ᐅ Wall thickness for children’s bedroom / bathroom

Good evening,

has anyone had experience with how wall thickness affects sound transmission?

Currently, the shower is planned directly adjacent to the wall of the children's room. In the children's room, a wardrobe is planned along the wall facing the bathroom (a desk is drawn here for now; the children's room window will be moved so the wardrobe fits against the wall). At the moment, a 17.5cm (7 inch) thick masonry wall is planned. If a 10cm (4 inch) masonry wall would be sufficient without making the children's room too noisy, we could reallocate those 7.5cm (3 inch) to increase the shower size. Any experiences?

It looks more like an 11.5 cm (4.5 inches) wall – or what thickness are the interior walls to the hallway supposed to have?

More important than the thickness is the information about the type of brick or block you have.

They are hollow clay bricks. I’m not sure about the exact millimeter measurement. I just remember approximately 20cm (8 inches) and approximately 10cm (4 inches).

We built with Ytong blocks, and in my opinion, a wall thickness of 17.5 cm (7 inches) is essential for the bathroom. We also have a wardrobe spanning the entire width of that wall.

In hindsight, we should have built a 17.5 cm (7 inch) or even better, a 24 cm (9.5 inch) wall between the teen room and the bedroom. Skype chats or swearing during online games in the middle of the night initially caused several arguments. We didn’t notice this until we moved into the new house because our kids had their own floor.

The best wall construction usually doesn’t help much because the doors are not good quality – very few people pay attention to that.

However, Ytong is a poor choice for interior walls when it comes to sound insulation.

We have a 23cm (9 inches) sand-lime brick wall between the bedroom and bathroom – mainly because of the built-in mirrored cabinet.

Decent doors cost money, and that's where most people tend to save.