Y-Tong vs Concrete without extra insulation in practice (heating costs)

  • Erstellt am 2019-02-28 17:02:30

yellow_ms

2019-03-01 10:17:13
  • #1
Yes, there is sometimes a harsh tone on construction sites. But do people in the house-building forum always have to snap at each other like that? In a forum, you ask questions. Yes, sometimes there are questions that don’t seem very well thought out, that one might answer with a 5-minute Google search, etc. But you can still write that normally, can’t you?

Edit: By the way, I don’t see the question here in any of these categories
 

Lumpi_LE

2019-03-01 10:29:21
  • #2

This is an exposed facade; the insulation is in between, costing a fortune. Buildings without any insulation haven't been constructed for about 100 years.
 

nordanney

2019-03-01 10:38:08
  • #3
Does not look like solid construction, but rather like a curtain wall facade. And yes, insulation ALWAYS with concrete construction. Either as a sandwich (e.g., with prefabricated parts, there is a Nordic provider who only build this way, but are not represented in Germany) or with insulation applied on the outside.


Very simple answer (which you can also give yourself): It depends. The same house built monolithically with Ytong or double-layered with sand-lime brick + core insulation and clinker or whatever (e.g., concrete) and the same heating technology will have comparable heating costs if the occupants have identical heating behavior.
You can also build to KfW 40 and have higher heating costs than a "normal" efficiency house. That then depends on the inhabitants or the nice calculation method for KfW classifications.

P.S. If you want to invest around €5 million like in your example house, you should rather look for good architects and craftsmen than worry about peanuts like €100 heating costs more or less per year.
It won’t be cheap to build like that, since you are an exotic/enthusiast with it. Exotics simply pay much more. It's like with electric cars. They are simply too expensive in terms of price/performance ratio.
 

dertill

2019-03-01 12:04:41
  • #4
Because today is Friday:



The solar heat gains with triple glazing are indeed lower than with double or even single glazing. However, the reduced gains are more than compensated by the saved losses. In summer, it even helps a bit to prevent excessive heating.



ONLY concrete heats up very quickly in summer and the house would also heat up quickly when exposed to sunshine in summer, because any heat arriving from outside is quickly transferred inside. You can do without air conditioning with intelligent design, regardless of concrete. This includes roof overhangs, window orientation and size, and for planning mistakes there are venetian blinds.



The difference between NO insulation at all and today’s new build standard is very large, no matter if made of concrete, wood or clay. Today’s standard or the current requirements for ancillary buildings and their energy demand and the theoretical calculation of this may be somewhat exaggerated, but a building made purely of concrete is pointless in every respect.



Without asking each individual, I’d bet that no one does. “Modern” living (warm, without mold and frost on the walls) is not possible in a pure concrete building (above ground). Due to poor thermal protection, the walls inside would be freezing cold, which would cause water to constantly condense out of the air and freeze in winter. You would have to heat enormously to counter that. Additionally, a huge air exchange would have to be ensured to remove moisture and minimize condensation, which again leads to increased heating demand. This is clearly seen in old brick buildings without insulation made of 24cm solid bricks. There you have to ventilate and heat a lot to avoid problems with condensation and mold. To achieve the same thermal protection as the 24cm bricks, pure concrete walls would have to be about 70-80 cm thick—and that would still be rubbish.



By the way, concrete is a first-class vapor barrier. Nothing is vapor-permeable; after 20cm thickness, almost nothing passes through.



That was already answered. They might have concrete on the outside or inside, but there is always insulation in the middle.
 

Keishadow

2019-03-01 12:05:40
  • #5
It’s not about whether you can afford to pay it or not. If it costs €200 more per month, you can do it. But more energy means higher environmental impact, and that is linear with energy costs. It could have been that there is a concept here that is expensive but saves energy for heating in the long run and thus protects the environment. You never know how advanced the technology is. Besides, it was also about the combination of winter -> heating, summer -> air conditioning. But anyway, I consider the thread closed. If decades ago someone had said you could cut stone with water, no one would have believed such a thing is possible with the right method. You just have to ask questions to get information.
 

Keishadow

2019-03-01 12:07:42
  • #6
Cool. Thank you very much! That's exactly the information I was looking for. So there is something in between after all...
 

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