Material in the subfloor panel?

[Maba]

What should be used nowadays as a baseboard? In the past, one used to use asfaboard, but it isn't used today, right?

 

[Styx]

I have used 50mm rebated cellular plastic, quality S80 in a couple of houses now. It works perfectly, at least so far..

In addition to being bright, clean, and easy to work with, it insulates the floor beams themselves, which reduces temperature differences in the floor joists, which is good from a moisture perspective.

So, the cellular plastic is nailed across the floor beams and the insulation is then simply laid straight down between the joists.

 

[Styx]

Now Styx mentions 500 mm unfaced styrencellplast in quality S80. (That is, it can withstand 80 kg/cm[sup]2[/sup] in compression. Let's see how long it holds for the bending moment )

Faced, I wrote actually, not unfaced. Unfaced likely gaps and moves quite a bit..

Personally, I doubt it will bend down considering it is nailed at cc60.

Formplyfa is also fine, yes, but expensive - and you miss the extra insulation of the joists..

 

[andersmc]

What kind of nails do you use to nail the cellplast with?

 

[Styx]

4" galvad..
Of course with those facade washers or whatever they are called..

 

[Maba]

Can you use oil-hardened board in the subfloor? Plastic-coated form plywood is surely more expensive than laminate flooring :'(

 

[Fein]

There is a board called trossbotten board in oil-hardened masonite 6.2x560x1155.

It costs about 40:- per board and is step-through safe etc.

I used such. It has only been up for a week, but so far it works well ;D

 

[Styx]

There is also some sort of blindbottenplyfa if it is board that should be laid..
http://www.beijerbygg.se/templates/BB_Produkt.aspx?id=4045

 

[lofjon]

I have used 50mm rebated cellplast, quality S80 in a couple of houses now. It works perfectly, at least so far...

Besides being light, clean, and easy to work with, it insulates the joist itself, which reduces the temperature differences in the floor joists, which is good from a moisture perspective.

So, the cellplast is nailed across the floor joist and the insulation is then just placed right down between the joists.

Do you nail the cellplast underneath the joist then? Where can you get this cellplast?

 

[Styx]

Yes, from underneath - across the joists..

www.cellplastdirekt.se
http://www.sto.se/index.htm

 

[lofjon]

Yes, from underneath - across the joist..

What distance should I have down to the ground from the foam plastic? Is 35-40 cm enough?

Otherwise, the ground under the house will be lower than the ground outside the crawl space foundation, does that matter? I was wondering if water might seep in then.

 

[Torpar_Karin]

I think you need to have about 1000 cm to the ground, how else are you going to crawl under and nail?

 

[Mats]

It is certainly possible to crawl and nail on much less than a meter always, it's just about pulling in the beer belly. 40 is workable but I don't know how it will be with moisture etc.

 

[mattiasp]

There is a board called trossbotten board in oil-hardened masonite 6.2x560x1155.

It costs about 40:- per board and is breakthrough-safe etc.

I used this. It has only been up for a week, but so far it works well ;D

Shouldn't the width be 550 mm? If you frame "normally," the distance between the studs is 600-45=555 mm

 

[sm4vzk]

a WARNING is in place.... using plywood material in the subfloor has made me 200,000kr poorer... Plywood, due to its sandwich construction, eventually becomes saturated with moisture between the glue layers and starts to mold... and it doesn't matter if it's mold-resistant treated or not...
Mold on a mold-resistant treated product just smells worse...
Foam plastic, or pure wood, or oil-treated masonite gets my vote... but in my case, the crawl space disappeared, and I have now cast a slab afterward inside the entire 38m2 house.