Hello everyone,
I’d like to briefly introduce our house project here. The goal is to exchange ideas with you on various topics and possibly create specific threads for detailed subtopics. Since we haven’t signed any contract yet and only have two initial rough quotes, I can’t provide details like heating load calculations at this stage. Thanks for your understanding.
Now for the first rough plan:
- Single-family house with about 170-180m² (1830-1940 sq ft) living space
- Bungalow
- Only the ground floor will be occupied
- Geothermal heating with 2 boreholes, each 80m (260 ft) deep, and a Nibe S1255 unit
- Floor slab insulation with glass gravel
- 36.5cm (14 inches) exterior walls made of Ytong masonry units
- Ceiling insulation using Ytong ceiling elements (maybe too expensive!?)
- Household of 2 people (likely to increase to 4)
- Decentralized ventilation (I’m not very satisfied with ReglerAir window units)
- Photovoltaic system on the roof, 7-10 kWp, without battery storage
- Triple-glazed PVC windows
I would appreciate your initial assessment and feedback.
Budget: Moderate, two incomes; total costs for the complete house (excluding furniture and kitchen) should not exceed 400,000 euros.
I will provide more information later.
Best regards and thanks for your feedback!
Peter
I’d like to briefly introduce our house project here. The goal is to exchange ideas with you on various topics and possibly create specific threads for detailed subtopics. Since we haven’t signed any contract yet and only have two initial rough quotes, I can’t provide details like heating load calculations at this stage. Thanks for your understanding.
Now for the first rough plan:
- Single-family house with about 170-180m² (1830-1940 sq ft) living space
- Bungalow
- Only the ground floor will be occupied
- Geothermal heating with 2 boreholes, each 80m (260 ft) deep, and a Nibe S1255 unit
- Floor slab insulation with glass gravel
- 36.5cm (14 inches) exterior walls made of Ytong masonry units
- Ceiling insulation using Ytong ceiling elements (maybe too expensive!?)
- Household of 2 people (likely to increase to 4)
- Decentralized ventilation (I’m not very satisfied with ReglerAir window units)
- Photovoltaic system on the roof, 7-10 kWp, without battery storage
- Triple-glazed PVC windows
I would appreciate your initial assessment and feedback.
Budget: Moderate, two incomes; total costs for the complete house (excluding furniture and kitchen) should not exceed 400,000 euros.
I will provide more information later.
Best regards and thanks for your feedback!
Peter
B
boxandroof26 Jan 2020 01:31Improving the roof insulation is relatively inexpensive. Mineral wool provides better insulation than aerated concrete. It’s not worth it otherwise. A concrete ceiling naturally costs extra. So, just have the house designed to a standard level; the providers know the most cost-effective ways and may offer different approaches that you can review and compare. If you reach KfW standards, you will receive the subsidy. However, the house itself will not be noticeably different or better because of this.
Don’t focus too much on the insulation. Planning everything else is more important: floor plan, electrical system, ventilation, heating, shading, the photovoltaic system, and so on. It’s worth investing effort in all of these areas, sometimes even in detail.
Don’t focus too much on the insulation. Planning everything else is more important: floor plan, electrical system, ventilation, heating, shading, the photovoltaic system, and so on. It’s worth investing effort in all of these areas, sometimes even in detail.
N
nordbayer26 Jan 2020 08:09If you want to do something good for the environment and your budget, avoid overhangs, bay windows, flat roofs, special shapes, etc. as much as reasonably possible, and build simple, square, practical basic structures. It’s better to have a few more windows instead. Although it may look less exciting, it results in fewer thermal bridges, fewer construction defects, and in the long run fewer potential sources of problems of any kind...
- Do not build to a subsidy standard.
- Use the materials that the preferred general contractor (GC) applies as their standard.
- Choose a GC whose standard house meets the desired energy standard. Anything else will become unnecessarily expensive.
- Insulation
Nabu provides a list of alternative insulation materials, and if you search for polystyrene disposal Fraunhofer, you will see that there are some developments in this area.
- Decentralized ventilation offers no advantages for me. Either central ventilation or trickle vents in the window frame.
- Use the materials that the preferred general contractor (GC) applies as their standard.
- Choose a GC whose standard house meets the desired energy standard. Anything else will become unnecessarily expensive.
- Insulation
Nabu provides a list of alternative insulation materials, and if you search for polystyrene disposal Fraunhofer, you will see that there are some developments in this area.
- Decentralized ventilation offers no advantages for me. Either central ventilation or trickle vents in the window frame.
N
nordbayer26 Jan 2020 09:28PeterS90 schrieb:
Deep geothermal energy 2x 80m (260 feet) and Nibe S1255Are you an environmental activist? If not, an air-to-water heat pump or a horizontal ground loop collector is usually much cheaper, and in terms of heating efficiency, the difference isn’t that significant. Subsidies from BAFA are also possible for both options with some adjustments.Or do you live in a very cold area, for example above 600m (2,000 feet) elevation?
Edit: You mentioned Brandenburg; I believe there isn’t a single location in the whole state where an expensive borehole would make financial sense. What does the climate map from the German Heat Pump Association say regarding the standard outdoor temperature?
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nordbayer26 Jan 2020 09:32haydee schrieb:
- Don’t build to a standard just to get the subsidyBasically correct, but with KfW55 standard, a certain additional investment can now actually be financially worthwhile. The new subsidy rates have indeed become very attractive.nordbayer schrieb:
Basically correct, but with KfW55, a certain additional investment might now even be financially worthwhile. The new subsidy rates have indeed become very attractive. Could be true. It also depends on the general contractor. Choosing a standard just for the sake of subsidies, no matter what, doesn't make sense.
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