ᐅ Order of Renovation for a Single-Family Home

Hello,

we have purchased a semi-detached house built in 1980 with an oil heating system from 2014 and are planning the following renovations.
Does the sequence of renovation work make sense to you?
Would you keep the oil heating system?

Balcony railing (the old one is too low, so this is first for safety reasons)
Remove 2 non-load-bearing walls
Install new walls
Underfloor heating and solar panels on the roof
Windows and doors
New flooring
Bathroom
Kitchen
Possibly insulate the basement ceiling (depending on the recommendation of the energy consultant for the KFW energy-efficient house standard)
Wood-burning stove
Balcony floor

Neubau2020 schrieb:

Does the sequence of renovation tasks make sense to you?

Sounds like a full renovation. Everything is happening at once. If you’re installing underfloor heating and removing walls, it will look like a shell anyway. So walls in/out, underfloor heating, bathrooms, windows, and balcony all at the same time. Meanwhile, a new heating system could be installed – depending on your goal (energy-efficient house?).
You can insulate the basement ceiling yourself in between (I would always do this – it has a huge impact if you don’t need to heat the basement).
What does “solar on the roof” mean? Photovoltaic or solar thermal? The first is good; I would recommend avoiding the latter.

I don’t know the property, but a typical balcony would simply be removed in my experience. It’s rarely or never used anyway if there’s a nicer garden.

What does the energy consultant say about further energy measures? Roof insulation or external wall insulation? Then you’re almost at a new build. Additionally, the question is whether the electrical system should also be renewed or extended if you’re already gutting the place.

Yes, if possible, just get rid of the balcony. Unless it is made of wood, it is a real energy efficiency and low-energy house killer. Do you still need external wall insulation for the low-energy house?

I am not a fan of exterior wall insulation due to the tremendous costs.
We just want to see if we can reach an efficiency level with new windows and doors and insulation of the basement ceiling. The roof is insulated with glass wool. If that is not enough for the efficiency level, then so be it, the individual measures will be submitted to BAFA instead of KfW.

Why not consider solar thermal systems as a supplement to the oil heating?

Neubau2020 schrieb:

I’m not a fan of external wall insulation because of the high costs.

... says someone doing a full structural renovation. High costs are a myth. And if you can get up to 40% of that funded, it’s definitely worth considering.

Neubau2020 schrieb:

Why not use solar thermal as a supplement to the oil heating system?

Because solar thermal systems (regardless of the heating system they supplement) produce hot water mainly in summer. But so much that you can’t really use it all. In winter at least you can enjoy the view of the panels on the roof if they don’t contribute anything else. Is it worth the investment just for a few showers during the sunny period? No...
Photovoltaics aren’t great in winter either, but in sunshine you can at least sell the electricity you generate. That is almost always worthwhile.

Well, can that really be said so generally?
From April 1, 2021, there is still 7.81 cents per kWh of electricity, as long as there is any surplus after self-consumption.
For the installation of solar thermal systems, the Bafa still covers 30% of the investment costs.