ᐅ Lightweight concrete with infill? The dilemma of choosing the right masonry system
Created on: 31 Mar 2019 12:12
K
Kevinius
Hello,
we are planning to build a new single-family house and are currently in the selection phase regarding the type of block.
Our current favorite is the Liapor SL Plus with a thickness of 36.5 cm (14.4 inches).
However, since this block is not commonly used in our area (Saarland), our research so far has shown that it is sold at a relatively high price and that few masons have experience working with it.
Some masons / construction managers have also advised against blocks with filler, as they are said to be less or not at all vapor permeable, which could cause moisture to move from the filler inward over time, resulting in stains on plaster or wallpaper. This seems rather far-fetched to me?!
Besides thermal insulation, we also place great importance on soundproofing, but we definitely want to build monolithically—so no external thermal insulation composite systems (ETICS) / external wall insulation.
What other options do we have in this regard?
Aerated concrete seems to be ruled out.
Clay blocks (Poroton) are probably problematic when it comes to drilling holes and fixing things.
We would very much appreciate any suggestions on this topic.
Best regards
we are planning to build a new single-family house and are currently in the selection phase regarding the type of block.
Our current favorite is the Liapor SL Plus with a thickness of 36.5 cm (14.4 inches).
However, since this block is not commonly used in our area (Saarland), our research so far has shown that it is sold at a relatively high price and that few masons have experience working with it.
Some masons / construction managers have also advised against blocks with filler, as they are said to be less or not at all vapor permeable, which could cause moisture to move from the filler inward over time, resulting in stains on plaster or wallpaper. This seems rather far-fetched to me?!
Besides thermal insulation, we also place great importance on soundproofing, but we definitely want to build monolithically—so no external thermal insulation composite systems (ETICS) / external wall insulation.
What other options do we have in this regard?
Aerated concrete seems to be ruled out.
Clay blocks (Poroton) are probably problematic when it comes to drilling holes and fixing things.
We would very much appreciate any suggestions on this topic.
Best regards
Kevinius schrieb:
and are currently in the process of deciding regarding the type of masonry. I would strongly reply with a firm "never" when I think about your main thread.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Aerated concrete W PP 2-0.35 (lambda 0.08) at 365mm (14 inches) weighs 128kg/m² (26.3 lbs/ft²)
Poroton T8 unfilled at 365mm (14 inches) weighs 219kg/m² (45 lbs/ft²)
Calcium silicate brick RDK 1.8 at 175mm (7 inches) weighs 315kg/m² (65 lbs/ft²)
Just to get an idea of the relative weight.
Poroton T8 unfilled at 365mm (14 inches) weighs 219kg/m² (45 lbs/ft²)
Calcium silicate brick RDK 1.8 at 175mm (7 inches) weighs 315kg/m² (65 lbs/ft²)
Just to get an idea of the relative weight.
Tego12 schrieb:
If sound insulation is your main priority, you either need to build a double-shell wall with calcium silicate blocks or use calcium silicate blocks combined with external thermal insulation composite systems (ETICS). Monolithic walls do not provide good sound insulation at standard thicknesses.
The question is whether you actually need "good" sound insulation. Is there an airport or railway nearby?The house is located in a 30 km/h (about 20 mph) zone – traffic during the day is moderate. At night, there is virtually no traffic (only residents). We have no airport or railway tracks nearby.
11ant schrieb:
I strongly disagree and say “never,” especially considering your main thread.Apparently, our orientation was not well received, okay. I can understand that, but it is what WE want.
What exactly is technically wrong with the design? Please explain your concerns objectively.
The Liapor/Liaplan product we have chosen has the following technical specifications:
Strength class 2
Bulk density 500 kg/m³ (31.3 lb/ft³)
Thermal conductivity (Lambda) 0.08 W/(m·K)
U-value 0.20 W/(m²·K)
Weighted sound reduction index (Rw) 50 dB
We are in seismic zone 0.
To me, the material sounds excellent, without any real disadvantages.
Maybe I have overlooked something...
Regards,
Kevin
Kevinius schrieb:
Maybe I missed something …Yes.
The main weak point for "sound insulation" against outside noise is always the windows, not the wall layers or their bricks....
Kevinius schrieb:
What exactly is technically wrong with the design? Please provide a factual explanation. That is what I and others have done, over twelve pages.
Kevinius schrieb:
Maybe I missed something ... No, you just don’t want to listen.
Between the front door/garage door on one side and the rear garage door/terrace on the other, the ground level rises by about 140 to 150 cm (55 to 59 inches). Assuming a level garage floor, the soil would reach up to your chin at the rear garage door. You can never remove all that earth without causing your neighbor’s rainwater to flow into your courtyard.
You simply lack the ability to imagine why your building plan is not feasible. I already pointed out that the elevation measurements are not some random numbers drawn for fun on the cadastral map.
You probably have the naive assumption that a retaining wall placed like a guillotine in front of your neighbor’s soil on your boundary line would solve this. But in that case, it’s the neighbor’s responsibility to secure it against the earth pressure from the slope :-(
Take another look at your main thread – you will see that it’s not just my personal opinion that this won’t work and can’t be fixed like that.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/