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
montessalet11 Sep 2018 09:25rick2018 schrieb:
Hello montessalet,
I won’t disclose exact costs for obvious reasons.
Now to the dimensions.
Our pool is 20 meters long and 3.42 meters wide (wider than shown in the illustration). It has an increased water depth and will be an (infinity) overflow pool along the entire 20 meters.
Stainless steel is, as you correctly said, the luxury option.
Just the cover for this length is expensive, and with polycarbonate you can almost double the price.
Sealed with a liner, complete pool technology, cover made only from PVC, no overflow pool, and WITHOUT all the concrete work, it would already be close to six figures.
Ours will cost more than twice that.
Depending on what and how much you can do yourself, it will be cheaper. Also, our pool dimensions are certainly not average.
A "normal" sized pool with good technology can be realized for well under 50k.
With steel wall pools, etc., it can be even cheaper. However, that is not comparable.
The next point is whether and how you want to heat it...
Is your drainage system sufficient to handle the backwashed water? (usually about 1m3 in 2–3 minutes)
If you have further questions, just ask.
Regards Thanks for the info. I already knew your pool is "a bit bigger"..... However, in my opinion, the costs for a "normal" pool of around 8 by 3 meters are still well over 20,000 euros. In a new build (e.g., if the garden needs landscaping anyway), mostly only the pool costs matter.
The whole style of your house only really works at a certain scale: I mean that the aesthetics come together as a whole — a "smaller version" would lose a lot of character. I’m curious to see a photo when your project is finished....
rick2018 schrieb:
Hello Alex, we thought about this for a long time.
In the end, we decided against using fan coils or similar systems.
There is also an additional split unit that precools the intake air. The air is also guided about 40 meters (130 feet) underground beforehand.
Cooling with air is always a less effective choice and only really makes sense starting at an air exchange rate of 4. But we don’t want an interior temperature of 18°C (64°F) when it is 30°C (86°F) outside. We are more focused on buffering temperature peaks.
Due to the massive construction, shading, and partially covering the glass surfaces, it should work out.The solar gain is really impressive. It’s not just about 18°C (64°F), but about overheating throughout the day. Automated shading certainly helps with this.
The airflow of a ventilation system is simply too low to effectively counteract this, even if the supply air is precooled.
An HVAC system doesn’t necessarily need indoor split units; convectors can also be integrated into the floor, for example.
Or cooling can be done through the ceiling without convectors, which is also possible.
I would have real concerns about the amount of glazing, probably facing south.
Regarding photovoltaics... the elevations seem to lack an adequately high parapet. You don’t want to spoil the appearance of the house with elevated panels, do you?
Our entire development is being built with flat roofs, and there’s a regulation that you must not be able to see from below what is installed on top. Some of the first houses have already violated this. Elevated photovoltaic panels, satellite dishes... it looks really bad. Seriously.
@kaho674 I prefer not to share exact costs because you never know who might overhear. Not because of you, but so that people around me (workers, neighbors, etc.) don’t find out how much I’ve spent on my house.
If there are specific questions, I’m happy to answer them via private message.
Your estimate is unfortunately not sufficient.
Of course, I’ve also browsed the forum and found some expensive builds.
I hesitated for a while about joining, but I feel I owe it to the community since I have benefited from you all. And usually, such builds are not shared...
@montessalet Between $20,000-$50,000 is realistic for an 8x3 meter (26x10 feet) pool, depending on how much work you do yourself. If you really want, you could also consider a steel wall pool.
Construction won’t start for a while yet. We’re still waiting for the building permit/planning permission. The shell construction contract hasn’t been awarded yet. I’ll post pictures from time to time.
The new drone is supposed to be delivered today, so aerial photos will be possible.
The lot is also large enough that I don’t have to fly over the neighbors.
If there are specific questions, I’m happy to answer them via private message.
Your estimate is unfortunately not sufficient.
Of course, I’ve also browsed the forum and found some expensive builds.
I hesitated for a while about joining, but I feel I owe it to the community since I have benefited from you all. And usually, such builds are not shared...
@montessalet Between $20,000-$50,000 is realistic for an 8x3 meter (26x10 feet) pool, depending on how much work you do yourself. If you really want, you could also consider a steel wall pool.
Construction won’t start for a while yet. We’re still waiting for the building permit/planning permission. The shell construction contract hasn’t been awarded yet. I’ll post pictures from time to time.
The new drone is supposed to be delivered today, so aerial photos will be possible.
The lot is also large enough that I don’t have to fly over the neighbors.
Alex85 schrieb:
The solar gain is really intense. It’s not just about 18 degrees Celsius (64°F), but rather all-day overheating. Automation of shading definitely helps with this.
The airflow volume of ventilation is just too low to effectively counteract it, even if the supply air is pre-cooled.
You don’t necessarily need split air conditioning units inside; you can also install convectors in the floor and similar solutions.
Or you can cool via the ceiling without convectors, which also works.
I would really have concerns about the amount of glazing, probably facing south.Hello Alex,
I understand your concerns.
However, it is thermal insulation glass even though it is clear glass.
Shading is automated as you mentioned.
From an air exchange rate of 4, you can cool by ventilation. We have this in some rooms. I’m not talking about standard exchange rates around 0.3 or so.
In addition to our HVAC provider (about 500 employees), I brought a specialized company on board.
Cooling from the floor is out of the question. My wife always has cold feet anyway, and there is the dew point issue...
Ceilings and walls would be possible. But we have a lot of exposed concrete.
We also considered a cooling ceiling in the bedroom. We didn’t like it, but we have planned a retrofit option with power supply.
Photovoltaics won’t be visible from below. The parapet will be constructed accordingly. Don’t forget the hillside location. From the street, you cannot even see the upper floor let alone the ground floor (due to the garage). From the other side of the valley on the hill, you will always be able to see the photovoltaics—possibly with binoculars.
We have no building permit / planning permission, only §34.
S
Steffen8011 Sep 2018 09:57Hello
really great project! If we were to build again, I would also choose to build only with concrete! Truly impressive! In our street, there are several “estates” of this size. I also know one of them regarding costs (since it's from our architect as well) and I can tell you: forget about 2 million. I estimate at least 3.5 million... but easily closer to 4 or 5. It also depends a lot on the interior finish. When building like this, it’s common to install a kitchen costing $100k to $200k. That’s no problem.
really great project! If we were to build again, I would also choose to build only with concrete! Truly impressive! In our street, there are several “estates” of this size. I also know one of them regarding costs (since it's from our architect as well) and I can tell you: forget about 2 million. I estimate at least 3.5 million... but easily closer to 4 or 5. It also depends a lot on the interior finish. When building like this, it’s common to install a kitchen costing $100k to $200k. That’s no problem.
Similar topics