| "and since all they installed outside my house was a 'hole' and a ton of stones, that should in theory make it empty faster! But even after it's dry, i hope the RH goes down or I'll be upset."
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I explained way back to an earlier post of yours that, what you require is a French drain.
Your yard is covered with concrete - it needs to be removed along the upper side of your house and the wall waterproofed.
I said to remove the back fill along the wall to a depth of four feet, either waterproof the wall using paint or better still fix plastic sheet along it, then refill the hole with clean stones. This French drain should be continued down hill to enable the ground and surface water to move round the house into the front lawn.
I have tried to make the point that high humidity does not matter!
What matters is the relationship between the air temperature and the wood temperature.
If the wood temperature is lower than the dew point/temperature of the air then the humidity in the air will settle on the wood.
As long as the wood temperature is higher than the air temperature the wood stays dry.
You measured the temperatures in your crawl space, the wood is warmer that the air.
This means that the wood stays dry.
When winter comes the wood will be much warmer than the air - there is no way the wood can become wet from the humidity in the air.(while you heat your home)
Why not buy a temperature gauge with a built in humidistat and two external wireless sensors that you can access at any time from your house.
Fix one sensor to the sub floor/joist and dangle the other from one of the joists on a piece of string.
This will enable you to see how warm/cold/humid the air is under your house.
It will also enable you to see how warm/cold the joists and sub floor are.
Better still buy a Weather Station with external wireless sensors that you can connect to your computer, then you can see exactly what happens 24 hours a day, you can see how the humidity and dew points change during the night.
Then you will know exactly what happens.  |