ᐅ Modernist Concrete Villa with Cavity Wall Insulation – Experiences

Created on: 11 Sep 2018 07:32
R
rick2018
Hello everyone,

I just wanted to briefly introduce myself and say thank you.

For about a year and a half, I have been a silent reader here to gather inspiration and especially to gain more knowledge about construction technology.

Now a bit about me:
After more than a year of searching for a plot of land, I was able to purchase one from a developer who couldn’t move forward quickly with his plans.
So we found our dream plot (good location, 2500 m² (0.62 acres), slight slope, underground private spring that we have to preserve and are allowed to use).
There was an old house on the property, which we have since demolished.
There is no zoning plan, so §34 applies. During an initial informal inquiry at the building authority, almost everything we planned was rejected.
So we submitted an official preliminary building inquiry, involved the right people, and had lengthy discussions. In the end, we received a positive decision.
Therefore, there is nothing standing in the way of the building permit. The building permit should be granted within the next few weeks as there are no changes from the preliminary inquiry.

My wife (37) and I (36) want to build a Bauhaus-style villa in southern Baden-Württemberg.
It will be constructed from concrete (with core insulation) or in combination with insulated precast elements.
A lot of glass (full-glass system), textile shading, KNX, fast network both wired and wireless, strong mechanical ventilation with additional cooling coils, stainless steel pool, large cistern, and more.
The electrical planning must be 100% spot on since it’s almost impossible to make changes afterward.
Since I am friends with an architect from a larger firm, it was clear which route we would take. Such a house can basically only be realized with an architect.
I also personally know the electrician and KNX system integrator, as well as the owners and work approach of the heating, plumbing, and ventilation companies involved.
Some trades have already been contracted, and part of the equipment has already been ordered.

I’m really looking forward to getting started and to the final result. The goal is to move in by the end of 2019.

Once again, many thanks for the information I have received from you so far.
If you have any questions, just let me know.

Attached is the design, though not the final version. There have been a few minor changes.

Greetings from Swabia

Modern villa with flat roofs, terraces, glass surfaces, green surroundings – several views.
rick20183 Jan 2022 09:50
I can't tell you the exact alloy from memory. But it sounds like your underfloor heating specialist has no knowledge or experience with mastic asphalt. That's why they want to go with a traditional approach. Get a specialist involved, and then there won’t be any problems.

Please keep in mind that anything in contact with mastic asphalt must withstand at least 250°C (480°F). Grinding produces a lot of dust even when suction is used. So, above all, do other work first and then protect the floor...
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Rumbi441
3 Jan 2022 10:21
Thank you. Quick question. What do you mean by "So above all, do it first and then protect the floor..."?
Tolentino3 Jan 2022 10:26
Usually, it is preferable to build the ceiling and walls before the floor, as this means the floor does not need to be protected as extensively. However, at 250°C (482°F), some paints and wallpapers could have issues...
rick20183 Jan 2022 10:34
Under no circumstances should the floor be sanded after applying filler, painting, etc. When using the machines, you must sand right up to the edge. There will always be some marks. The dust tends to stick to the wall paint even if the area is covered with plastic sheets. Floor-to-ceiling windows should also not be installed yet due to the heat.

In terms of planning and process, poured asphalt is considerably more complex than traditional methods.
R
Rumbi441
3 Jan 2022 10:37
Thank you. May I ask one more question: What is underneath your poured asphalt and the FHB?
rick20183 Jan 2022 10:41
A layer of insulating material was applied to level and cover the surface. It consists of small beads. I don’t have the exact term for it.

This will then be covered, and the underfloor heating will be installed on top. In the case of screed asphalt, the installation spacing is different (larger) because it conducts heat very well, is highly flexible, and the underfloor heating is located within the final floor covering.

Therefore, it is essential to hire a specialist who is experienced with this type of installation.