Originally Posted by Hoser2eh
The best preventative is to plug all the holes where they can get in! I looked at where my plumbing, water connections and vent stacks entered into the trailer. Many of the holes are very large and would allow rodents to enter. Ive cut wood pieces to seal the holes as closely as possible, then I sealed any gaps with construction adhesive. Mice can actually chew through expandable foam, but they won't eat construction adhesive. An exterminator taught me that trick.
If you think bounce sheets will keep mice out, think again. Here's one in our old trailer, two years ago. The big pieces are whole cloves. Note the urine stain and droppings on the Bounce sheet.
Plugging the holes is the only sure way. We spent a day on it, plugging with pieces of brass scouring pad and sealing with Pestblock expanding foam
. We also replaced our "mouse hole" shore power port with a Marinco Parkpower twistlock system.
No mice from then until we sold the trailer a few weeks ago.