Help! Differential lock in floor crawl space? Friggebod

[Boan]

Tried to get clarity on this, and there are different pieces of advice... I have a newly built friggebod that will be heated all the time (18-20 degrees). 170mm floor structure over a post foundation that is closed with ventilation, so more like a crawl space.

Today, I have chipboard flooring and plan to lay laminate flooring on top. Should I install a vapor barrier first? Some, like Svenskt Trä, recommend a vapor barrier, albeit under the chipboard, but it doesn't really matter. But in our main house, there is no vapor barrier in the floor...

What would you have done?

 

[Boan]

No one with any comments .

 

[Tobzter]

I've just built this. There was no plastic on the floor for me.

 

[Boan]

Have just built this. Didn't use any plastic on the floor in my case

why not? Maybe the foam under the laminate is enough

 

[Tobzter]

Yes, they seem to be a bit 50/50 on whether to have it or not. And I made the decision and simply skipped it

 

[Oldboy]

Constant heating means you can have plastic, not that it's necessary. The crucial factor is the amount of moisture that will be added to the air inside the cabin and how well it is ventilated.

The floor chipboard is in itself very moisture-tight, as is glued laminate flooring. So if the beam structure is not made of equally moisture-resistant material or even denser, it should not be needed. Without a moisture barrier, a certain amount of moisture (quite limited, but still) from the foundation can be ventilated up through the beams.

 

[Boan]

Constant heating indicates that you can have plastic, not that it's needed. The crucial factor is the amount of moisture that will be added to the air inside the cabin, as well as how well-ventilated it will be.

The floor chipboard itself is very moisture-resistant, as is glued laminate flooring. So if the subfloor is not made of equally moisture-resistant material or even denser, it shouldn't be necessary. Without a moisture barrier, a certain amount of moisture (quite limited, but still) from the ground can be ventilated away up through the floor structure.

Didn't use a moisture barrier. Will sleep there sometimes. Will have a small FTX for ventilation so not much moisture will be added. There's also foam underneath now. So it should be fine.

 

[Boan]

Fiber cement backing board is used

 

[Oldboy]

The cement subfloor panel is fairly moisture-resistant, but it is joined around where some moisture exchange occurs.

It will probably be fine. I wouldn't be worried.

 

[Boan]

The subfloor panel made of cement is fairly moisture-resistant, but it is joined around the edges where some moisture exchange occurs.

It should be fine. I wouldn't be worried.

I taped the exposed joints with T-flex