ᐅ Interior walls made of Poroton or calcium silicate bricks?

Hello everyone,

I am getting 36.5cm (14.4 inches) Poroton for the exterior walls. My architect recommends using Poroton for the interior walls as well. However, he can’t really explain the reasoning behind this suggestion. It would be cheaper, though.
I was leaning more towards calcium silicate blocks (no special anchors needed, better sound insulation). What are your thoughts?
Are you in favor of Poroton or calcium silicate blocks? Is calcium silicate really more expensive?

It is said that using different materials for interior and exterior walls causes cracks due to their differing expansion behavior.

It is also said that sand-lime brick and aerated concrete can be combined, but Poroton performs better on its own.

I have not verified this.
What is more cost-effective likely depends on the region.

What is meant by the special anchor?

Regarding Poroton presence

For hollow clay bricks, types with a long expansion range, known as frame anchors, are particularly suitable. These anchors are secured over several ribs inside the brick, ensuring a firm hold.
When very heavy items such as awnings, canopies, toilets, and washbasins need to be supported, special chemical anchors are usually used.

Alessandro schrieb:

What is meant by the special anchor?

Since Poroton is relatively soft and has thin internal webs, I would have concerns about mounting an 85-inch TV on a 17.5cm (7-inch) interior wall. This makes special anchors necessary. With calcium silicate bricks, I wouldn’t worry about it.

Soundproofing can be considered a valid argument, but anchors? What exactly do you plan to hang on the wall? Even if you actually need "special anchors," the quantities are usually not that large. By the way, an 85-inch TV does not weigh 50 kg (110 lbs) and is mounted with more than one screw...