I have a heck of a problem and need help from you professionals here on the forum on how to proceed, or if it will work at all, as I am going to reinforce the floor construction so it can hold for tiles. Perhaps not such a difficult nut to crack for someone who knows or has tried it and knows it works. All tips and experiences are gratefully received!
Please excuse me if all the terms are not entirely correct, but I hope you understand and can help.
Here's the current situation.
I have a foundation on pillars (which I presume I need to reinforce somewhat for it to be possible to lay the floor I have in mind on it, tiles, if it works).
The construction is 2.5x5.5 meters, and the load-bearing beam is 45x160mm with a pillar at each corner and two more pillars under the 5-meter load-bearing beam. Joist system on 45x125mm with cc60 between the load-bearing beams.
What I'm worried about is if the pillars move up or down (due to cold, etc.) that my nice tile floor will crack...
Should I insulate around the pillars against the cold, and if so, how deep if the property is located in southern Dalarna?
What do I need to do for it to hold for a tile floor, or is it practically impossible?
Do I need to cast an extra row of pillars to reinforce with an extra load-bearing beam, i.e., an extra beam in the middle and parallel with the ones at 5.5m, i.e., 3 beams?
Got some quick tips that said:
- Make it denser between joists, cc30, according to standard.
- Insert 22mm floor chipboard.
- Lay floor gypsum on top.
- Self-leveling compound with fiber compound, 20mm.
Then the floor should be ready for adhesive and tiles, right?
As mentioned, all tips and experiences are gratefully received!
Best regards
Please excuse me if all the terms are not entirely correct, but I hope you understand and can help.
Here's the current situation.
I have a foundation on pillars (which I presume I need to reinforce somewhat for it to be possible to lay the floor I have in mind on it, tiles, if it works).
The construction is 2.5x5.5 meters, and the load-bearing beam is 45x160mm with a pillar at each corner and two more pillars under the 5-meter load-bearing beam. Joist system on 45x125mm with cc60 between the load-bearing beams.
What I'm worried about is if the pillars move up or down (due to cold, etc.) that my nice tile floor will crack...
Should I insulate around the pillars against the cold, and if so, how deep if the property is located in southern Dalarna?
What do I need to do for it to hold for a tile floor, or is it practically impossible?
Do I need to cast an extra row of pillars to reinforce with an extra load-bearing beam, i.e., an extra beam in the middle and parallel with the ones at 5.5m, i.e., 3 beams?
Got some quick tips that said:
- Make it denser between joists, cc30, according to standard.
- Insert 22mm floor chipboard.
- Lay floor gypsum on top.
- Self-leveling compound with fiber compound, 20mm.
Then the floor should be ready for adhesive and tiles, right?
As mentioned, all tips and experiences are gratefully received!
Best regards
The quick tips should suffice. But it seems a bit overkill to have both floor gypsum and fiber filler. I would have skipped the gypsum and put reinforcement in the leveling compound instead. If I'm not entirely wrong, that's the common method. I'll check back in a year when I know if my construction held up or not. 
Problem number one you need to find a good solution for is how to set joists to cc 300.
Problem number one you need to find a good solution for is how to set joists to cc 300.
Thank you!
YES, maybe those quick tips are enough. Anyway, as I mentioned, I have to ensure I get cc300 between the joists in the floor.
I visited a dealer yesterday and they completely advised against using drywall due to new regulations and instead recommended leveling with fiber-reinforced leveling compound directly on chipboard with a reinforcing mesh.
I need to continue researching how on earth I should proceed. There are great threads here on the site that you can read further into. It's just a shame that no one has anything regarding pier foundation + tile floor = true....
YES, maybe those quick tips are enough. Anyway, as I mentioned, I have to ensure I get cc300 between the joists in the floor.
I visited a dealer yesterday and they completely advised against using drywall due to new regulations and instead recommended leveling with fiber-reinforced leveling compound directly on chipboard with a reinforcing mesh.
I need to continue researching how on earth I should proceed. There are great threads here on the site that you can read further into. It's just a shame that no one has anything regarding pier foundation + tile floor = true....
The trader is right. With Boverket's new regulations on gypsum in wet rooms, the floor gypsum is removed immediately. If it is not a wet room, the gypsum becomes just an additional step to perform.
Landed on this thread after a quick Google search and thought it could be bumped with a follow-up question. I have a similar issue with a bathroom on a pillar foundation that has settled somewhat where I have a reverse slope. I have no idea how closely the joists are spaced, and the pillars are sparse. Currently, there's a vinyl floor. It's a summer cottage.
The one (and probably only right) solution is of course to tear up the floor and pillars, redo the framing, and just do it right. But, if you want to solve it with simpler efforts and without having to tear up the floor, what are your thoughts? Underfloor heating and tiles are of course a plus if it can be achieved, but not a dealbreaker. Are there current techniques to lay tiles (or equivalent) on a potentially moving floor?
To those who firmly think it's a bad idea; I agree with you. Doing it over and doing it right is the current solution. The question is out of pure curiosity to get some inputs on what alternative solutions might exist.
The one (and probably only right) solution is of course to tear up the floor and pillars, redo the framing, and just do it right. But, if you want to solve it with simpler efforts and without having to tear up the floor, what are your thoughts? Underfloor heating and tiles are of course a plus if it can be achieved, but not a dealbreaker. Are there current techniques to lay tiles (or equivalent) on a potentially moving floor?
To those who firmly think it's a bad idea; I agree with you. Doing it over and doing it right is the current solution. The question is out of pure curiosity to get some inputs on what alternative solutions might exist.