Re: [papercreters] Long Term Moisture Monitoring

I suppose you have thought this through, and not to rain on your parade as it were, but do postage scales measure hundreths of grams?   Is the density of water vapor in your papercrete plugs the same as its density in the straw?   Do you have a way of converting 1 gram of additional weight in your plugs to relative humidity?   Because at some point you will have to talk to the rest of the world to communicate your findings.

 

Wouldn't it be simpler and easier, assuming you want to use holes in the straw, to periodically insert humidity sensors?

 

Neal  

 

-------------- Original message --------------
From: "slurryguy" <slurryguy@yahoo.com>

Papercrete may have an advantage over strawbale when it comes to monitoring moisture levels. Strawbale has struggled for years to come up with moisture sensors that are effective, accurate, and durable.

My plan is to not try to get fancy at all. I plan to drill a series
of holes into my walls and then fill the holes with a perfectly sized papercrete plug going all the way into the wall. The plugs will all be carefully sized to exactly fit the hole and all the plugs will weigh exactly the same amount. I will cover each plug with an access panel. It will be a simple matter to remove the panel, pop out the plug and weigh it on an accurate postage scales. Any changes in sample weight over time will be due to moisture content.

The concept may not be high tech, but it will be extremely reliable over the long haul, and be extremely accurate. The technique also lends itself well to visual inspections for other potential issues, like insects or mold and such things. It also is extremely inexpensive.

It will be important to seal the inside and outside surface well, so that core sample gets it's moisture from the surrounding wall, not by leakage from the hole to the outside.

--- In papercreters@yahoogroups.com, "ElfNori" <elf@...> wrote:
>
> Also, it might be worth embedding moisture sensors in each walls at the bottom inside the waterproof layer and directly above that sensor in the regular papercrete part of the wall. I don't want to spend a lot of money on this, but I think the sensors would tell us a lot.
>
> Dusty? Yes? No? Thoughts?
>
> ElfN
>

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