Hello everyone,
we are currently planning our house, and our developer is offering us 40 cm (16 inches) Ytong for the exterior walls. Some time ago, I spoke with an independent building expert because I was looking for the right type of block in terms of
- sound insulation between rooms
- summer heat protection
- winter thermal insulation
He said that the only material that really protects longest against the sun is sand-lime brick with an external thermal insulation composite system (ETICS) (for example, 17.5 cm (7 inches) sand-lime brick with 16 cm (6 inches) ETICS, possibly in other versions or as a natural product). According to him, this is the only way to keep the heat out in summer, retain heat inside in winter, and also provide sound insulation. For sound insulation, I could also use Ytong on the outside and sand-lime brick on the interior walls, but this requires careful workmanship (groove cutting) to prevent cracks in the walls.
From the interior perspective, he said that sand-lime brick retains the heat from a stove or similar sources better than Ytong.
So now I’m stuck... I’ve really done some research... but I’m confused again :-(
Can anyone help? To what extent is choosing sand-lime brick maybe considered "old-fashioned or cheap"? Or is Ytong with sand-lime brick interior walls the optimal solution?
Thanks in advance... please have mercy on a building beginner ;-)
Best regards,
Markus
we are currently planning our house, and our developer is offering us 40 cm (16 inches) Ytong for the exterior walls. Some time ago, I spoke with an independent building expert because I was looking for the right type of block in terms of
- sound insulation between rooms
- summer heat protection
- winter thermal insulation
He said that the only material that really protects longest against the sun is sand-lime brick with an external thermal insulation composite system (ETICS) (for example, 17.5 cm (7 inches) sand-lime brick with 16 cm (6 inches) ETICS, possibly in other versions or as a natural product). According to him, this is the only way to keep the heat out in summer, retain heat inside in winter, and also provide sound insulation. For sound insulation, I could also use Ytong on the outside and sand-lime brick on the interior walls, but this requires careful workmanship (groove cutting) to prevent cracks in the walls.
From the interior perspective, he said that sand-lime brick retains the heat from a stove or similar sources better than Ytong.
So now I’m stuck... I’ve really done some research... but I’m confused again :-(
Can anyone help? To what extent is choosing sand-lime brick maybe considered "old-fashioned or cheap"? Or is Ytong with sand-lime brick interior walls the optimal solution?
Thanks in advance... please have mercy on a building beginner ;-)
Best regards,
Markus
Häuslebau3r4 Sep 2015 12:53Sebastian79 schrieb:
Ytongg is a manufacturer—mainly of aerated concrete that is not filled 😉.
KfW values always result from the overall interaction of various factors—not just the external masonry, as is often the case here (currently, energetically rather poor masonry).That’s why I specifically pointed out the masonry. Because nowadays, only the values of the blocks themselves are considered in relation to KfW70/55. 🙂
Yes, Poroton blocks are filled with perlite between the chambers. Unfortunately, I don’t know yet how their prices compare or how far apart Ytongg’s aerated concrete is from, for example, calcium silicate blocks with mineral wool.
I also assume that KFW70 standard can be achieved with any of these types of blocks... it depends on the rest of the construction, of course.
We have also planned a centralized ventilation system...
Regarding the external thermal insulation composite system (ETICS), many people say that the exterior walls turn green, supposedly because of the temperature differences between the polystyrene insulation and the render?!
How is the calcium silicate block combined with ETICS for indoor climate, or does it not matter if you have a centralized ventilation system?
We have also planned a centralized ventilation system...
Regarding the external thermal insulation composite system (ETICS), many people say that the exterior walls turn green, supposedly because of the temperature differences between the polystyrene insulation and the render?!
How is the calcium silicate block combined with ETICS for indoor climate, or does it not matter if you have a centralized ventilation system?
There is no such thing as a perfect solution that combines all advantages. Every option has its pros and cons, and in the higher-end segment, in my experience, construction tends to be more monolithic.
In the end, many homeowners start with extensive research on masonry but eventually realize that this is a topic best discussed with the architect and structural engineer, who will also carry out the necessary calculations.
My personal opinion is that when I knock on the facade, it should sound like a solid, quality house to me ;-)
In the end, many homeowners start with extensive research on masonry but eventually realize that this is a topic best discussed with the architect and structural engineer, who will also carry out the necessary calculations.
My personal opinion is that when I knock on the facade, it should sound like a solid, quality house to me ;-)
EveundGerd8 Sep 2015 23:10We built with Ytong and moved in just before the heat wave this summer.
Our house is detached. Each side receives sunlight at different times of the day.
Our ventilation system is decentralized and was controlled based on the sun’s position and temperature.
Some shutters were partially closed, others were open.
Temperature on the ground floor: consistently 21°C (70°F). On the upper floor: 22°C (72°F), rising to 24°C (75°F) during peak heat over several hot days.
Musty? No!
So far, we are very satisfied.
Our house is detached. Each side receives sunlight at different times of the day.
Our ventilation system is decentralized and was controlled based on the sun’s position and temperature.
Some shutters were partially closed, others were open.
Temperature on the ground floor: consistently 21°C (70°F). On the upper floor: 22°C (72°F), rising to 24°C (75°F) during peak heat over several hot days.
Musty? No!
So far, we are very satisfied.
Häuslebau3r9 Sep 2015 07:27@EveundGerd Did you add facing bricks or leave it as shown in the picture? Did you use 36cm (14 inches) Ytong blocks, or which type did you use? The thermal values definitely sound very good. But of course, that is also a combination of several factors. Still interesting 🙂
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