Illustration of a house with a garage showing the basement layout. The garage has lightweight concrete elements and an open roof structure.
Hello,

I have a house with an extension consisting of a garage on the side (the image shows the basement level). 1 floor plus basement. Above the garage is the living room. The joists in the larger part of the house are wood, while the garage has light concrete elements with tongue and groove. The span is about 4.5 m. The room is about 9x4.5m.

The plan is now to convert the garage into a family room, which includes bricking up the door and installing a door.

Since the ceiling height is poor, I would like to remove half of the floor elements and replace them with some type of beams. This is to allow for lighting, electricity, etc. The plan is also to install a spiral staircase down.

Can this be done from below?
How do you dismantle these?
What do you replace them with?

Grateful for input

Krilleman
 
S
I wouldn't touch them. Even if I could work from both sides, I wouldn't tear them down.
You surely have walls that stand on the joists, and you need support for them.

One can tear one down at a time and prop up.
 
From what I understand, the outer walls don't rest on these. Otherwise, you would have seen them.

Maybe one could take one down, prop up, replace with some beam, etc.

Probably only need to take 4-5 of them to make room for stairs, etc.

Perhaps one should bring in a structural engineer to check this?
 
Looks the same in my house. Here, from what I've seen, the wall elements (also siporex) stand on the floor elements. Headers, etc., in these floors are not something you come up with yourself, at least not me. One of the difficulties is attaching anything to these elements at all, but that can be remedied with a new beam underneath. However, how it turns out at the ends, where the wall elements stand, feels like a tricky problem.
 
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RoughChuck
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S
better to take advice from someone who has seen the construction in reality.
 
The walls on the upper floor are standard studs (wood frame).

Has anyone removed any elements like these?

Does not/spot have any structural function, or is it just for installation, i.e., to make it smooth and tight?
 
S
Tongue and groove are for achieving a tight fit
 
Probably going to bring in a designer. Doesn't feel like an ordinary carpentry job...
 
S
it works, but maybe not as a single person
 
If one were to attempt this, one would:
1. Tear up the floor above
2. Support the structure
3. Saw into the tongue and groove. Then split the element.
4. Carefully (with the help of x number of people) lower the parts.
5. Replace with a beam suggested by the engineer.
 
S
stamp up from the basement to the roof.

tear down and clear away everything on the blocks. stamp under the block. cut off at the walls. cut the block into liftable pieces.
 
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