ᐅ Pros and Cons of Insulating Reinforced Concrete vs. Poroton Blocks

As mentioned above, I am interested in understanding the obvious advantages and disadvantages of concrete insulation in this context.

Our builder constructs all exterior walls using reinforced concrete. Since I always assumed that private houses are usually built with Poroton or traditional clay bricks rather than reinforced concrete, I wanted to know if there are any drawbacks to using reinforced concrete.

Here is an excerpt from our building specifications.
The exterior basement walls are made of waterproof, 25cm (10 inches) thick reinforced concrete and are fitted with 8cm (3 inches) of insulation. That is clear.

The exterior walls on the ground and upper floors are made of 25cm (10 inches) and 20cm (8 inches) thick reinforced concrete, respectively, and are provided with 16cm (6 inches) of thermal insulation. The walls facing the street will have a 2cm (0.8 inch) thick scratch render applied.

Isn't that ridiculously expensive? Besides, I wouldn’t want to have to use a rotary hammer every time I want to attach something to the exterior walls. For the electrician, cutting channels and installing boxes would probably also be very time-consuming and costly. Two reinforced concrete interior walls in our new build are already enough for me (for structural reasons)...

€uro schrieb:
If there are doubts, then why choose this general contractor?
Sign first and ask questions later? How does that make sense?

Best regards.

Very high-quality answer. Respect! Do you respond to your clients like that as well?
Who says I have doubts? I was simply interested.

The construction costs are within range.

italiano83 schrieb:
... Do you answer your clients like that as well?....

Yes, because my approach is based on objective truth. I always leave flattery and sales interests to the usual suspects or the uninformed.

Best regards

Then share your opinion on my questions here instead of acting like the pope. If you have no answers on the topic, please let others take the lead.

Dear TE,
If I understand your post correctly, the basement walls and the slab will be constructed using waterproof concrete, which is also called a “white tank.” The alternative would be the “black tank,” meaning a masonry basement that is subsequently sealed against both hydrostatic and non-hydrostatic water pressure.
The white tank is the safer solution. If groundwater is present or if the building is on a slope, I would insist on using waterproof concrete.
Walls made of waterproof concrete should not be drilled into or weakened by chasing channels.