Hello
I am building up a floor in a small cabin.
For 60 years, mice have been having a party in the crawl space, and now I am trying to prevent this.
Where can you buy slaked lime?
How much slaked lime should be spread in the crawl space?
Is there a reasonable alternative?
Sprinkle juniper twigs in the crawl space under the insulation?

Anyone with experience in this?
 
Claes Sörmland
It is called Murkalk E in the trade.

Just how effective it is in the long run, I don't know. The slaked lime absorbs moisture from the air over the years and then forms limestone, which is not nearly as caustic.
 
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Workingclasshero
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Build the floor mouse-tight, it can be done. I rebuilt the entire floor in my log cabin myself and haven't had mice there since. But it's about not leaving any gaps more than a few millimeters. I can imagine that lime also has another disadvantage besides the one Claes mentions above, and that is that dry rot needs a base to neutralize its acid formation. So spreading lime provides one of the three components for the dreaded dry rot; moisture, wood, and lime.
 
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Workingclasshero and 2 others
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