ᐅ Are filled or hollow bricks more effective for interior sound insulation?
Created on: 25 May 2022 22:30
U
uk240820
Hello everyone,
We are planning to build a single-family house using hollow bricks with a thickness of 36.5 cm (14.4 inches) (Thermoplan S8). They provide good thermal insulation but are probably less effective for soundproofing compared to similar solid bricks. We live in a rural area on a side street, so external noise is not a major concern.
For the interior walls on the upper floor (bedrooms and children’s rooms), we plan to use bricks with a higher bulk density class (1.2) because sound insulation inside the house is important to us.
However, I keep reading that the exterior wall bricks also affect soundproofing within the house (sound transmission through the exterior walls into the other floor). Is that really the case? I haven’t found any information about this on the manufacturers’ websites.
Does anyone have knowledge or experience regarding this?
I would appreciate any feedback!
We are planning to build a single-family house using hollow bricks with a thickness of 36.5 cm (14.4 inches) (Thermoplan S8). They provide good thermal insulation but are probably less effective for soundproofing compared to similar solid bricks. We live in a rural area on a side street, so external noise is not a major concern.
For the interior walls on the upper floor (bedrooms and children’s rooms), we plan to use bricks with a higher bulk density class (1.2) because sound insulation inside the house is important to us.
However, I keep reading that the exterior wall bricks also affect soundproofing within the house (sound transmission through the exterior walls into the other floor). Is that really the case? I haven’t found any information about this on the manufacturers’ websites.
Does anyone have knowledge or experience regarding this?
I would appreciate any feedback!
H
HoisleBauer2227 May 2022 00:49Here, as a supplement to my previous question, are some “hard facts” from the technical data sheets:
Poroton hollow brick Plan-T 11.5-1.4: 47.5 dB (weighted sound reduction index Rw), density class 1.4
Poroton hollow brick Plan-T 24.0-0.8: 49 dB (weighted sound reduction index Rw), density class 0.65
Poroton T8-24.0-MW (mineral wool): 46.3 dB (weighted sound reduction index Rw), density class 0.65 [Perlite not available at 24 cm (9.4 inches)!]
-> I believe this maximum difference of 2.7 dB is hardly noticeable in everyday use.
However, I wonder: Why is the sound insulation better without mineral wool?
And: Why is the thinner 11.5 cm (4.5 inches) brick classified as “denser” based on density class?
Poroton hollow brick Plan-T 11.5-1.4: 47.5 dB (weighted sound reduction index Rw), density class 1.4
Poroton hollow brick Plan-T 24.0-0.8: 49 dB (weighted sound reduction index Rw), density class 0.65
Poroton T8-24.0-MW (mineral wool): 46.3 dB (weighted sound reduction index Rw), density class 0.65 [Perlite not available at 24 cm (9.4 inches)!]
-> I believe this maximum difference of 2.7 dB is hardly noticeable in everyday use.
However, I wonder: Why is the sound insulation better without mineral wool?
And: Why is the thinner 11.5 cm (4.5 inches) brick classified as “denser” based on density class?
Regarding the interior walls, we haven't had many problems, I can say that. However, I would never use only 11.5cm (4.5 inches) thickness—that's much too thin. We have one wall between the guest toilet and the kitchen, and the difference compared to the others that are 17.5cm (7 inches) thick is literally massive.
Also, be careful: toilet flushes or shower thermostats shouldn’t be placed directly next to, for example, a child's bedroom, as you can hear the flushing. That’s something to avoid.
Also, be careful: toilet flushes or shower thermostats shouldn’t be placed directly next to, for example, a child's bedroom, as you can hear the flushing. That’s something to avoid.
Snowy36 schrieb:
however, I would never go with only 11.5 cm (4.5 inches); that is way too thin … we have one between the guest WC and the kitchen, and the difference compared to the others with 17.5 cm (7 inches) is literally massive.I would probably opt for just 10 cm (4 inches), as a gypsum board.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
HoisleBauer2227 May 2022 14:10Snowy36 schrieb:
However, I would never use just 11.5— that’s way too thin... We have a partition between the guest bathroom and kitchen, and the difference compared to the others that are 17.5 is literally massive.As an addition:Poroton perforated brick Plan-T-17.5-0.8: 46 dB (weighted sound reduction index Rw), bulk density class 0.8
-> That would mean 1.5 dB better sound insulation—can such a difference really be that significant?
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