ᐅ Solid Construction House: Which Type of Brick or Block?

Hans_Meier schrieb:


It should be noted that hollow bricks need to contain a significantly higher proportion of foamed air to achieve the same level of thermal insulation. Therefore, the choice was made for a brick filled with mineral wool, specifically the Unipor Coriso W08. This brick has the bulk density of a 10cm (4 inch) brick and additionally offers significantly better sound insulation (45 dB instead of 42 dB), which should not be overlooked. So even in the unlikely event that the mineral wool inside the brick settles over time, you still have a W10 (equivalent to T10) brick, which still provides decent thermal insulation.

I’m not sure how it’s viewed in this forum to revive an old thread. But since the thread title still fits and before I create a new one, I want to address my question with this quote right away.

Does the insulation material (insulation wool) in the Unipor Coriso actually settle over time?
If yes, does the same happen with the Poroton brick competitor’s insulation material (Poroton)?

As far as I know, there are only two major players for classic bricks with insulation:
a) Poroton as insulation material in POROTON bricks
b) Mineral wool as insulation material in Unipor bricks
Or am I missing one?

ludwig88sta schrieb:

I’m not sure how it’s viewed here in the forum to revive an old thread.

Almost there, you only took 2nd place with nine years and one month. The winner is https://www.hausbau-forum.de/threads/blockbohlenhaus.2053/#post-361998 with ten years and one day!

ludwig88sta schrieb:

For traditional bricks, there are only two major players:
a) Poroton as the insulation material in POROTON
b) Mineral wool as the insulation in Unipor
or have I missed one?

Porous bricks, regardless of the manufacturer—and I have no idea which suppliers have proprietary formulas and which produce under license—are generally not “traditional” bricks: traditional bricks would be solid bricks without air voids, usually in smaller sizes. These still exist but only for special applications (e.g., load-bearing pillars, lintel supports, and similar); otherwise, they are no longer used as wall construction material in new buildings.

ludwig88sta schrieb:

Does the insulation material (insulation wool) in Unipor Coriso really settle over time?

I can’t answer this specifically for a single product. In general, though, I find it hard to imagine physically: loose-fill insulation might settle over time, but I believe dense insulation wool would settle only very slightly—there is also the spring stiffness of the air column and not to forget the considerable “long-stroke” effect of the chambers. I’m not a fan of these layered sandwiches, but in general, I don’t take seriously the usual exaggerated claims when comparing properties of individual building materials. Such discussions are often full of oversimplified physics until the doctor arrives.

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The opposite is true. Mineral wool settles, perlite does not.

guckuck2 schrieb:

The exact opposite is true. Mineral wool compresses, perlite does not.

Have you ever cut open a wall after a few years and noticed that?

face26 schrieb:

Have you ever cut open a wall after a few years and confirmed that?

Have you ever cut open a wall and proven the opposite?
Did I claim that mineral wool collapses inside masonry? No, I didn’t. I was responding to 11ant’s physical principle, which is simply incorrect.

Mineral wool does compress when wet. You can find this stated in every installation guideline for such products. Whether masonry regularly suffers from such damage, we cannot know here. However, the physical characteristic exists, unlike with perlite, so 11ant’s statement is wrong.

You didn’t quote or refer to anything, so the original poster will likely interpret your statement as a response to their question; hence my counter-question.

I believe this discussion is greatly overrated, whether these "damages" occur or not. Apart from the claim itself, I have never read or heard of any actual damage. Nor have I ever come across a case where a solid brick was used in construction and, after several years, rising heating costs could be attributed to poorly insulating walls… but even there, I cannot prove the opposite.
When discussing the choice of masonry materials, it’s important to keep things in perspective. If someone has specific requirements, then the properties may differ in detail. For the homeowner without special demands who simply wants a “reasonable” house built, the choice should depend more on cost-effectiveness, local factors, and above all, the builder’s expertise.

…but of course, we can also point the original poster to the breathability and vapor permeability of different materials to confuse them even more.