Floor construction / buildup

[djagelund]

Hello,

On the wooden joists, I plan to lay three different types of flooring, as follows (from top to bottom):

1
-- Tile
-- 13 mm gypsum
-- 22 mm slotted panel with underfloor heating (waterborne)
-- Wooden joist 195 mm x 45 mm

2
-- 14 mm wood floor connecting to the tile above.
-- 13 mm gypsum or chipboard
-- 22 mm slotted panel with underfloor heating (waterborne)
-- Wooden joist 195 mm x 45 mm

3
-- 21 or 25 mm wood floor
-- 22 mm slotted panel with underfloor heating (waterborne)
-- Wooden joist 195 mm x 45 mm

Are these dimensions sufficient from the perspective of flex, etc., in the floor?

Regards,
/Daniel

 

[steelis]

I used 28x120 as glespanel.

 

[djagelund]

A bit better load-bearing capacity, of course, but it shouldn't be necessary to have thicker slabs or something over the sparse panel? I'm thinking primarily where I will have tiles.

/Daniel

 

[vojma]

Depends a bit on how large the span is on the bjälklag.

/V

 

[djagelund]

The joists have a spacing of CC 600 mm. The lath panel will have a smaller CC measurement since it needs to be adjusted for how closely the pipe should be placed, but I would guess that the pipe should be CC 300, and then the lath panel will be around CC 150 mm.

 

[jon_h]

Then it becomes a bit too weak for ceramics the way you intended to build.

 

[steelis]

I have it like this where I have tiles:
Floor joists 220x45, cc60
28x120 sparse
28mm chipboard
13mm plaster
self-leveling compound
tiles

Other floors:
Floor joists 220x45, cc60
28x120 sparse
28mm chipboard
9mm click floor

The downside I've noticed with this is that I need to have a higher temperature on the supply line where I have tiles, I've had to restrict the underfloor heating quite a bit where I have a click floor to raise the temperature where I have tiles.
In hindsight, I would skip the chipboard where I have tiles.