Currently considering how I can appropriately build the floor for the bathroom renovation and would like some feedback and tips on how I've thought so far. Ideally, I want the option to lay tiles and thereby, like most others, achieve an approved, light and rigid construction at a "reasonable" cost.
Planned Construction
- Tiles
- Waterproofing layer
- Self-leveling compound 30-50mm
- Water-based underfloor heating 16 mm (or 12 mm)
- 2.5 mm reinforcement mesh
- EPS concrete approx. 140 mm with reinforcement bars/mesh
- Plastic foil
- Steel beam/cast bottom (basement ceiling)
I plan to let the drains and sewage go directly down to the basement and connect them there to avoid having them in the joists and concrete.
The room is 10.2 m2 (3.3 x 3.1 m) (steel beam span 3.1 m)
Is it possible to do it this way without risking settlement? Can the steel beams as a base support the EPS concrete slab (note that I don’t have a steel beam directly under the EPS on the side towards the adjacent room)?
I have no opinion on the load-bearing capacity of these steel beams, but there is naturally some deflection in the floor in the rest of the house. I attach approximate measurements of the beam. The cast bottom between the beams is likely about 6 cm thick and quite brittle/porous so I am doubtful about its load-bearing capacity.
Would it in this case benefit from load-bearing to frame up joists 45x145mm on cc300 resting on the steel beams and then fill with EPS, perhaps it is even necessary?
How would you consider this? Grateful for answers. I’ll add more information if I’ve missed something or if something needs clarification.
