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I am working on an extension and have some questions about when to build the interior walls? On the diagrams I've seen on the wood guide and other places, it seems that interior walls are built directly against the frame. That is, before subfloor, ceiling, and before the installation and surface layers of external walls. https://www.traguiden.se/konstruktion/konstruktionsexempel/vaggar/

But during renovations, it seems like interior walls are just put up directly on all the surface layers. It's a bit difficult to do otherwise during renovation, but what is the disadvantage of this? Why can't I complete the entire building's subflooring, drywall ceiling, and the surface layers of the external walls before starting with the interior walls? Then you avoid a lot of cutting in all the corners that occur. Then you only lay the parquet separately in each room (which needs to be able to move a bit).
 
Renovating a house where all four exterior walls have been built, the floor laid, and the walls paneled before all interior walls were put up. Cursing this method now when it's time to replace the flooring in some rooms. Tear down more than necessary or use a multitool in the floorboard, then have to insert new floor joists to lay plank flooring. Ugh! The only excuse is having a house model that can then be planned with different room layouts. I've built additions myself, and it would never occur to me to build this way. It also complicates electrical installation, etc.
 
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Okay, but with my method, wouldn't it have been no problem? The parquet was laid separately in each room, I wrote. You only replace the surface layer and not the chipboard, right?

I was thinking about the electrical installation too. But what if you only lay subfloor and ceiling before interior walls then?

One downside is that I want to have grooved floor panels for underfloor heating, I realized. Then you might want to lay these per room... So the only thing left is to lay the ceiling first :)

So I should complete the framework for interior walls before I start with any surface layers at all? And cut like crazy in every room instead... Cut lots of floor panels, cut battens, cut ceiling panels, cut OSB + plasterboards.
 
This concerns a cabin from the 80s. I’m replacing old chipboard with solid flooring. So the one who built it doesn’t have to sit there and curse the idiocy...:D
 
If you set up the interior walls before any screeding materials are installed, you have some advantages. Primarily, electricians and plumbers can prepare all installations. Pipes, electrical cables, and boxes are not only located in the exterior walls but also in the interior walls, ceiling, and floor. It is most efficient if electricians and plumbers can do as much as possible in a few instances. Otherwise, you constantly have to adapt the construction so that other craftsmen can do something small now and then.
 
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Ok in my case, the scenario of plumber/electrician is not an issue, but I understand your point.

However, I think that in a normal situation, one could at least lay down the subfloor first? But not in my case since I'm installing channels for underfloor heating.

If one cannot install the ceiling plasterboard first, there is no point in installing the battens either, I assume, because they would end up in the wrong position.
 
Fulkemisten
Suppose you get a water leak? It starts raining during a downpour while you're on vacation, or you or someone else gets a 1000-liter aquarium that breaks on its own when everyone is at work and school? Anything can happen where, for example, you would want to replace both ceiling gypsum and floor chipboard, open up and dry out, and remove soaking wet insulation. Or something else you might not think of.

Frame is frame. Even interior walls if possible, luxury to avoid placing these on anything other than studs.
 
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Fulkemisten Fulkemisten said:
Say you get a water leak? It starts raining in during a downpour when you're on vacation or you or someone else gets a 1000-liter aquarium that cracks by itself while everyone is at work and in school? Anything can happen where you, for example, want to be able to replace both ceiling gypsum and floor chipboard, open up and dry and remove soaking wet insulation. Or something else you just don't think about.

Frame is frame. Even interior walls if possible, luxury to avoid placing these on anything other than studs.
Yes, what you're saying makes sense. Better to separate the surfaces in each room anyway.

But I didn't understand your last sentence, you mean luxury = bad in this case?
 
Fulkemisten
No. Luxury to be able to avoid placing interior walls on top of, for example, subfloors, which sometimes must be done during renovations.
 
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Came up with a thought now that I'm planning.

Can/should you at least install a vapor barrier and battens on the ceiling before non-load-bearing interior walls? So that I can directly now in the winter insulate the ceiling and apply some basic heating. And then the battens function as support at the top for the interior walls, instead of installing 1.5m "short studs" in the ceiling.
 
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É ÉlPon said:
Came up with a thought now that I'm planning.

Can/should you at least set up a vapor barrier + furring in the ceiling before non-load-bearing interior walls? So that I can directly insulate the ceiling now in winter and apply a bit of base heat. And then the furring serves as support at the top for the interior walls, instead of installing 1.5m "short beams" in the ceiling.
I managed to search and find this thread which confirms how I intended to do it. Furring first and then the wall. And 1-2 extra furring when the wall runs the other way along with the furring.
 
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