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Littlestone L
Littlestone May 18, 2011 10:23:42
Replying to StoneGloves

In one episode he was measuring the RH inside the Great Pyramid and, up near the top, it reached 80%. He shut it to visitors from then on.
Wow! High enough to start the stone delaminating?

S StoneGloves
StoneGloves May 18, 2011 10:47:35
Replying to Littlestone

Cracking - and there's ancient graffiti - red ochre brushwork - right at the top which shows that the builders weren't slaves. I don't understand relative humidity levels much. I can remember working in a cotton mill that had RH gauges - always stuck at around 90%.