Pyrobloc

Grallert

I think that's how they spell it. I've seen this in a few older buildings but it's been a while. I ran across it again in a wall above a hung plaster and lathe ceiling here at school. The student in this room asked about asbestos. I couldn't answer because I don't know. I did some googling and came up dry.

If I recall from a bit of research years ago it does not contain the A word. This building was built in 1923 so? Does anyone have a better answer? I will send it out for testing.

delcrossv

Pyrobar? No It's gypsum, not asbestos.

See:

https://www.fireengineering.com/fire-safety/construction-concerns-pyrobarreg/#gref

Grallert

Yes Thank you I was just up there again and had a look. Pyrobar. Thank you for the reply.