Plan brick or brick filled with wood fibers

2021-01-28 20:00:09

Hello, we are currently considering which ones are better now. Some construction companies advise against the filled ones. Out of fear of mold formation ??? We would not be able to achieve a Kfw 40+ house just because of the bricks. Can you share your experiences with us? Thank you

2021-01-28 20:11:43

Both are not ideal. Unfilled is really crap, even though it is still often done.

Take perlite-filled or mineral wool-filled. There you have the best properties.

Alternatively KS plus ETICS.

2021-01-28 20:40:44

Depending on the filling, no water should enter the brick during construction, i.e., it should not rain in. And the filling sometimes seems to slip downwards, which undermines the purpose of the filling.

If it "only lies on the wall," recalculating might help. We initially planned only for KfW55, but with the photovoltaics on the 40cm Ytong, we match so well that for KfW40 only a little more insulation on the floor slab is needed. In practice, this will probably make little difference, but the photovoltaics were already set, and this way we get the storage properly subsidized.

2021-01-28 21:08:53

Depending on the filling, no water should get into the brick during construction, i.e. it must not rain in. And the filling sometimes seems to slip downwards, which undermines the purpose of the filling.

If it "just lies on the wall," recalculating might help. Initially, we only planned for KfW55, but with the photovoltaics and the 40cm Ytong, we are doing so well that for KfW40 only a little more insulation on the base plate is needed. In practice, this will probably not make much difference, but the photovoltaics were set anyway, so we get the storage system properly subsidized.

Our energy consultant says something different than the energy consultant at the brick factory yesterday. According to the brick factory, the wood does not absorb moisture!? That was also my fear with moisture and slipping downwards.

2021-01-28 21:09:57

Both are not ideal. Unfilled is really crap, even though it is still often done. Take perlite-filled or mineral wool-filled. You get the best properties there. Alternatively KS plus ETICS.

What is wrong with the wood fibers?

2021-01-28 21:36:55

Basically nothing, I am a big fan of wood fibers. However, I would have concerns because of moisture. With perlite, you don't miss anything, since it is hydrophobized.

Besides, wood fiber in bricks has not been tested for long, perlite has been around for a very long time with extremely good experience.

Perlite is stone and stone in stone is more appealing to me.

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Plan brick or brick filled with wood fibers

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