What is this material on the inside of the exterior wall?

[Keos_Bygg]

Hi,

I have removed a breast panel made of some thin board material, and underneath it are the boards you see in the picture. Can anyone, just by looking at the picture, say what material it likely is?

Beneath this, I think I can glimpse raw wood in the gaps.

I'm a bit tempted to remove these boards and install electrical wiring, and then put up drywall as the surface layer, but I don't want to remove the boards until I know what they are and what function they might serve (insulation?).

Grateful for any answers!

 

[nb.]

Hello,

I have removed a wainscoting made of some thin board material and underneath it are the boards you see in the image. Can anyone just by looking at the image say what kind of material it is likely to be?

Underneath this, I think I can glimpse raw pine boarding in the gaps.

I'm a bit tempted to remove these boards, lay in electrical wiring, and then put gypsum boards as the surface layer, but I don't want to remove the boards until I know what it is and what function they might serve (insulation?).

Grateful for answers!

The thin board looks like masonite, the thick soft one treetex. But it's a bit hard to see. The masonite is about 4 mm, the treetex around 12-16 mm.

In the extension (built in 1949), the walls from the inside out are constructed of masonite, raw pine boarding, treetex, standing 2 (?) inch planks, treetex, air gap, facade panel.

In my case, the treetex is insulation.

I have routed for the electricity in the raw pine boarding and treetex, but have not removed it. I've removed the masonite and replaced it with 6 mm gypsum, then I could keep all the moldings, etc.

 

[Keos_Bygg]

The thin board appears to be masonite, the thick soft one treetex. But it's a bit difficult to see. The masonite is about 4 mm, the treetex around 12-16 mm.

In the extension (built in 1949), the walls from inside to outside are constructed from masonite, raw boards, treetex, standing 2 (?) inch planks, treetex, air gap, facade panel.

Treetex serves as insulation in my case.

I have routed for electricity in the raw boards and treetex but didn't remove it. I removed the masonite and replaced it with 6 mm gypsum board, this way I could retain all the trims, etc.

Awesome, two questions:

1. What tools did you use to route in the raw boards and treetex?

2. Did you have to remove and then reinstall the door and window trims when you put up the gypsum board?

 

[nb.]

Awesome, two questions:

1. What tool did you use to track in råspont and treetex?

2. Did you have to remove and then reinstall the door and window moldings when you put up the drywall?

1. Circular saw set to about 16 mm and then chisel. You have to be careful with the råspont so that you don't cut it incorrectly. Typically, I made a cut in the råspont so that a slat could be removed.

2. No, I cut off the msonite with a utility knife along the moldings and used renovation drywall which is about the same thickness, so it doesn't show.