Wood fiber (Plyfa)

[Dan_Johansson]

If you want to be really pedantic, plywood is a brand name sometimes referred to as plyfa. The board is called cross-veneer.

https://www.plyfa.se/

I would guess that Plyfa would like to call plyfa a brand name.. 😉🤓

 

[HEM2121]

A few years ago, a Myresjöhus was built in the neighborhood. They used plywood as the sub-roof, not Plyfa.

So this is still being done! That's interesting. I'll be making a call to Myresjöhus to hear their thoughts and which Plyfa they use and what they think about its durability over time.

 

[Installation]

[link]

I would guess that Plyfa is happy to call plywood a brand.. 😉🤓

Yes, see someone has made a brand out of it. Nice, one must say.

 

[HEM2121]

Well, someone has made a trademark of it. Nicely done, one must say.

Yep. It's going to be a conversation there as well, I expect nothing less than them emphasizing their product but they can at least specify and justify its excellence more than that I assume.

Plyfa Plywood AB​

 

[Daniel 109]

In the headline, you wrote fiberboard. Plyfa is not a fiberboard. What is the product that is used in the house?

 

[fribygg]

The location is fantastic but I don't want to be blinded by it.

Buy it!
A roof/ceiling is easy to replace (many do it in preparation for solar panels), but the location must be good already when you buy the house since it's practically impossible to do anything about it.

 

[Henningelvis]

Is it really plyfa/plywood? I lived in a house from 1991, and there was a type of chipboard as the under-roof. It was slightly green-colored and probably treated with something. From what I could determine, it was unproblematic. It only sagged slightly between the rafters. There were concrete tiles on top, and we had no moisture problems during the ten years I lived there.

 

[HEM2121]

Is it really plyfa/plywood? I lived in a house from 1991, and there was a type of particle board as the under-roof. It was faintly green-colored and probably treated with something. As far as I could determine, it was unproblematic. It only sagged slightly between the rafters. There were concrete tiles on top, and we had no moisture problems during the ten years I lived there.

It is referred to as Wood Fiber Boards (Plyfa), battens, and concrete tiles.
The roofing is constructed parallel from the eave to the ridge/wind.

 

[Daniel 109]

That sounds wrong. It could probably be fiberboard. But it is usually referred to as masonite. Flyfa, as mentioned, is a plywood board. But oil-tempered "board" is a common solution if you want to keep the price down.

 

[Henningelvis]

I guess the broker does not know the difference between fiberboard and plywood. It is likely that it is some form of treated fiberboard in the ceiling.

 

[HEM2121]

It sounds wrong. It could probably be fiberboard. But it's usually referred to as masonite. Flyfa is, as mentioned, a plywood board. But oil-hardened "board" is a common solution if you want to keep the price down.

That's my feeling too, I think it's Plyfa but Träfiberskiva is a description to explain that Plyfa is made of wood. This needs to be checked.

 

[Isakare]

Lived in a house from '85, now live in one from '92, both with plywood under concrete tiles.
If you maintain the tiles, i.e., clean them and keep moss away, plywood isn't a problem.
A neighbor opened the roof to make a dormer on the house from '85, and it looked like new underneath, the plywood was a bit thicker than the normal 12.5 mm, about 15-20 mm.
Wood fiber, greenish ones some mentioned, are impregnated particle boards, they are worse and tend to sag between the roof trusses over time.

 

[HEM2121]

Lived in a house from 85, now living in one from 92, both with plywood under concrete tiles.
If you maintain the tiles, i.e., clean them and keep moss away, plywood isn't a problem.
A neighbor opened the roof to make a dormer on the house from 85, it looked like new underneath, the plywood was slightly thicker than the normal 12.5 mm, around 15-20 mm.
Wood fiber, greenish as someone mentioned, is impregnated particleboard, they are worse and tend to sag between the rafters over time.

If they are greenish, do you know what they are impregnated with?

 

[Daniel 109]

Likely some copper salt.

 

[Isakare]

If they are greenish, do you know what they are impregnated with?

No, I just know they exist. Even wet room chipboard is greenish. Maybe you can google what they contain.