ᐅ Wall to utility room made of calcium silicate blocks?

Hello,

since we will not have a basement, the utility room (with gas heating, mechanical ventilation, washing machine, and dryer) will be located on the ground floor. Does it make sense to build the wall for this room out of sand-lime bricks instead of clay bricks? Sand-lime bricks are said to provide much better sound insulation, but I’ve also read that different types of masonry units should not be mixed. Or is there another solution?

Best regards
Sabine

Make the walls thicker and especially ensure that the door is properly installed. Otherwise, even the thickest wall won’t be effective.

Let’s put it this way:
Between our bathroom and the bedroom, there is a walk-in closet (without a door to the bedroom) and drywall. When someone is showering in the bathroom, you can hear it very clearly in the bedroom.

Our utility room has solid sand-lime brick walls, and we installed a soundproof door (nothing special, basically an entry-level soundproofing door). I think that makes a big difference. Especially since the mechanical ventilation system is not very quiet, but you can’t hear it outside the utility room.

Ask about the interior plaster, as it contributes significantly to sound insulation (just by being there). Here, only very thin plaster/spackle was applied, which I didn’t know beforehand.

So my recommendation: solid walls and a soundproof door.

How many hinges does the door have – is it a special frame?
Although we have calcium silicate brick walls, you can still hear the humming from the heat pump outside.

We had the door frames for the utility room (heat pump) and the bathroom (washing machine/dryer) made from solid chipboard with sound insulation. We also asked the installer to foam the entire frame, not just spot-fill it. This made a significant difference without requiring much extra effort.

toxicmolotow schrieb:
?..That brought a noticeable improvement without much extra effort.

Compared to what?
Our hallway to the living area is open, without a door or wall. No preventive soundproofing measures were installed on the ground floor.
The walls in the hallway and adjacent areas are made of Poroton blocks, 11.5cm (4.5 inches) thick.
There is nothing audible from the utility room (corner room between hallway and kitchen). The only noise is from our refrigerator humming—or when the door is opened. Oh, and also just a standard, regular door.
Heating and controlled residential ventilation are installed in the utility room…

Regards