Hello,
I have another question about materials.
The developer stated in the building description that they will use either calcium silicate blocks or Poroton for the walls.
Are these two materials similar in price? (plus insulation for a KfW 60 house). Or is it possible to negotiate a better price for one of the two materials?
Best regards
I have another question about materials.
The developer stated in the building description that they will use either calcium silicate blocks or Poroton for the walls.
Are these two materials similar in price? (plus insulation for a KfW 60 house). Or is it possible to negotiate a better price for one of the two materials?
Best regards
Hello Cmajere, hello Jörg,
It also depends somewhat on the region where you are building. In southern Germany, bricks are more commonly used (Poroton is also a type of brick, where clay granules are mixed with polystyrene beads), while in northern Germany, sand-lime bricks are more common. For building physics reasons, it is advisable to choose one type of masonry for both the exterior walls (or the inner leaf of a cavity wall) and the interior walls.
Bricks generally offer better thermal insulation, while sand-lime bricks have higher compressive strength and mass, resulting in better sound insulation.
By the way, Jörg, the insulation material for an external thermal insulation composite system (ETICS) does not necessarily have to be plastic-based (polystyrene). There are mineral wool systems available, which may cost a bit more but, in my opinion, offer better properties.
It also depends somewhat on the region where you are building. In southern Germany, bricks are more commonly used (Poroton is also a type of brick, where clay granules are mixed with polystyrene beads), while in northern Germany, sand-lime bricks are more common. For building physics reasons, it is advisable to choose one type of masonry for both the exterior walls (or the inner leaf of a cavity wall) and the interior walls.
Bricks generally offer better thermal insulation, while sand-lime bricks have higher compressive strength and mass, resulting in better sound insulation.
By the way, Jörg, the insulation material for an external thermal insulation composite system (ETICS) does not necessarily have to be plastic-based (polystyrene). There are mineral wool systems available, which may cost a bit more but, in my opinion, offer better properties.
Hello Danton,
I know that – but usually the standard is polystyrene, often as Styrofoam or rather Neopor boards. If it needs to be thinner, then also aluminum laminated, etc. From the previous notes on cmajeres’s posts, I concluded that no “more complex” solutions will be installed here.
By now, I know that the ETICS consists of an “insulating render.”
Systems made from softwood fiber would also be possible.
What do you think about the Poroton blocks with zeolite filling? I actually found those quite good during an early planning phase.
I know that – but usually the standard is polystyrene, often as Styrofoam or rather Neopor boards. If it needs to be thinner, then also aluminum laminated, etc. From the previous notes on cmajeres’s posts, I concluded that no “more complex” solutions will be installed here.
By now, I know that the ETICS consists of an “insulating render.”
Systems made from softwood fiber would also be possible.
What do you think about the Poroton blocks with zeolite filling? I actually found those quite good during an early planning phase.
Hello,
does this stone not crumble when cutting it (if you only need half a stone)?
Or when drilling a hole to hang something, does the filling not come loose?
How should the insulating plaster be understood? Is some kind of wool applied onto the bare calcium silicate brick, followed by the insulating plaster? That way, there would be no suction or cold bridges?
does this stone not crumble when cutting it (if you only need half a stone)?
Or when drilling a hole to hang something, does the filling not come loose?
How should the insulating plaster be understood? Is some kind of wool applied onto the bare calcium silicate brick, followed by the insulating plaster? That way, there would be no suction or cold bridges?
In the beginning, there were apparently problems when the blocks were stored wet, meaning they were exposed to damp weather. Similar to aerated concrete, which also crumbles quickly when moist.
However, this is said to no longer be an issue after improvements have been made.
I’m not familiar with thermal insulation plasters, but I think the mineral wool serves as a base for adhesion for the relatively thick plaster layer.
However, this is said to no longer be an issue after improvements have been made.
I’m not familiar with thermal insulation plasters, but I think the mineral wool serves as a base for adhesion for the relatively thick plaster layer.
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