Construction height floor heating in sparse paneling - need help

[gluecifer]

We are going to build a conservatory on piers, the 195mm joist framing is laid at 60cc, and there will be 195mm insulation. For year-round use and hydronic underfloor heating with 20mm pipes and tiles.
Some people tell me that it’s too little insulation, but now we are at a stage where it’s difficult to backtrack and redo.

I have 8.5cm to build on top of the joist framing before it is at the same height as the floor in the room we will exit through.
If I understand correctly, there are no grooved floorboards for 20mm pipes, otherwise, I would have thought that it works with double gypsum and then tiles(?).
As it is now, it's leaning towards 28x120 slatted paneling or 28x70 laid on top of the joist framing (not in), not sure what the difference will be with 120 or 70, if it's possible to lay the pipes even closer possibly.

Questions for someone knowledgeable: To support tiles on my 60cc, I presumably need 22mm floorboards and gypsum on top of the slatted paneling, but will one (1) layer of gypsum be enough if I fully glue and screw it?
If I need double gypsum, can I instead use 18mm floorboards?
It is, of course, about achieving as low a building height as possible, but I absolutely don’t want cracked tile joints or similar issues.

Anyone who has built something similar and can advise on the building height?

 

[Täpp_Hans]

I installed underfloor heating in a bathroom with 22 chipboard + gypsum + poured concrete and it insulated quite well
I hope you find a better way

 

[gluecifer]

Ok, but did you include sparse panels on 60cc floor beams in your bathroom?

 

[surris]

300cc would be needed for tiles... can you reinforce the joists? Regarding the insulation, it also depends on how the rest of the room is insulated if the underfloor heating will be able to heat the room. For new construction, 300mm is recommended just for comparison.

Otherwise, you use floor chipboard 22mm, floor mesh, self-leveling compound with fiber-reinforced compound 40mm +-. Then you have 13mm for tiles left. Embed the underfloor heating, but I would probably choose a thinner pipe than 20mm. It might be a bit thin with the compound above the pipe.

 

[Vante]

Have you checked out Ardex K 75, and embedding the hose?

 

[gluecifer]

You should have had 300cc for tiles... can you reinforce the floor structure?
Regarding the insulation, it depends on how the rest of the room is insulated as well, if the underfloor heating will be able to heat up the room.
For new construction, 300mm is recommended just for comparison.

Otherwise, you put down 22mm floor chipboard, floor mesh, and pour self-leveling compound with fiber-reinforced compound 40mm +-. Then you have 13mm for the tiles.
Embed the underfloor heating, although I would probably choose a thinner pipe than 20mm. It might be a bit thin with compound above the pipe.

It would be possible to add more joists to achieve 300cc, shouldn't be a problem.
40mm of compound on 30sqm sounds very costly, but then did you mean I should embed the pipe in it?
Can you attach foam underneath the subfloor boards to get slightly more insulation from below?

 

[Autodidak1]

We are going to build a conservatory on stilts, the 195mm beam grid is laid in 60cc and it will be 195mm insulation. For year-round use and waterborne underfloor heating with 20mm pipes, and tiles.
Some people tell me that it's too little insulation, but now we are in a situation where it is hard to backtrack and redo.

I have 8.5cm to build on top of the beam grid before it is at the same height as the floor in the room we will exit through.
If I understand correctly, there are no grooved floorboards for 20mm pipes, otherwise, I would have thought it works together with double plasterboard and then tiles(?).
As it stands now, it leans towards 28x120 sparse panel or 28x70 placed on top of the beam grid (not in it), not quite sure what the difference will be with 120 or 70, possibly if the pipes can be placed even tighter.

Questions to someone knowledgeable: To manage tiles on my 60cc, I need to have 22mm floorboard and plasterboard on top of the sparse panel, but is it enough with one (1) layer of plasterboard if you fully glue and screw it?
If I need double plasterboard, can I have 18mm floorboard instead?
It’s obviously about getting as low a building height as possible, but I absolutely don’t want cracked tile grout or similar problems.

Someone who has built similar and can advise regarding the building height?

If you're having tiles and underfloor heating, it's better with 16 mm underfloor heating and 200 CC on the loops. With 20 mm underfloor heating and 300 CC, you will have a floor that is warm and cold depending on where you put your feet.

If the beam grid has the right carrying capacity, there are no problems with 600 CC on the beams. Skip the floor plasterboard and apply self-leveling compound instead, it’s steadier and provides more even heat.

 

[surris]

It would be possible to add more studs to get 300cc, shouldn't be a problem.
40mm filler on 30 sqm sounds very expensive, but did you mean that I should cast the hose into it?
Can you attach foam insulation under the subfloor boards to get slightly more insulation from below?

Yes, you cast the hose into it.
I mostly thought if you can't get cc300, you would use self-leveling compound to stiffen it up.
Either you continue with cc600, use floor chipboard, and self-leveling compound. Or cc300, floor chipboard, and floor plasterboard. Or what I would have recommended and chosen, cc300 floor chipboard and self-leveling compound.

Depending on how the construction of the ceiling and walls is, 195mm insulation is okay. But yes, you can insulate more from below.