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
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
Back from the architect.
I don’t want to hijack your thread, but I find the discussion on “cooling through controlled ventilation” very interesting, as it is also a topic for us. Therefore, I would appreciate any experiences from you @rick2018 and @Steffen80. Our architect summarized the topic as follows: it is possible and works, but don’t expect miracles. More details are supposed to come from a joint appointment with a heating, ventilation, and air conditioning specialist.
I don’t want to hijack your thread, but I find the discussion on “cooling through controlled ventilation” very interesting, as it is also a topic for us. Therefore, I would appreciate any experiences from you @rick2018 and @Steffen80. Our architect summarized the topic as follows: it is possible and works, but don’t expect miracles. More details are supposed to come from a joint appointment with a heating, ventilation, and air conditioning specialist.
@Jenpa forget about reversible cooling through controlled ventilation systems. It only provides a small buffering effect, nothing more.
If it doesn’t cost much, include the module with the controlled ventilation, but don’t expect air conditioning.
The standard air exchange rates are far too low (0.1–0.4 per hour) to have a significant impact. The air also won’t be truly cool. To cool by air exchange, you need rates that are ten times higher than those of standard controlled ventilation systems.
The same applies to reversible heat pumps and cooling through underfloor heating systems.
Proper air conditioning only makes sense with high air exchange rates (split units, fan coils…) or via walls and/or ceilings.
If it doesn’t cost much, include the module with the controlled ventilation, but don’t expect air conditioning.
The standard air exchange rates are far too low (0.1–0.4 per hour) to have a significant impact. The air also won’t be truly cool. To cool by air exchange, you need rates that are ten times higher than those of standard controlled ventilation systems.
The same applies to reversible heat pumps and cooling through underfloor heating systems.
Proper air conditioning only makes sense with high air exchange rates (split units, fan coils…) or via walls and/or ceilings.
guckuck2 schrieb:
200m3/h (118 cubic feet per minute) with 1200m3 (42,390 cubic feet) of ventilated volume is low, @Steffen80.
Is there a specific reason for this?
The airflow rate is well below the minimum required for proper ventilation.Probably poor planning of supply and exhaust air, which causes drafts even at such a low air exchange rate.
S
Steffen806 Jul 2019 22:08There are no drafts in our home, even at a maximum ventilation rate of 500 m³/h (295 cfm). We simply don’t need that much airflow. I measure VOC levels in every living space, and usually, 200 m³/h (118 cfm) is enough to keep the concentration at 500-600 ppm.
We have a separate air conditioning system that cools the entire house! I would definitely do that again. Worth every penny. If I want, I can cool the whole place down to 18°C (64°F) even without a mechanical ventilation system or cold floors.
We have a separate air conditioning system that cools the entire house! I would definitely do that again. Worth every penny. If I want, I can cool the whole place down to 18°C (64°F) even without a mechanical ventilation system or cold floors.
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