen.

And stop cooking.

Can you fit blinds to the window and patio door? Or a light voile curtain? We have blinds in some rooms (not for sleeping) that are very thin and light, they let through lots of light but offer privacy but they would also have the affect of reducing glare.

I’m looking forward to my shop-bought quiche and salad tonight and no doubt so are the hundreds of other shoppers who haven’t bought one 😁

Do you have enough space to install an awning outside your kitchen to shield the room from the sun?

I feel your pain! Do you have a table with an umbrella outside, or gazebo or anything like that?

I've currently got an old garden umbrella balanced on top of the open kitchen widows, and pillow cases over to opposing windows elsewhere in the house. Any shade that stops the heat before it gets into the house seems to make a real difference. I'm currently researching external window shades!

A more expensive fix is a retractable canopy attached to your house we had one fitted a few years ago. It was a worthwhile investment as it shades the double doors and most of the back of the house on sunny days. We also had blinds fitted to the UPVC windows as part of our update the house regime. These have the added benefit that in winter it provides an extra insulating layer to help keep in the warmth on cold dark nights.

I haven’t time to RTFT so apologies if this has been suggested but we have this: https://amzn.eu/d/6eXutKD on our south facing patio outside our kitchen. Also on Prime sale at the moment

I've spent too much time with teenagers. I thought this was going to be a thread asking people to come and bitch about something or someone with you

This
amzn.eu/d/clCU04i

Maybe get table outdoors, extension lead and use instant pot outside?

Cover the windows in foil. Your house eill lol like a crack den, but needs must. Foil will fully black out the light

Stop cooking in extreme heat

Your son can survive on cold bits, buy him a french baguette and cheese and meats and crisps and dips and fruit and chicken bites etc. He can survive.

We have massive south-facing sliding doors and put one of those triangle IKEA awnings outside. It's bolted to the brickwork and the 3rd corner attached to a tent pole or telescopic washing line pole stuck in a ground spike (the kind for rotary airers). Cheap and does the trick for now.

The coolest part of my garden, though, is in deep shade under a tree, so I may plant trees nearer the house.

Perfect fit blinds will cover the glass.
A more robust awning, pergola or veranda to stop the sun hitting the glass in the first place. Could you fit a sail?

Calm down and get some blinds. The ones that fit into the frame of UPVc windows and run up and down on strings.
Loads of places sell them online. You can even get thermal ones that will reflect heat out.

Or put some solar film on the glass.

Or build a pergola across the back of the house and grow a climber.

If you can’t afford that then pin a dark sheet up.

Just finished sticking up thick, grey bubble wrap on East facing glass. I need to lower the room temperature to under 25c to varnish painted furniture.
With a floor fan on, it's feeling better already.

We were watching a video yesterday from France and they had the outside electric shutters on the windows. I said to my DH then that I can see more UK properties having those if these hot temperatures keep up.

As you say, the key point is stopping the heat getting to the glass in the first place, so shutters on the outside are so much better than inside black out blinds, etc, that are just trapping the hot air inside.

In your case I would literally tape a blackout curtain to the outside of the window as a temporary measure!

Our kitchen is East facing and the bedrooms west facing, so we have your kitchen problem in the bedrooms at night. I know everyone says shut the windows, curtains and blinds when the sun is on that side and open the shady side. We did that last week and it was even hotter. There's no through draught once the sun's gone down to get the heat out. When you're standing outside you can literally feel the heat resonating off the bricks from around 2 foot away.

Our kitchen is roasting in the morning but we have a side door which is north facing, which lets enough of a cooler breeze through. On exceptionally hot days I have put the patio parasol up outside the window and it definitely helped.

I do regularly find myself wearing sunglasses in the kitchen though! Next door have just installed an awning and I'm very tempted...

Tin foil and sticky tape on the windows.

Wow ,you poor thing .That's awful and I completely sympathise .The heat ,the glare and lack of air would have had me sobbing in the corner .
No way am I telling you to calm down!