Rough tongue-and-groove boards - where to find?

[ToRy]

Hello!

I'm looking for tongue and groove boards to cover interior walls with, which should of course be painted. The problem is that I can't find raw boards with the surface I want. If you look at, for example, Byggmax or K-Rauta, their raw boards have a completely smooth surface and one that is finely grooved. I'm looking for the rough surface you find on most outdoor panel boards. Does anyone have any tips on where I can find what I'm looking for?

Regards,
ToRy

Edit: I forgot; preferably shopping in or around Borås/Ulricehamn, but Gothenburg works too...

 

[Robert-san01]

The lumber I bought at Byggmax this week is "planed" on one side and "split" on the other.

 

[ToRy]

Okay, do you possibly have a picture? Is it this one you bought then? http://www.byggmax.com/se-sv/byggva...spont-trekantsregel/08222120/raspont-20x120mm Because the one I find at Byggmax (irl) doesn't have the rough surface that can be seen on the picture on the website, instead, it is finely grooved as mentioned. Maybe it depends on local suppliers....?

 

[Robert-san01]

Unfortunately, I don't have a picture as they are under the tile roof of the shed.

It was 17x95 I bought. It can definitely vary between suppliers and even between shipments. I bought some extra planks and they were not the same as the first ones I bought.