Hello,
I am currently looking into wall construction for a single-family house. What are the advantages of bricks filled with perlite or mineral wool compared to unfilled bricks?
In the datasheets from Wienerberger and Schlagmann, for example, the T8 bricks with and without filling have the same U-value at the same wall thickness.
So why do filled bricks even exist? Is it only for sound insulation?
Regards, barcardi
I am currently looking into wall construction for a single-family house. What are the advantages of bricks filled with perlite or mineral wool compared to unfilled bricks?
In the datasheets from Wienerberger and Schlagmann, for example, the T8 bricks with and without filling have the same U-value at the same wall thickness.
So why do filled bricks even exist? Is it only for sound insulation?
Regards, barcardi
No advantages – only disadvantages.
I discussed this topic in detail with our architect. He said that filled bricks don’t have any benefits because they have the same properties as regular ones. But they do have a major drawback: if you cut or drill into the bricks, the filling leaks out, leaving you with an unfilled or only partially filled brick, which results in worse performance. Another downside is the higher cost for basically nothing. We have unfilled T9 bricks.
I discussed this topic in detail with our architect. He said that filled bricks don’t have any benefits because they have the same properties as regular ones. But they do have a major drawback: if you cut or drill into the bricks, the filling leaks out, leaving you with an unfilled or only partially filled brick, which results in worse performance. Another downside is the higher cost for basically nothing. We have unfilled T9 bricks.
B
Bauexperte28 Dec 2014 23:51Good evening,
I am surprised by your architect’s statement, as it is not entirely accurate.
It is true that unfilled hollow bricks have caught up in terms of thermal insulation; however, it is also true that sound insulation is a major advantage of the filled bricks. That is why this type of brick is often used in multi-story residential buildings.
The main difference between unfilled and filled hollow bricks is the thinner webs in the unfilled ones; these bricks—with a thermal conductivity of 0.08 W/mK—are less compressive-resistant and therefore structurally less strong due to their thin webs.
Regards, Bauexperte
Manu1976 schrieb:
No advantages – only disadvantages.
I discussed this topic with our architect. He said that filled bricks have no advantage because they have the same values. But they have a big disadvantage: if you cut or drill the bricks, the filling falls out and you end up with an unfilled or only partially filled brick with correspondingly worse properties. Another disadvantage is the higher price for basically nothing. We have unfilled T9 bricks.
I am surprised by your architect’s statement, as it is not entirely accurate.
It is true that unfilled hollow bricks have caught up in terms of thermal insulation; however, it is also true that sound insulation is a major advantage of the filled bricks. That is why this type of brick is often used in multi-story residential buildings.
The main difference between unfilled and filled hollow bricks is the thinner webs in the unfilled ones; these bricks—with a thermal conductivity of 0.08 W/mK—are less compressive-resistant and therefore structurally less strong due to their thin webs.
Regards, Bauexperte
The point about structural engineering and thinner ribs is correct, of course. He mentioned this as well, but in the case of single-family houses, this is usually negligible—unless you are building in areas with high noise levels. Sound insulation was not important for us either, but so far, I cannot complain about a lack of soundproofing. Our "old" prefab house is noticeably worse when it comes to outside noise.
schubert7929 Dec 2014 21:18We use hollow bricks with insulation fill. They were only slightly more expensive. When drilling or hammering nails into the wall, nothing crumbles out.
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