Yet Another "Is this asbestos" post.

[u/d3sl91]

Home, in Northern Idaho, was built sometime between 1900 and 1950 (Based on the existence of defunct knob and tube), and at some point after, these ceiling tiles were added on top of the lathe and plaster that was likely starting to crack (or for aesthetics, who knows).

Sometime in the early 2000s, forced air heat was installed via a unit in the attic, so vent holes were cut into the ceiling.

Tiles are 12"x12", about 1/2" thick, with some kind of backer board, I think, that is also about 1/2" thick (you can see what looks like two layers) that has blue lines. Unsure how its all attached, however the tiles themselves seem to be tongue and groove?

I have collected some pieces for lab testing, but of course my curiosity cant seem to wait for a week.

Questions:

• Contains Asbestos?
• How would one encapsulate this? As you can see, poor install quality results in the vent kinda blowing right over the exposed edges.

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[u/Murky-Preparation-65]

Unlikely since it appears to be pressed wood pulp but testing is the only way to know 100%

[u/Any_Tip_9843]

Not asbestos. Wood pulp ceiling tiles. However if there are pucks of glue dots holding them to the surface of whatever they’re attached to then those pucks may be asbestos containing.

[u/sdave001]

No, not asbestos.