Hello,
I have a split-level house built in 1970.
The walls on the ground level are regular stud walls with some type of board mounted on them.
In the split-level part, I have identified three types of walls. Either studded walls with the same board as on the ground level or concrete walls. No problems there.
But then there are some walls made of some kind of concrete-like material. But it's not a problem to drill into these walls with a battery-powered screwdriver and a regular wood drill bit, even though the bit becomes dull.
Is this what is called lightweight concrete or what could it be?
I intend to mount a bathroom cabinet on this type of wall and even though it's light when empty, I have a feeling my dear partner
will fill it with heavy creams and other necessary contents
I have a split-level house built in 1970.
The walls on the ground level are regular stud walls with some type of board mounted on them.
In the split-level part, I have identified three types of walls. Either studded walls with the same board as on the ground level or concrete walls. No problems there.
But then there are some walls made of some kind of concrete-like material. But it's not a problem to drill into these walls with a battery-powered screwdriver and a regular wood drill bit, even though the bit becomes dull.
Is this what is called lightweight concrete or what could it be?
I intend to mount a bathroom cabinet on this type of wall and even though it's light when empty, I have a feeling my dear partner
will fill it with heavy creams and other necessary contents 
A screw plug that goes about 10 cm into the wall will hold, there are special lightweight concrete plugs/screws, suitable with a 6 mm screw, no need for thicker, available at department stores, feel free to put a washer on the screw, it provides a better hold against the cabinet attachment then.
When the house is this new, there should be paperwork regarding the construction that was produced in connection with the building permit for the house. Have you checked what is stored at the municipality?
But it could certainly be lättbetong.
But it could certainly be lättbetong.