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What are these walls made of?

Posted by autumpnereyn (My Page) on
Tue, Apr 29, 14 at 18:40

Hi all,

This house was built in the 1920's and has lots of character. One of my favorite features is the texture of these interior walls. As I look into sprucing the place up a bit, I really want to maintain this old world feel. When drilled into, it flakes apart easily and is kind of powdery. Does anyone know what this stuff is?


Follow-Up Postings:

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RE: What are these walls made of?

Beaver Board or Building Board was all I remember it being called, 60's or 70's and pretty sure has not been made in many years.


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RE: What are these walls made of?

We used to call it "stucco board" not to be confused with today's stucco board, made from cement. It was used for exterior renos to mimick stucco, but without its durability.


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RE: What are these walls made of?

I think it is a plaster It can be applied over concrete or cinder block, brick, stone or wood. It creates a durable, hard surface that conforms to flat or curved walls and ceilings. Plaster can last for hundreds of years, but has one major enemy that will cause plaster walls to become powdery.

Here is a link that might be useful: Modern House Plans


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RE: What are these walls made of?

It looks like beaverboard or blackboard--a fiberboard of wood bits and other scraps. Non hazardous I believe.


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RE: What are these walls made of?

It is impossible to be sure if this is a poorly textured wall finish or paint on a wood fiber board as others have suggested.

You need to do more work to find out if the material is worth saving. I would cover it with 3/8" GWB.


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