ᐅ Thermal bricks / Poroton and insulated facing bricks – Is this the optimal solution?
Created on: 8 May 2018 23:05
H
Hausbauer1
A colleague of mine is planning to have his house built soon using thermal bricks/Poroton combined with insulated facing bricks. Since discussions about wall constructions here often become almost like a religion, I wanted to open this up for discussion to see whether this might be a good solution.
The thermal insulation of this combination is said to be excellent. It is also supposed to be a solid choice regarding soundproofing, protection against summer heat, costs, vulnerability to construction defects, weather resistance, and appearance. But doesn’t everyone say that about their preferred system?
The thermal insulation of this combination is said to be excellent. It is also supposed to be a solid choice regarding soundproofing, protection against summer heat, costs, vulnerability to construction defects, weather resistance, and appearance. But doesn’t everyone say that about their preferred system?
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Hausbauer131 May 2018 17:2211ant schrieb:
Blood sausage and liver sausage are quite different ...Yes, that's true, but sometimes people accidentally write Poroton instead of aerated concrete. They sound similar after all. Especially since I later referred to thermal bricks (Poroton) and praised them as a good compromise between aerated concrete and sand-lime bricks.
Hausbauer1 schrieb:
I referred to insulated clay blocks (Poroton) and praised them as a good compromise between aerated concrete and sand-lime brick. When I think of "insulated clay blocks," I specifically mean the filled porous brick. And there really isn’t a "good compromise" between aerated concrete and sand-lime brick, as both camps strictly adhere to their "pure doctrine."
I hardly see aerated concrete and porous bricks as comparable: aerated concrete is produced as a homogeneous block of artificial stone foam, while porous bricks have a chambered profile. There is a lot of difference here, and consequently little basis for ecumenism.
Sand-lime brick follows more the building pattern of a solid "brick," possibly with a grip hole, and is therefore a whole reformational step more "Catholic" than the other two. Perhaps that is why it is best trusted to handle the noise problem.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
Hausbauer11 Jun 2018 20:47From my perspective, differences in manufacturing are rather irrelevant. The main focus should be on the advantages and disadvantages a specific wall construction offers in terms of important properties:
- Insulation (cold protection)
- Heat protection
- Soundproofing
- Solidness / safety
- Cost
- Durability (wind, weather, etc.)
- Appearance
- Risk of construction defects
Since aerated concrete naturally provides good insulation but weak soundproofing, and sand-lime brick offers good soundproofing but poor insulation, the thermal brick tends to be a compromise between the two. It performs better than sand-lime brick in terms of insulation and better than aerated concrete regarding soundproofing and solidness.
- Insulation (cold protection)
- Heat protection
- Soundproofing
- Solidness / safety
- Cost
- Durability (wind, weather, etc.)
- Appearance
- Risk of construction defects
Since aerated concrete naturally provides good insulation but weak soundproofing, and sand-lime brick offers good soundproofing but poor insulation, the thermal brick tends to be a compromise between the two. It performs better than sand-lime brick in terms of insulation and better than aerated concrete regarding soundproofing and solidness.
Hausbauer1 schrieb:
From my point of view, differences in manufacturing are rather irrelevant. But that’s only from your point of view, because this is not a lesser manufacturing process like that of apples and pears.
A homogeneous foam on one hand and a chambered profile on the other lead to an unfair comparison.
Hausbauer1 schrieb:
Since aerated concrete naturally It does not naturally, since it is synthetic.
Hausbauer1 schrieb:
offers good insulation and weak soundproofing I cannot confirm that at all regarding soundproofing, neither in residential nor in commercial buildings.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Lightweight building materials with air inclusions have good insulation values. Materials with high density provide good sound insulation.
For comparison, typical exterior walls:
Calcium silicate brick RDK 1.8, 175mm (7 inches), has U-value = 2.88 with 315 kg/m² (64.6 lbs/ft²)
Ytong W PP 1.6-30, 365mm (14 inches), has U-value = 0.211 with 110 kg/m² (22.5 lbs/ft²)
Poroton T8, 365mm (14 inches), has U-value = 0.211 with 219 kg/m² (44.9 lbs/ft²)
Calcium silicate bricks have poor insulation. Therefore, they are combined with insulation materials in "functional walls," or however you want to call them. Supporters describe this as "the best of both worlds."
Ytong and Poroton are processed monolithically, at least the variants given in the examples. Poroton has a significantly higher weight at the same insulation level and is therefore, in my opinion, better than Ytong.
But: Money, money, money! Our house would have been about €40,000 more expensive using Poroton, based on a price estimate, so that option was quickly dismissed. The only advantage, supposedly a lower risk of algae growth, is purely a cosmetic issue and can be prevented for decades for much less than €40,000. Also, the KfW 55 wall assembly with calcium silicate brick plus external thermal insulation composite system (ETICS) was thinner, resulting in space gain, and I wanted calcium silicate brick on the interior walls anyway. So it made sense to stick to one building material.
So, among all the properties of a wall assembly, thermal insulation (and required wall thickness = space gain), soundproofing, and cost are really important to me.
Other properties come second or I don’t care about them at all (for example, the so-called indoor climate that all manufacturers claim to be especially great).
For comparison, typical exterior walls:
Calcium silicate brick RDK 1.8, 175mm (7 inches), has U-value = 2.88 with 315 kg/m² (64.6 lbs/ft²)
Ytong W PP 1.6-30, 365mm (14 inches), has U-value = 0.211 with 110 kg/m² (22.5 lbs/ft²)
Poroton T8, 365mm (14 inches), has U-value = 0.211 with 219 kg/m² (44.9 lbs/ft²)
Calcium silicate bricks have poor insulation. Therefore, they are combined with insulation materials in "functional walls," or however you want to call them. Supporters describe this as "the best of both worlds."
Ytong and Poroton are processed monolithically, at least the variants given in the examples. Poroton has a significantly higher weight at the same insulation level and is therefore, in my opinion, better than Ytong.
But: Money, money, money! Our house would have been about €40,000 more expensive using Poroton, based on a price estimate, so that option was quickly dismissed. The only advantage, supposedly a lower risk of algae growth, is purely a cosmetic issue and can be prevented for decades for much less than €40,000. Also, the KfW 55 wall assembly with calcium silicate brick plus external thermal insulation composite system (ETICS) was thinner, resulting in space gain, and I wanted calcium silicate brick on the interior walls anyway. So it made sense to stick to one building material.
So, among all the properties of a wall assembly, thermal insulation (and required wall thickness = space gain), soundproofing, and cost are really important to me.
Other properties come second or I don’t care about them at all (for example, the so-called indoor climate that all manufacturers claim to be especially great).
K
Knallkörper1 Jun 2018 23:04The ideal wall structure for me would be: sand-lime brick – mineral wool – facing brick. Essentially, a cross-section separated by function, where the sand-lime brick provides an acceptable overall thickness and is perfect for fastenings. Our general contractor does not offer this, so the load-bearing wall is made of 24cm (9.5 inches) Poroton. We have substantial window sills. Sound insulation and thermal insulation are excellent.
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