ᐅ Hollow bricks and soundproofing – looking for experiences
Created on: 20 Apr 2020 16:21
U
unser_schloss
Hello,
we are planning to build our house using unfilled Unipor bricks. Since the plot is in a quiet location, we had no concerns about sound insulation so far. However, a construction company advised me against this because internal noise could also be a problem.
Does anyone have a house built with unfilled bricks? If yes, which bricks and what thermal insulation value do they have? Are there any issues with sound insulation?
Thank you very much!
we are planning to build our house using unfilled Unipor bricks. Since the plot is in a quiet location, we had no concerns about sound insulation so far. However, a construction company advised me against this because internal noise could also be a problem.
Does anyone have a house built with unfilled bricks? If yes, which bricks and what thermal insulation value do they have? Are there any issues with sound insulation?
Thank you very much!
Snowy36 schrieb:
We have these bricks, and next time I would definitely choose sand-lime bricks for the interior walls and use insulated outer bricks... for example, filled with mineral wool... but it depends on how sensitive you are, and it also costs money; for just insulated outer bricks, our general contractor wanted 7,000 euros... so TV really isn't a problem, not even with a home theater. And sound definitely doesn’t transfer through the outer wall... but you'll still hear the teenager’s music. If you decide on standard interior bricks, be careful especially in the bathrooms that the walls are thick enough, and if possible, avoid routing the pipes for toilets etc. adjacent to the child’s room... otherwise, you’ll wake the little one.
With a 24cm (9.5 inches) wall and insulated pipes, even with bricks, it’s all fine.
But the overall concept is important... if you have CPL doors inside or windows with poor sound insulation, you haven’t really gained anything... everything has to work together. We have 11.5cm (4.5 inches) bricks between the bathroom and bedroom with plaster on both sides. The sink is mounted on that wall. Unfortunately, you can hear everything in the next room. Is it possible to reinforce the wall with drywall on both sides to reduce sound transmission?
This was about a similar topic... Only a few days old
https://www.hausbau-forum.de/threads/11-5er-wand-tragend-verblenden-schimmel.39836/#post-511245
https://www.hausbau-forum.de/threads/11-5er-wand-tragend-verblenden-schimmel.39836/#post-511245
O
Oetzberger16 Jul 2021 20:41As some have already mentioned, sound insulation is definitely not a strong point of these bricks. Practical experience with Unipor U08 36.5cm (14.4 inches) hollow plan bricks, unfilled, used as exterior walls:
- Soundproofing to the outside is poor. We live in a quiet area and have rather poorly sound-insulated windows, so the exterior wall’s insulation is not that critical. However, one room has no window facing the neighbors, and if someone talks loudly about 5 meters (16 feet) away from the house, you can hear every word inside. The sound definitely passes through the wall. Certain frequencies, like those from a drill, transmit through the wall with very little attenuation. For those living quietly, this may not be an issue at all. But on a busy street or similar, these bricks would be a big mistake.
- Soundproofing between floors is nearly perfect, thanks to the reinforced concrete ceiling and good decoupling. You have to actually go to the stairs to call someone upstairs.
- Soundproofing between rooms is acceptable—not perfect, but much more noise passes through our hollow core plank doors than through the 12.5cm (5 inches) walls. For walls where sound insulation is important, the 17cm (6.7 inches) or 24cm (9.4 inches) interior bricks should be used.
- As others have pointed out: we paid close attention to soundproofing in the floor plan. No children’s room or bathroom next to the bedroom. Generally, no wall with water pipes next to a room that requires quiet. No bathroom or toilet adjacent to the office. And a (mostly open) glass door from the hallway to the living room, instead of an open floor plan. A concrete staircase, so I don’t wake the “elephant” at night. Last but not least, an L-shaped staircase that effectively separates the ground floor from the upper floor in terms of sound.
Would I choose these bricks again? Since I didn’t want an external insulation system and was not convinced by filling, that left hollow bricks as the only option. So yes, I would do it the same way again.
- Soundproofing to the outside is poor. We live in a quiet area and have rather poorly sound-insulated windows, so the exterior wall’s insulation is not that critical. However, one room has no window facing the neighbors, and if someone talks loudly about 5 meters (16 feet) away from the house, you can hear every word inside. The sound definitely passes through the wall. Certain frequencies, like those from a drill, transmit through the wall with very little attenuation. For those living quietly, this may not be an issue at all. But on a busy street or similar, these bricks would be a big mistake.
- Soundproofing between floors is nearly perfect, thanks to the reinforced concrete ceiling and good decoupling. You have to actually go to the stairs to call someone upstairs.
- Soundproofing between rooms is acceptable—not perfect, but much more noise passes through our hollow core plank doors than through the 12.5cm (5 inches) walls. For walls where sound insulation is important, the 17cm (6.7 inches) or 24cm (9.4 inches) interior bricks should be used.
- As others have pointed out: we paid close attention to soundproofing in the floor plan. No children’s room or bathroom next to the bedroom. Generally, no wall with water pipes next to a room that requires quiet. No bathroom or toilet adjacent to the office. And a (mostly open) glass door from the hallway to the living room, instead of an open floor plan. A concrete staircase, so I don’t wake the “elephant” at night. Last but not least, an L-shaped staircase that effectively separates the ground floor from the upper floor in terms of sound.
Would I choose these bricks again? Since I didn’t want an external insulation system and was not convinced by filling, that left hollow bricks as the only option. So yes, I would do it the same way again.
Oetzberger schrieb:
- Interior insulation between floors is almost perfect thanks to the reinforced concrete slab and good decoupling. You actually have to go to the stairs to call up. That puzzles me a lot. Since sound hits the wall on the upper floor and then travels to adjoining rooms through the brickwork. The same happens from the upper floor to the ground floor. The reinforced concrete slab must be interrupted because of thermal bridging. Nowadays, usually a half-brick cavity with insulation wool and concrete is used. Sound passes through the insulation wool.
Personally, I am just as bothered by longitudinal sound in houses with bricks. That’s also why it’s prohibited in multi-family houses, which have floor slabs or similar structural elements 🙂
O
Oetzberger16 Jul 2021 22:04So then, something was probably not executed completely correctly in your case. Or in your permafrost climate, a permanent layer of ice forms on the outside of the bricks, which provides the coupling ;-)
As mentioned, from inside to outside very poor, to the adjacent room just about acceptable, and to the room above on the next floor excellent sound insulation.
As mentioned, from inside to outside very poor, to the adjacent room just about acceptable, and to the room above on the next floor excellent sound insulation.
Similar topics