Hello to all interested readers,
For about half a year now, my wife and I have been planning our new home. We have found a nice plot of land and have also decided on the building style (Ytong kit house). Initial contact with the company has been made.
Now the first draft from their architect has arrived, and we find it far from satisfactory.
Our goal is a KfW 40+ house on a slope, with a slight incline of about 3m (10 feet) over the first 5m (16 feet) in depth, then another 2m (7 feet) incline over the remaining 30m (98 feet) of depth.
- Front side facing southwest
- Lower floor planned as a full story, possibly to be converted into an apartment later. At the moment, it will be used as a guest room and office
- Roof of the office = terrace
Garage as an attached structure with a flat roof.
I’ve attached some pictures. The draft itself was created with MeinHeim3D V3. Unfortunately, I can’t upload that here. I also have plans in PDF if that helps.
The architect says that our draft is unfavorable because of the protruding office and the garage. This would be bad from an energy perspective.
Now I am under the impression that with good insulation, a lot can be achieved and that with KfW 40+ the final energy value counts, so I can compensate for some losses in the building envelope by the technology used.
Am I seeing this wrong?
For about half a year now, my wife and I have been planning our new home. We have found a nice plot of land and have also decided on the building style (Ytong kit house). Initial contact with the company has been made.
Now the first draft from their architect has arrived, and we find it far from satisfactory.
Our goal is a KfW 40+ house on a slope, with a slight incline of about 3m (10 feet) over the first 5m (16 feet) in depth, then another 2m (7 feet) incline over the remaining 30m (98 feet) of depth.
- Front side facing southwest
- Lower floor planned as a full story, possibly to be converted into an apartment later. At the moment, it will be used as a guest room and office
- Roof of the office = terrace
Garage as an attached structure with a flat roof.
I’ve attached some pictures. The draft itself was created with MeinHeim3D V3. Unfortunately, I can’t upload that here. I also have plans in PDF if that helps.
The architect says that our draft is unfavorable because of the protruding office and the garage. This would be bad from an energy perspective.
Now I am under the impression that with good insulation, a lot can be achieved and that with KfW 40+ the final energy value counts, so I can compensate for some losses in the building envelope by the technology used.
Am I seeing this wrong?
reeneex schrieb:
slight slope of about 3m (10 feet) over the first 5m (16 feet) in depth, then a further 2m (7 feet) slope over the remaining 30m (98 feet) in depth. But there would have to be one side placed into the slope, right? Also, a site plan with a north arrow and one or two elevation points would be helpful.
Unfortunately, a few exterior views don’t really help either.
By the way, roof terraces on extensions are not without challenges; this needs careful planning to ensure, for example, that access points to the roof terrace do not have unnecessarily high parapets.
It might be advisable to consult an architect first, and only then decide who will build the house and how.
Good morning and thank you for the quick replies.
At the moment, I am generally interested in opinions regarding the KfW40+ standard, rather than the exact details.
@Tomtom: The text says, "The design itself was made with MeinHeim3D V3," which should answer your question. The rest of your input unfortunately isn’t helpful.
@kbt09: Thanks for the pointers. I’m not very familiar with the program but will try to incorporate the suggestions. As I said, my main focus right now is clarifying the KfW40+ details.
To be more precise:
- The main building is positioned with the front embedded into the slope, shown in the first and second images.
- The garage, on the right side of the second image, will be attached.
- The office, on the left side of the second image, is intended to be the base for the terrace.
- The main building is dug into the slope, which is why there are no windows on the lower part of the front side, visible in the first two images.
Both floors will be fully heated. Now the architect says that the office section would be "very complex and expensive" to build, due to the many exposed surfaces and the open roof.
I believe that with additional insulation on the walls and the correct terrace construction, this shouldn’t be a problem or too costly.
Am I mistaken? The overall goal is to meet the KfW40+ standard. I assume I can compensate in other areas, for example with a larger photovoltaic system, to earn points back. Right?
At the moment, I am generally interested in opinions regarding the KfW40+ standard, rather than the exact details.
@Tomtom: The text says, "The design itself was made with MeinHeim3D V3," which should answer your question. The rest of your input unfortunately isn’t helpful.
@kbt09: Thanks for the pointers. I’m not very familiar with the program but will try to incorporate the suggestions. As I said, my main focus right now is clarifying the KfW40+ details.
To be more precise:
- The main building is positioned with the front embedded into the slope, shown in the first and second images.
- The garage, on the right side of the second image, will be attached.
- The office, on the left side of the second image, is intended to be the base for the terrace.
- The main building is dug into the slope, which is why there are no windows on the lower part of the front side, visible in the first two images.
Both floors will be fully heated. Now the architect says that the office section would be "very complex and expensive" to build, due to the many exposed surfaces and the open roof.
I believe that with additional insulation on the walls and the correct terrace construction, this shouldn’t be a problem or too costly.
Am I mistaken? The overall goal is to meet the KfW40+ standard. I assume I can compensate in other areas, for example with a larger photovoltaic system, to earn points back. Right?
reeneex schrieb:
Now we have received the first draft from their architect, and we find it far from satisfactory.
The design itself was made using MeinHeim3D V3. Unfortunately, I cannot upload it here.
The architect says that our design is unfavorable because of the projecting office and the garage. According to them, this would be poor from an energy efficiency perspective.
I am under the impression that with insulation you can achieve a lot and that for KfW 40+ the final performance value is what matters, so I can compensate for some issues in the building structure through the technical systems.
Am I mistaken?
Oh, you drew it yourself? That explains a lot. Because from your text, it wasn’t clear that you just slapped it together.
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