Partition wall terraced house

Hello Kai,

Ok, now it is clear to me. Then I expect a much lower price for a similar wall area. What should be expected is only the material surcharge for the 6cm insulation boards, or what do you think? Are the insulation boards really more expensive than the usual soundproofing boards, sorry to ask again?

If a 17.5cm aerated concrete wall was planned from the beginning, in my opinion only an additional charge for the ETICS including synthetic resin plaster should be invoiced.

I don’t understand what you mean by "soundproofing boards," usually the ETICS serves for thermal insulation and not soundproofing; therefore, there should be no price difference here.

Kind regards (have to go to an appointment now)

Hello,
by soundproof panels I mean the panels that are usually installed between houses when a neighbor is also building their house. In my opinion, these panels should already be included in the calculation of a terraced house.
On our left side, where the neighbor is currently missing, the 6cm ETICS plus plaster will then be applied to the 17.5cm calcium silicate brick wall, as already discussed above. Therefore, the builder saves the 2cm panel that would normally be installed, and in my opinion, this should then be deducted from the surcharge of the ETICS. Especially since these are even more expensive than the 6cm insulation boards, based on what I found on the internet.
But maybe someone can add something to this!?

Good evening Kai,

…by soundproofing panels I mean the panels that are usually installed between houses when a neighbor is also building their house. In my opinion, these panels should already be included in the calculation of a terraced house.

Only your builder can answer this question for you – I do not know his calculation.

On our left side, where the neighbor is currently missing, the 6cm ETICS plus plaster will be applied to the 17.5cm calcium silicate stone wall, as already discussed above. Therefore, the builder saves the 2cm panel that would normally be installed, and in my opinion, that should be deducted from the surcharge for the ETICS.

Simply put: today’s semi-detached houses have 2 separate partition walls (party walls) with insulation – air – insulation in between; just ask your builder how the additional costs break down – maybe he has already deducted the cost of the usual insulation – if this was calculated in advance.

Kind regards

Hello Kai

What material are the front and back sides of the terraced houses made of? Are they all the same length, starting and ending exactly in line? Or are they, as is often the case, slightly offset?

Hello, the terraced houses are all individually planned/built. They are not from a developer. Therefore, the depth is not predetermined, but the house edge where the house must begin is defined (5m from the edge of the sidewalk). We stand just under one meter higher compared to the right neighbor. Here we then have to insulate additionally, I think your question referred to that, right? The front and back sides are therefore certainly executed differently depending on the design. For us, a 36.5 cm Poroton wall without additional insulation is planned so far.

Right.. my question referred to the wall offsets at the lateral boundaries. If there as well, in order to achieve a continuous internal wall edge, the KS wall should continue further (i.e. also over the projecting or recessed boundary walls to the neighbors), then the insulation is of course by far not sufficient there. If the insulation increase is on the outer wall side, you have to build over the boundary to the neighbor.. this must also be permitted and documented. If you were to use the Poroton brick, the wall thicknesses along the boundary walls would not match accordingly. So there would be offsets... and if these cannot be concealed by internal partition walls.. then unfortunately it looks very poor. In addition, according to current thermal protection requirements, it would have to be a relatively good Poroton brick in order to meet the requirements with 36.5 cm. Furthermore, there is the problem that you do not know when the neighbor will connect to the insulated KS wall. The 6 cm thermal insulation is naturally too little.. also the transition between the wall with external insulation and the Poroton wall (if with normal lightweight plaster) would need to be clarified, as this does not fit together very well.