Experiences with "Thermo" curtains / fabric roller blinds as thermal insulation?

Hello everyone,

Recently, the topic of "thermal insulation in modern houses" has often been discussed in various threads. Keeping the heat outside in summer nowadays seems to be almost a bigger problem than losing heat in winter.
Venetian blinds, roller blinds, awning / sunshade, or just build a canopy? There are different camps / supporters here, which is completely legitimate.
But what I haven’t heard from anyone yet is that, for example, in the upper floor children’s rooms, on a sunny summer morning, they simply close the "Thermovorhang" to prevent them from heating up during the day. Logically, one would use a lighter curtain that reflects the sunlight the most. Accordingly, it should—unlike a lowered roller blind—let in enough light so that the children can play in the children’s room during the day without having to turn on the light?

Has anyone installed such special Thermo-curtains as heat protection and can share their experiences with them?

I see the "office building" style as a con for Venetian blinds and for roller blinds the too dark room if you lower them almost completely. Without wanting to start another Venetian blind – roller blind discussion here. It should primarily be about curtains. Or maybe about these double-walled indoor fabric roller blinds? Do they keep the heat out?

Thanks in advance
Ludwig

The curtains let the heat in. Heat protection must work from the outside.

Blinds:
1. In summer, you rarely have to lower the blinds all the way down. The sun is quite high.
2. Rooms with multiple windows on different exterior walls do not have to be closed at the same time. For example, one in the east and one in the south.
With us it is never so dark that you need light when we are at home.

I think the shading, when and how deep, can also be controlled electronically.

*Addition: At the current stage, I find an automatic awning / or a sun sail for the ground floor as the preferred means of blocking heat during the day. And at night, blinds as protection against sight/cold/"burglary". But now I'm concerned about the rooms on the 1st floor on the south side. There, a sun sail is rather not suitable, right? Therefore maybe thermal curtains or thermal inner blinds, which still let light in during the day but keep the heat out.

Or are there actually sun sails that cover both floors?

*Edit [USER=9254]@haydee if you have children's rooms with only one south-facing window on the upper floor, your 2nd point unfortunately no longer applies. Otherwise, of course, you are right.

It is probably really as already wrote:



Therefore, it must really be an automatic awning / sun sail outside the windows
instead of quite visually appealing honeycomb pleated blinds from DUETTE, for example.

Or a venetian blind running below a glazed aluminum frame?

If there is only one exterior wall in the room, it does not work. It depends on the planning and can be kept in mind. In a classic layout, the ground floor is the living area and the upper floor are the children's rooms that need natural light. Bedrooms, bathrooms are secondary.

By "das" do you mean the awning/sun sail on the terrace?