Boards on the inside

[eriobe]

Hi
I am going to build an outer wall and plan to use vertical studs (45*170) and to break the thermal bridge, I thought of using horizontal 45*45 studs. Initially, the plan was to have them on the outside, but to facilitate electrical wiring, etc., I thought of placing them on the inside.

I was thinking of having full sheets to increase the torsional rigidity, but to kill two birds with one stone, my idea was to place them at the very inside. Is torsional rigidity affected by this?

The construction will then be (from outside to inside)
cladding -> batten -> wind barrier -> vertical studs (45*170) with insulation -> vapor barrier -> horizontal (45*45) with insulation and electrical conduit -> plywood

/E

 

[prototypen]

With that construction, the house will remain standing.
You can also lay the plywood down, making it sturdy at the joints.

Protte

 

[Olfe]

Okay, then I have a question about whether it makes a difference if you use plyfa or 12 mm chipboard? Does the plyfa have any property for torsional rigidity that the chipboard doesn't have?

 

[prototypen]

Then we must ask what kind of foundation the house has?
Slab on grade does not require special torsional rigidity, so chipboard is still overkill.
Pier foundation on clay-rich, frost-heaving soil might require you to glue the plywood as well.

On my next build, I will have a slab on grade and OSB, OSB because then you can hang heavy things on the wall.

Protte

 

[Paul-Staffanstorp]

The advantage of plywood compared to particle board is mostly that plywood is better for screwing things into afterwards...

 

[Olfe]

it is an extension (3x7m) that stands on pillars which are about 2 meters long (deep). It would probably take a lot before these move. My interpretation is thus that if it is stable ground, chipboard can be used.

 

[prototypen]

I live in a particle board house but the new one I'm building or remodeling will be plywood, it even works with the cheapest from byggmax. Or OSB. Particle board creates such unpleasant dust when you cut it, from particle board you get dust, from plywood you get sawdust.

Protte

 

[Ola78]

Another advantage of plywood vs particle board is that the plywood is gentler on the saw blade and on the teeth of the hole saw. At least that's how I've perceived it; the blade dulls faster when working with particle board.

 

[prototypen]

Yes, that's how it is, plywood is wood with glue, particle board is probably glue with wood.

Protte

 

[andersmc]

Or, as Protte has already mentioned, you can use OSB. It's more of an intermediate between plywood and particle board.

 

[Olfe]

With the advantages that plywood has compared to particle board, it seems like OSB is out of the question as it is more similar to particle board than plywood. So I guess I'll just have to consider whether I should still go with plywood. I have ordered particle board ;-)

 

[MathiasS]

There is often a lot of opinions on how it works with plyfa, OSB, and chipboard. The difference is not as big as one might think. Some links referring to practical tests done by SP.

http://kampanj.byggelit.se/svar22.html

http://www.beijerbygg.se/templates/BB_ByggradListItem.aspx?id=52659

 

[prototypen]

There isn’t much difference between plywood and OSB; OSB is shavings or the leftover scraps after plywood manufacturing (veneer that breaks).

OSB is more wood than glue.

If I have to choose between OSB and plywood behind gypsum, I take the cheaper one without thinking twice.

Protte

 

[Olfe]

MathiasS: Thanks for the links!