I've been hearing scratch scratch scratch in the walls and in the ceiling for weeks now. Just once in a while, but enough to drive me crazy. Invaders! I know what it looks like inside the walls and ceiling since fixing up the place. Walls from the outside in, cementitious panels siding, old cedar clapboards, vertical studs with haphazard tar paper vapor barrier and dead air space, old 3/8 sheetrock, new 3/8 sheetrock, inside living area.
Ceiling from the inside out, or bottom up, 3/8 sheetrock, 3" foam panels, furring strips, poly vapor barrier sheeting, 1/2" foam panels; 2x8 rafters supporting flat plank roof, many layers of old asphalt roofing.
There's a crawlspace behind the garage area, under my living areas, with a dirt floor.
I took a 1/2" spade bit and punched holes in the walls where I hear the rodent scratching, in a few places; and injected household ammonia into the wall and ceiling cavities, to try and drive them out with the ammonia fumes. I don't think this is being very successful, and it's making a lot of spackle work for myself. This is my old shop, and has had rodent problems over the years. I can't find where they're getting in and don't know if it's mice or maybe chipmunks. From the garage area, I can get right up to the ceiling and look the length of the rafters back to the back of the building. The ceilings are high enough so I did that for visual inspection reasons. More so for roof leaks than rodents.
I just set a few regular victor mouse traps with peanut butter, and threw a couple dozen packet baits up in the rafters, and in the crawlspace. Gotta go to war here. Hate to use poison, but I'd rather smell death for a few days than let them run rampant.
I saw electronic repellers at HDepot, don't have much faith in them.
I heard of an old Greek recipe, 1 part flour, 1 part sugar, 1 part plaster of paris. Put in a bowl and put a bowl of water nearby. They eat the plaster, get thirsty and then the plaster hardens inside them.
I want to keep at this before it gets any colder.
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