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Ceiling?


DeborahM

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13 minutes ago, Go Solar said:

Tepetate is a natural substance mined locally that is used in many foundations to make a hard compacted base in the excavation, before footings are poured in concrete.     It is delivered by dump trucks and looks like a greyish/brown lightweight powder; once it is really tamped down hard it can become almost like rock again.

https://en.wikipedia.org/wiki/Tepetate

Thanks. Always learning.

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2 hours ago, slainte39 said:

 

 When did they stop calling it "jal"?

As far as I'm aware, jal is volcanic rock. It's very light in weight and is used above boveda ceilings instead of using gravel in the mix, so it's not so heavy. 

The tepatate used for foundation base would be decomposed granite, which packs down hard.

Two completely different materials.

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