High additional costs in old buildings - despite renovation

It is quite important to me to own an environmentally friendly and of course also cost-saving house. I have already invested 250,000 euros in this property and have always chosen the best (the best in terms of hopefully a long lifespan). In addition, I am certainly willing to take further steps towards environmental protection. However, it must be noted that after this amount of investment, the momentum is somewhat lost at first. This month, the basement windows will also be replaced with new ones. The costs for an energy consultant are probably not in proportion to a new roof or new windows. I will certainly be able to bear these costs again at a soon time.

I am attaching a picture showing the gap between the masonry and the brick facade. I took this picture when the roof was being renewed.


I will consult an energy advisor in some time and I greatly appreciate your help! Of course, I am also looking forward to further suggestions.

PS: Today I ordered 4000 liters of heating oil. The costs amount to about 3500 euros. I am curious how many such purchases will still follow.

Hello padersee,

we also have a bungalow from 1968. Two years ago we had an energy assessment done. It costs about 700€, with part of it at that time being covered by the BFA or something similar. However, the result showed that there is no huge loss, or the loss cannot be attributed to just one component. Currently we need about 2000 liters of oil per year for 130m² on the ground floor. On the ground floor we have 30cm KS stone walls, above that only an insulated flat roof with a concrete ceiling.

After the assessment, we only replaced the heating system with a modern oil condensing boiler.

New windows would save about 14%, insulation of the exterior wall about 15%. Insulation of the basement ceiling about 5%.

Therefore, we have so far refrained from taking further measures because it simply does not pay off. When the insulation of the exterior wall only pays off after 30 years, these are my thoughts. We will only proceed to insulate the basement ceiling. You can do that well yourself, it is cost-effective and makes a difference.

Of course, you must not forget that a 170m² bungalow also has a huge building envelope.

I would have an energy assessment done, then you will know exactly where savings are still possible. However, I do not think you will get below 2000 liters of oil per year without substantial effort.

Best regards and good luck