Exterior blinds for shading in summer

I don’t know how I’m supposed to take such statements from prospective homeowners / Silke seriously. Sorry. But in summer it doesn’t work without venetian blinds and roller shutters (you can clearly see this in every housing estate - every single one without exception is shaded) and after 3-4 days at/above 30 degrees you can no longer air out the heat. But everyone has to make this experience for themselves when there is a lot of glass in the south.

Just accept that people are different. If I have 30 degrees outside during the day and many windows open, I’ll also have 30 degrees inside. We like that, just not for sleeping. If I have such temperatures during the day, I’m outside anyway, so I don’t care how warm it is inside. If I have 20 degrees at night (or 22 for that matter, it’s almost never more here, last summer we had 5 nights with over 20 degrees), then at night I get the 20 degrees from outside inside the house again if I keep the windows open all night across the house. Additionally, our bedroom faces north, so no sun ever comes in; by the time the sun comes around, it’s behind the neighboring houses, it will never get 30 degrees there because the door stays closed during the day. And if it should be completely different in the new house than I’m imagining, there will be an air conditioner in the bedroom. Then it just has to run at night during the few really hot nights.

Just accept that people are different. If I have 30 degrees outside during the day and many windows open, I also get 30 degrees inside. We like that, just not for sleeping. If I have such temperatures outside during the day, I'm usually just outside anyway, so I don't care how warm it is inside. If I have 20 degrees at night (or 22, as far as I'm concerned, it’s almost never more than that here; last summer we had 5 nights over 20 degrees), I get the 20 degrees from outside back inside the house at night when I keep the windows open across the house all night. Additionally, our bedroom is in the north, so the sun never comes in; by the time the sun is around, it's behind the neighboring houses, so it will never get 30 degrees there, especially since we keep the door closed during the day. And if things turn out completely different in the new house than I expect, a climate control system will go into the bedroom. Then it just has to run at night on the few really hot nights.

I’m saying you’re not taking the new house into account. If you have around 30 degrees or more during the day, you won’t just have 22 degrees because it’s 22 degrees in the evening and you’re ventilating. The building envelope is so heated that as soon as you close the windows, it immediately goes back to 25.x degrees, and we have a really well-insulated house with a concrete ceiling and so on. We also have more glass than wall on the south and west sides (ground floor). At 6 a.m. in the morning, after ventilating briefly for one hour at 17 degrees, the temperature immediately rose back to 20 degrees on the ground floor after closing. If you then leave the patio door or windows open (not shaded) and don’t close them right away or want to close them later, I advise you, no matter how different you might be, to prepare for an air conditioning system. I’m not the only one here telling you that what you believe is “unrealistic.” But, and I have to qualify this, up to 25 degrees in summer with inclined blinds is really comfortable, even at night.

Depending on the neighboring buildings and shadow casting, I would also put a venetian blind on the western window. In the late afternoon/evening when watching TV, you always have to lower the roller shutter to avoid glare – that would be too uncomfortable for me.

We have 2x 2 door elements on the south side (as the only windows, semi-detached house). In front of one half there is an awning, in front of the other a glass canopy with shading. In high summer, it’s enough to extend those from 11 a.m. to keep the sun out of the room.
Currently not, because the sun is still too low and shines underneath. And if anyone has light-sensitive furniture or pictures or other collections in the living room, they would rather put a venetian blind on "half-mast". Just as another point, I don’t know if you have light-sensitive hobbies.

The heating up of the house in summer also depends on the glass surfaces, in some designs up to 120%, with and also with us about 50% of the south/west facade and since it is a bungalow, in summer under the roof overhang or under the awning. I do not lower the blinds when I constantly go through this patio door, living with and in the garden is the order of the day

I’m saying you’re not starting from the new house. If you have around 30 degrees or more during the day, you won’t have 22 degrees just because it’s 22 degrees in the evening and you ventilate then. The building envelope is heated up so much that as soon as you close the windows it directly goes back to 25,x degrees, and we have a really well insulated house with a concrete ceiling and so on.

I wasn’t talking about ventilating for 1 hour in the evening, but ventilating at night. Meaning: all night. Or at least a few hours. But normally on such days we sit outside until bedtime anyway, during that time the windows and doors are open, so when you go inside at 10 pm you no longer have 30 degrees inside because it has been significantly cooler for several hours. But never mind, I see I’m alone in the wilderness with my opinion. For me, sun and any kind of shading don’t go together mentally, it’s a horror to me. When there’s sun, everything that can be opened must be opened and I have to go outside if possible.

... I'm not going to pull down the blinds when I constantly go through this patio door, living with and in the garden is the point

I'm glad that our main exit to the terrace is covered and therefore always in the shade :) On the south side, the blinds go down to 70% when the sun shines. That is enough as sun protection and does not make the room too dark.