Nivell, Subfloor, Jape or Granab, which is "best"?

[anders07]

Time to tackle the final part of the house, the basement, built in 1977.

Drained with Platon on the exterior, but slightly elevated moisture levels at the bottom of the walls.
Furthermore, there's blåbetong (low-radiation) in the exterior walls, so I was thinking of using a ventilated floor and outer walls.

What is the simplest and most efficient system nowadays for floors and walls?

 

[ANTYN]

Time to tackle the last part of the house, the split-level basement, built in 1977.

Drained with Platon on the outside, but slightly elevated moisture levels at the bottom of the walls.
Additionally, the outer walls are made of blåbetong (low-radiation), so I thought I'd go with ventilated floors and outer walls.

What is the simplest and most efficient system nowadays for floors and walls?

I am facing the same question, what did you ultimately choose and why?

 

[Kardan79]

Faced with the same question, what did you choose in the end and why?

You must consider the circumstances of your specific case.
Do you need mechanical ventilation, or is passive ventilation sufficient?

Jape's and Platon's solutions are not best suited for uneven or sloping slabs but are cheap and good.

Giha, Granab, and Nivell/Subfloor are better for sloping and/or uneven slabs but are much more expensive.

Giha's solution can be used even when there is very little space (low construction height). I don't know more.

Nivell and Subfloor originated from the same company and use the same ventilation supplier. The differences between the companies' products are small.

Granab's system fundamentally doesn't differ much from Nivell/Subfloor's. However, I like straight fine steel beams, the possibility to use damping elements with different firmness, and that separate insulation carriers aren't needed. Granab's solution was absolutely the most expensive when we were to install mechanically ventilated subflooring, so we chose against it. However, I have installed it before.

We chose Nivell/Subfloor since the slab was uneven and sloped a bit. I wasn't even aware of Giha back then and know very little about it. In choosing between Nivell and Subfloor, I would base it on availability and price at retailers near you. Nivell has 45x95 beams. Subfloor does not. However, such beams are not required in a residential environment. Both options become quite expensive, but you can save a lot by purchasing insulation, nail plugs, sealing tape, etc., from other brands. Feel free to ask for tips if you choose Nivell/Subfloor.

 

[ANTYN]

You need to consider the circumstances in your particular case.
Do you need mechanical ventilation, or is passive ventilation sufficient?

Jape and Platon's solutions are not best suited for uneven or sloping slabs, but they are cheap and effective.

Giha, Granab, and Nivell/Subfloor are better for sloping and/or uneven slabs, but they become much more expensive.

Giha's solution can also be used when very little space is available (low building height). I don't know more.

Nivell and Subfloor originate from the same company and use the same ventilation supplier. The differences between the companies' products are small.

Granab's system doesn't fundamentally differ much from Nivell's/Subfloor's. However, I like the straight, nice steel beams, the possibility to use damping elements with different firmness, and that no separate insulation carriers are needed. Granab's solution was absolutely the most expensive when we were going to install mechanically ventilated underfloor, which is why we chose against it. However, I have installed it before.

We chose Nivell/Subfloor as the slab was uneven and slightly sloped. I didn't even know about Giha back then, and I know very little about it. In choosing between Nivell and Subfloor, I would base it on availability and price from nearby dealers. Nivell has 45x95 battens. Subfloor does not. However, such battens are not required in a residential environment. Both options become quite expensive, but there is much to save by buying insulation, nail plugs, sealing tape, etc., of another brand. Feel free to ask for tips if you choose Nivell/Subfloor.

Thanks for the detailed answer.
I have a sloping slab and a "ditch" against the exterior walls, so Platon/Jape can't be placed.
The building height is only 50mm to the top of the batten.
Ventilation is needed, in summer/autumn the humidity in the slab rises.
I chose against Giha as they themselves had very short poor responses and few documents about the ventilation solution; I got the feeling it wasn't a complete solution.

I have requested quotes from Subfloor, Nivell, and Granab, priced in that order.
Subfloor about 685:- and Nivell about 740:- per square meter for the entire solution with vent.
I laid a Nivell over ten years ago, so I have the tools, drill with tap and batten tool.
Buying insulation myself is probably out due to the special measure of 34mm; I don't have room for a 45mm batten.

 

[anders07]

I'm facing the same question, what did you choose in the end and why?

I went with ventilated Platon... See my thread here for more detailed information: https://www.byggahus.se/forum/threads/projekttrad-badrum-med-angbastu.527717/

 

[anders07]

I used ventilated Platon... See my thread here for more detailed information: [link]

More specifically, a bit about Platon starts here: https://www.byggahus.se/forum/threads/projekttrad-badrum-med-angbastu.527717/#post-5889478

 

[Kardan79]

Thanks for the detailed response.
I have a sloping slab and a "ditch" against the outer walls so it doesn’t go down Platon/Jape.
The building height is only 50mm to the top of the batten.
Ventilation is needed, in summer/autumn the humidity in the slab rises.
I ruled out Giha as they themselves had very short poor answers and few documents about the ventilation solution, I got the feeling that it was not a complete solution.

Have requested quotes for Subfloor, Nivell, and Granab, priced in that order.
Subfloor about 685:- and Nivell about 740:- per square meter for the entire solution with vent.
I myself installed a Nivell over ten years ago so I have the tools, drill with taps and the framing tool.
Buying insulation myself probably falls off due to special measurement 34mm, I don’t have space for a 45mm batten.

My perception of both Nivell and Subfloor is that they are fantastic to deal with! We got a lot of tips and advice when we asked for it. And when Beijers messed up an order, Subfloor made sure to ship things directly to us (on-site within 24h of the call) and then sorted it out with Beijers afterward.

If it is a relatively simple space to ventilate (four straight walls and no obstacles), I would never pay for the project planning (ventilation). It is not needed then, if you have previously installed a mechanically ventilated subfloor.

I didn’t know Subfloor/Nivell had 34mm "wooden battens", or are you going to use a metal batten? Are there also 34mm thick "Nivell panels", and "air distribution strips" for the low building height? I really preferred Subfloor’s soft air distribution strip over Nivell’s solution (have used both variants)...

Will you use aluminum butyl tape and/or sealing tape?
I have only used aluminum butyl tape, building foil tape and bitumen-based sealing compound (have an old wood house, and had a lot to seal).
The butyl tape was incredibly much cheaper to buy at, for example, Bauhaus. Bought a wide variant and split it in half (lengthwise).
https://www.bauhaus.se/vilfa-tejp-aluminium-100mmx10m
https://www.bygghemma.se/hus-och-by...tejp-tesa-sealflex-plus-50-mm-x-25m/p-1553567

Also bought nail plugs at Bauhaus. I think it was Fischer. Less than half the price compared to buying from Nivell/Subfloor.