What are these panels? Basement ceiling.

[Byggnovisen]

Have a house built in 1958. In the ceiling of the basement, there are what I interpret as paper-covered boards with a material behind that appears pinkish and resembles gypsum. Some are painted, others unpainted. I am wondering if it could be as simple as gypsum or if it potentially might be some form of asbestos board? The last picture shows the "pink" interior that crumbles just like gypsum.

Were there even paper-covered asbestos boards? If not, then it's probably gypsum.

I am planning to renovate part of where these boards are, but hadn't really intended to replace the ceiling, though there will be drilling and dust involved. It would be bad if it is asbestos.

 

[GoC]

It seems to be a mix of gypsum boards and masonite boards judging by the pictures. Eternit boards are concrete gray as they are a thin asbestos-reinforced concrete board that is also hard like concrete.

 

[Isakare]

Maybe it was masonite from the beginning, which might later have been covered with gypsum due to fire protection? (I don't know when gypsum came about). I had a house built in '66, completely covered with gypsum on the inside like a house today, that gypsum was pink.

 

[DaDolly]

Looks like drywall. They are probably located in the boiler room or in a room next to the boiler room?
The second picture is harder, tretex/masonite perhaps.

 

[DaDolly]

But eternit indoors to cover an entire surface can't be common.

 

[Byggnovisen]

Looks like drywall. They're probably installed in a boiler room or in a room next to the boiler room?
The second picture is harder, tretex/masonite maybe.

Yep. They're in the boiler room as well as in the pantry and the corridor between them. The masonite seems to have been screwed on top of them at some point.

 

[Magnus E K]

When I was looking for a house, I rejected (at least) one house partly because it had asbestos cement in the entire basement ceiling and another that had it in the garage ceiling. I've gotten the impression that this was common in the 50s, 60s, and into the 70s.

But I agree that in the pictures here, it doesn't look like asbestos cement.

 

[Papphammar666]

House from 71 with wooden frame and nailed drywall

 

[GoC]

But asbestos indoors to cover an entire area can't be common.

Oh yes.
Often used as fire insulation in the basement ceiling, in houses with wooden beams.

 

[DaDolly]

Yes.
Often used as fire insulation in the basement ceiling, in houses with wooden joists.

Yep. Found in the boiler room, as well as in the pantry and the corridor between them. The Masonite appears to have been screwed on top of these at some point.

Yep. Found in the boiler room, as well as in the pantry and the corridor between them. The Masonite appears to have been screwed on top of these at some point.

Got

When I was house hunting, I dismissed (at least) one house among others because it had Eternit throughout the basement ceiling and another that had it in the garage ceiling. I've gotten the impression this was common in the 50s, 60s, and a bit into the 70s.

But I agree that it doesn't look like Eternit in the pictures here.

okay, thankfully I haven't encountered that.
In my house from -62, it was gypsum in the boiler room and also in the laundry room, fortunately.
Was the Eternit cheaper than gypsum? Or were gypsum boards quite new then?

 

[GoC]

Got

ok, fortunately I haven't encountered it.
In my house from -62 there was plaster in the boiler room and also in the laundry room luckily.
Was asbestos cement cheaper than plaster? Or were plasterboards relatively new then?

Asbestos cement was an excellent durable, weather-resistant, and fire-protective material. By the way, it is still just as good a material when it remains in its designated place.

 

[DaDolly]

Eternit was an excellent durable material against weather and wind, and fire-protective. It is still just as good a material when it remains in its intended location.

I'm with you on all of that, but I was more curious about the pricing during that time compared to plasterboard.

 

[Magnus E K]

Also have plasterboard (in almost the entire basement, the rest just rough lumber) in the basement ceiling of the house from '63 that I actually bought and now live in. Unfortunately, I don't know anything about the price range or what made one choose one or the other. A disadvantage of the plasterboard is that the paper can mold. It also steals an extra half centimeter of ceiling height compared to the thinner asbestos boards.