Timber panel construction - exterior wall thickness = 10 cm sufficient?

Despite 1980, I still assume a wall thickness of 30 cm here (monolithic), and to me, the whole thing looks very much like an elevated flat-roof bungalow. I can hardly believe in a total wall thickness of 10 cm, especially not because of the roof, which needs to be supported. The previous owner may be demented, but the building authority is not - the file knows more.

Despite 1980, I still assume 30 cm wall thickness here (monolithic), and to me, the whole thing looks very much like a raised flat roof bungalow. I can hardly believe in 10 cm total wall thickness, especially because of the roof, which needs to be supported. The previous owner might be demented, but the building authority is not – the file knows more.

Thank you for your answer!
Yes, you are absolutely right, it was previously a flat roof. The gable roof was added on top. The windows and front door are fine.

In the following photo, you can somewhat see the exterior wall width of the timber panel construction



Here are some details from the expert:

Partially renovated/modernized:
- Roof renewed in 2012 with bitumen sheets
- Windows and front door were renewed
- Heating boiler incl.
hot water boiler was renewed
- Both bathrooms were renovated.
- Water installations: central water supply via connection to the public drinking water network
- Wastewater installations: disposal into municipal sewer system
- Electrical installation: basic equipment from 1980
- Heating: gas central heating, piping (on wall) and radiators from 1980
- Hot water supply: central via heating
- Floor coverings: laminate, linoleum, tiles and textiles
- Wall coverings: wallpaper or tiles in the sanitary area
- Ceiling coverings: wallpaper and panels
- Windows: on ground floor: aluminum windows with double glazing + shutters; on upper floor: plastic double-glazed windows
- Interior doors: simple flush doors
- Sanitary installation: bathroom with shower on upper floor, bathroom with tub on ground floor
- Kitchen equipment: not included
- Garage with electric roller door

Building construction (basement, walls, ceilings, stairs, roof):
- Construction type: prefabricated timber construction (frame) / timber panel construction (prefabricated elements)
- Foundations: strip foundation
- Basement: masonry
- Exterior walls: timber (frame) + gypsum board on both sides + insulation layer inside (wall thickness about 0.10 m)
- Stairs: steel frame + wooden steps
- Entrance area: entrance door made of aluminum with window section, entrance with canopy
- Roof construction: wooden roof, plank trusses as cold roof
- Roof type: gable roof
- Roof covering: bitumen roofing sheets

Minimum purchase price: 125,000 our budget is 200,000

That looks more like a 20-25cm wall.

But where can you get such beautiful houses for this price?

The realtor said that she probably just left the heating running.

Nothing more than a stupid comment. It only reinforces the prejudices against his profession. You are on the right track. When inquiring about insulation, consider that old houses newly insulated tend to develop mold. Then it is said, "They just didn't ventilate enough." Not every building fabric is suitable for that.

Nothing more than a dumb saying. It reinforces the prejudices of his guild. You are on the right track. When inquiring about insulation, consider that old houses with new insulation often develop mold. Then it is said, "They just didn't ventilate enough." Not every building fabric is suitable for this.

Hmm, so in your opinion, I shouldn't insulate because otherwise I risk mold?

I'm a bit confused right now.
What would you do best?

Is such a house even worth it if you only have about €60,000 for renovation? (Still inexperienced)

I am far from giving a blanket recommendation. The important thing is simply to know that the building is also suitable for insulation, that was my point. Therefore, do not only consult a [Dämm-Experten], because they do not necessarily have this in mind or have no interest in it.