ᐅ 36 cm Ytong exterior wall, solid construction, mold formation, insulation

Good evening,

E.Curb schrieb:
There are those who swear by aerated concrete (many greetings to Bauexperte),
Nope – I only go for monolithic construction – but aerated concrete is included in that. Greetings back

The rest: agreed

E.Curb schrieb:

I have to admit that I see most advantages in calcium silicate bricks.

Yep – unfortunately, you usually need something wrapped around the outside, which almost always means choosing between two drawbacks. But calcium silicate bricks are at least suitable for interior use.

Best regards

Bauexperte schrieb:
...Yep - unfortunately, something needs to be added on the outside, which almost always means choosing between two bad options.

I completely disagree. Trying to satisfy competing requirements with a "one-size-fits-all" solution is usually second best. It may be cheaper initially, but in the long run, it is less sustainable.

Regards

Hello €uro,

€uro schrieb:
Then believe in this nonsense (...) I know these websites. They cause more harm than good.

Aha, I still can’t see the harm that this website (exactly one site, by one Mr. Plag) is supposed to cause. On the web, you can find many comments from home builders who have later confirmed the general accuracy of the calculations.

Then try to get a written guarantee from them for this rubbish. However, I suspect that won’t happen. A knave who thinks ill of this is suspicious.

Why so concerned? Since I don’t pay anything there and haven’t registered, I guess the gentleman won’t give me a guarantee either—why should he? For me, it is about being able to roughly compare different concepts given a budget in advance without a planner. For that, I neither want to spend money on an independent planner nor consult a planner dependent on the respective general contractor.

By concept, I mean:

1. U-values vs. cost of foundation slab, wall, window (including solar gains), ceiling/roof
2. Other aspects: algae/mold susceptibility of the façade + thermal insulation + possible condensation issues
2. Ventilation with/without heat recovery and with/without earth air tubes
3. Heating technology (still gas, already heat pump, air-to-water heat pump, ground-source heat pump, etc.)
4. Solar: useful beyond KfW70/55 program?

The gentleman helped me with his calculations in this regard. Bad?

Anyone who thinks modern system technology can be used without solid and precise fundamental data collection, planning, and sizing with the highest energy efficiency is mistaken. They might as well choose an open wood fire as a heat source!

I follow up: You mean that today’s heating systems react much more sensitively to planning errors with a reduction in efficiency than older technology? Does this already apply to gas condensing boilers or only from heat pumps upwards?

o.s. schrieb:
... Aha, the damage that the page (exactly one page, by a Mr. Plag) is supposed to cause, I cannot yet see.

How should a layperson see it, since the necessary technical training is lacking.

o.s. schrieb:
... On the web, you can find many comments from homeowners who have later confirmed the fundamental accuracy of the calculations.

Anonymous? How naive can one be? Only the gullible fall for forged, anonymous positive reviews used as sales support. This caters to customers seeking valuable results at no cost. Even a US presidential candidate has used this tactic.

o.s. schrieb:
... The gentleman helped me with his calculations. Serious?

Not at all, if you want to believe it. The significant and economic questions in the overall context were not answered!

o.s. schrieb:
... I follow up: You mean today’s heating systems react much more sensitively to planning errors with a reduction in efficiency than older technology?

Correct! Although it is less the efficiency itself and more the seasonal performance factor (SPF) or, for heat pumps, the annual performance factor (APF) that are decisive.

o.s. schrieb:
... Does this already apply to gas condensing boilers or only from heat pumps upwards?

This applies to all heat generators given today’s and foreseeable future energy prices.

Best regards.

Hello €uro,

€uro schrieb:
I completely disagree. Trying to satisfy competing requirements with a "universal" solution is usually a second-best option. Initially cheaper for sure, but not sustainable in the long run.

No, it should be the top priority; I assume everyone understands that this "universal" solution, as you put it, does not come cheap.

Kind regards

Can this be explained a bit more clearly?
What do you two experts mean by "Universal"?