ᐅ Building a House with TuC and Modifications – Your Thoughts?
Created on: 11 Apr 2019 21:52
D
derkobi
Hello construction experts and enthusiasts, I have been reading along for a while and now I need some advice.
We want to build with TuC here in Saxony, postal code area 02.
The companies that build for TuC here have a good reputation and there is a lot of building activity at the moment.
Most people simply build an affordable house, called Standard eco Baustein 1. Unfortunately, posting links is not allowed. We want to make a few small changes if they make sense.
We would like to increase the exterior wall thickness from 24cm (9.5 inches) to 36.5cm (14 inches), using aerated concrete from Porit in monolithic construction.
The additional cost is about 7,300€ (the foundation slab will also be larger to maintain the living space). The rest will be adjusted to the stronger walls – roof, windowsills, etc.
If worthwhile, we would replace the gas condensing boiler with an air-to-water heat pump (Vaillant aroTherm Split vwl 75/5) with Unitower vwl 78/5 IS.
Additional cost: 6,000€.
Underfloor heating throughout the house.
The house model is Flair 125, where 125 stands for the square meters.
One and a half stories.
What are your thoughts on this?
Kind regards,
Kobi
We want to build with TuC here in Saxony, postal code area 02.
The companies that build for TuC here have a good reputation and there is a lot of building activity at the moment.
Most people simply build an affordable house, called Standard eco Baustein 1. Unfortunately, posting links is not allowed. We want to make a few small changes if they make sense.
We would like to increase the exterior wall thickness from 24cm (9.5 inches) to 36.5cm (14 inches), using aerated concrete from Porit in monolithic construction.
The additional cost is about 7,300€ (the foundation slab will also be larger to maintain the living space). The rest will be adjusted to the stronger walls – roof, windowsills, etc.
If worthwhile, we would replace the gas condensing boiler with an air-to-water heat pump (Vaillant aroTherm Split vwl 75/5) with Unitower vwl 78/5 IS.
Additional cost: 6,000€.
Underfloor heating throughout the house.
The house model is Flair 125, where 125 stands for the square meters.
One and a half stories.
What are your thoughts on this?
Kind regards,
Kobi
I would not pay 7000€ for a different wall that does not provide any energy efficiency benefits. This item increases the construction cost by 56€/sqm, just to put it into perspective.
Typically, Town & Country uses aerated concrete plus an insulation layer for the thinnest possible exterior wall.
The heat pump will only be cost-effective if you are betting on rising gas prices. Or is the upgrade to underfloor heating included in the additional cost? If so, go for it.
Typically, Town & Country uses aerated concrete plus an insulation layer for the thinnest possible exterior wall.
The heat pump will only be cost-effective if you are betting on rising gas prices. Or is the upgrade to underfloor heating included in the additional cost? If so, go for it.
Hello,
I think the €80 refers to the heating and consumption costs since I asked what the heat pump costs approximately per month. Otherwise, I will have to ask the question again during the meeting.
The 24cm (9.5 inches) walls would also have been monolithic and somehow meet the required standard.
The underfloor heating is not connected to the main heating system and has an extra charge since standard includes radiators.
Regards, Kobi
I think the €80 refers to the heating and consumption costs since I asked what the heat pump costs approximately per month. Otherwise, I will have to ask the question again during the meeting.
The 24cm (9.5 inches) walls would also have been monolithic and somehow meet the required standard.
The underfloor heating is not connected to the main heating system and has an extra charge since standard includes radiators.
Regards, Kobi
This is just a side note... but I’m curious about the tricks used to get 24 cm (10 inches) Porith walls, monolithic plaster, radiators, and gas heating to comply with the energy saving regulations (building permit / planning permission). That said, in practice, this is sufficient for a decent house. K.
I also had to choose between an air-to-water heat pump and gas. After researching the price ratio of gas kWh to electricity kWh, which is 1:4.4 in our city, the decision was clear for me. It is not cost-effective in the long run, as this performance ratio is unlikely to be achieved on an annual average (probably not even in operating costs, let alone the initial investment), and the electricity is not generated from renewable sources either.
Nordlys schrieb:
This is just a side note... but I’d like to know what tricks people use to get a 24cm (9.5 inch) Porith wall with monolithic plaster, radiators, and gas heating to meet the energy saving regulations... although in practice, that’s enough for a decent house. K. Solar thermal systems and controlled ventilation with heat recovery are also part of the standard.
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