I'm thinking about starting a basement project and have read and watched through a lot of exciting threads here. My main concern now is whether I dare to tear down non-load-bearing partition walls and the floor at the same time; am I undermining the exterior wall due to the external soil pressure?
It is difficult to comment without more input, but it is clear that both the floor slab and non-load-bearing partition walls in the basement can be significant. Above all, one needs to know the basement construction and surrounding soil conditions.
The basement walls are poured concrete, about 30cm thick with approximately 150cm below ground on a slope away from the house. And clay soil.justusandersson said:
But it is done with insoles where a concrete floor has been cast in each room formation?
There is probably no general answer to your question, you need to start digging and get a structural engineer who can assess the risks in your individual case once you have exposed enough of the construction.
An alternative could be to bolt through horizontal flat irons on either side of the lightweight walls, tear down the first and second layer of bricks and support with 1-2 jacks until you have removed foam and then underpin the partition walls in sections until you can remove the jacks and then finish casting the floor and take down the walls.
It adds some extra work and time-consuming steps, but it might be worth it to sleep well.
There is probably no general answer to your question, you need to start digging and get a structural engineer who can assess the risks in your individual case once you have exposed enough of the construction.
An alternative could be to bolt through horizontal flat irons on either side of the lightweight walls, tear down the first and second layer of bricks and support with 1-2 jacks until you have removed foam and then underpin the partition walls in sections until you can remove the jacks and then finish casting the floor and take down the walls.
It adds some extra work and time-consuming steps, but it might be worth it to sleep well.
Thanks for the good thoughts and tips! Yes, there is a small sole, and considering that all rooms have different floor heights, I think it is because they cast the floors in the rooms as you meant, right?KjellTimell said:But it is done with soles where a concrete floor has been cast in each room formation? There is probably no general answer to your question, you will have to start digging and bring in an engineer to assess the risks in your individual case when you have exposed enough of the construction.
An alternative might be to bolt through horizontal flat irons on either side of the partition walls, tear down the first and second course of bricks, and support with 1-2 jacks until you have removed the foam and then underpin the partition walls in sections until you can remove the jacks and then finish casting the floor and take down the walls.
It adds some extra work and time-consuming tasks, but it might be worth it for peace of mind.
I suppose that's the way it is, you want to do things as smoothly as possible but not lose the whole house in the process.
The information is still a bit sparse. Year built, what does the structure of the house look like? A floor plan of the basement would also facilitate an assessment. Earth pressure is usually not an issue unless the surrounding ground is subjected to abnormal vibrations, heavy transport, etc. A reinforced 30 cm thick concrete wall can withstand quite a lot; it is essentially a bomb shelter. Concrete basement walls were quite common in the 30s and 40s. From the 50s onwards, concrete blocks became more common. Depending on how the floor structure of the ground floor is designed, one should be cautious about demolishing basement walls.