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?
The advantage I see in the proposed construction is the thickness of the wall.
If you want brick cladding, you inevitably end up with a relatively thick structure. This can be partly offset by the insulating properties of Poroton to keep the insulation layer thinner. That is certainly an option.
Personally, I’m not a fan of Poroton, but that might be due to regional preferences, and I’m put off by images of crumbling bricks. However, that is more a matter of perception.
In general, what would bother me about using Poroton on the outside is the almost inevitable need to use Poroton on the inside as well, since sound insulation becomes an issue at that point. There are plenty of experiences online about mixing it with calcium silicate blocks on the interior…I would avoid doing that.
If you want brick cladding, you inevitably end up with a relatively thick structure. This can be partly offset by the insulating properties of Poroton to keep the insulation layer thinner. That is certainly an option.
Personally, I’m not a fan of Poroton, but that might be due to regional preferences, and I’m put off by images of crumbling bricks. However, that is more a matter of perception.
In general, what would bother me about using Poroton on the outside is the almost inevitable need to use Poroton on the inside as well, since sound insulation becomes an issue at that point. There are plenty of experiences online about mixing it with calcium silicate blocks on the interior…I would avoid doing that.
H
Hausbauer129 May 2018 21:45From my perspective, this construction method does not seem weak in any area and offers very good thermal insulation. However, there are simply no thick layers.
The typical sand-lime brick structure with external thermal insulation composite system (ETICS) and plaster has the major advantages of sound insulation and solidity. On the other hand, you need to add substantial insulation to achieve decent thermal performance. Poroton blocks already provide very good insulation on their own, but are weak in terms of sound insulation and solidity.
A masonry brick veneer wall offers benefits for weather resistance and soundproofing, but it also increases costs, the risk of construction errors, and issues related to combining different materials. Brick slips, on the other hand, are less expensive, have a good appearance, and also provide effective weather protection.
The advantage of these insulated facing bricks seems to be that they are barely more expensive than a pure ETICS or applied brick slips and lead to fewer construction errors. The thermal blocks also appear to me to be a good compromise, combining the strengths and weaknesses of aerated concrete and sand-lime brick. I became immediately interested when I heard about this construction method and thought it sounded quite good and practical.
The typical sand-lime brick structure with external thermal insulation composite system (ETICS) and plaster has the major advantages of sound insulation and solidity. On the other hand, you need to add substantial insulation to achieve decent thermal performance. Poroton blocks already provide very good insulation on their own, but are weak in terms of sound insulation and solidity.
A masonry brick veneer wall offers benefits for weather resistance and soundproofing, but it also increases costs, the risk of construction errors, and issues related to combining different materials. Brick slips, on the other hand, are less expensive, have a good appearance, and also provide effective weather protection.
The advantage of these insulated facing bricks seems to be that they are barely more expensive than a pure ETICS or applied brick slips and lead to fewer construction errors. The thermal blocks also appear to me to be a good compromise, combining the strengths and weaknesses of aerated concrete and sand-lime brick. I became immediately interested when I heard about this construction method and thought it sounded quite good and practical.
16cm (6.3 inches) insulation with a thermal conductivity of 0.032 W/(m·K) is usually sufficient to achieve KfW 55 standards. Adding 17.5cm (6.9 inches) of sand-lime brick results in a total thickness of 33.5cm (13.2 inches). This can only be undershot using aerated concrete / hollow bricks plus external thermal insulation composite systems (ETICS) or wood.
With Poroton used monolithically, 36.5cm (14.4 inches) becomes tight, as you then have insulated blocks, which come at a higher cost.
With Poroton used monolithically, 36.5cm (14.4 inches) becomes tight, as you then have insulated blocks, which come at a higher cost.
K
Knallkörper30 May 2018 23:15Hausbauer1 schrieb:
Poroton already provides very good insulation on its own, but it performs poorly in terms of soundproofing and solidity.It depends on the type of Poroton. A T16, like the one we have, offers poor insulation, is quite heavy and stable, and has good sound insulation. Your description seems to fit aerated concrete more.
These insulating bricks are, in my opinion, a real compromise for new builds and, from a building physics perspective, questionable compared to a traditional brick facade. They are also less durable mechanically, and I see a higher potential for errors during installation. Last but not least: there is no problem with different materials when using a veneer brick wall. With insulated bricks, I see more issues because different materials are bonded together by friction.
H
Hausbauer131 May 2018 10:18Knallkörper schrieb:
It depends on the Poroton. A T16, like the one we have, has poor insulation, is quite heavy and sturdy, and provides good soundproofing. Based on your description, I would rather think of aerated concrete.Yes, YOU are right. I actually meant aerated concrete there, not Poroton.
Hausbauer1 schrieb:
Actually, I meant aerated concrete (also known as cellular concrete) at that point, not clay blocks. However, blood sausage and liver sausage are definitely different ...
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Similar topics