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adrienne_donovan1

How do you know the extent of mouse infestation?

6 years ago

We just bought an old farmhouse, planned on doing some extensive renovations but (surprise, surprise) have stumbled upon a few roadblocks. One issue was water, which we’re pretty sure we know what to do to get a handle on it. The other thing that just came up was mice.

Being an old farmhouse, sure, I suppose some would expect there to be mice? We didn’t really consider it, saw no evidence of them before purchase and neither did our home inspector. However, we recently noticed some brown staining on a first floor ceiling, close to where a cover plate (assuming from an old fixture or something?) was in place, so my husband took the plate off the ceiling. We were sickened to see on the other side was insulation, covered in mouse excrement!

Our questions are...could the the brown staining from mouse urine? If they are in the ceiling, are they EVERYWHERE?? And most importantly, if they have pooped/peed on insulation, do we need to rip out all the walls/ceilings and replace the insulation?? We are very much concerned with air quality because we have a baby and my husband has allergies.

We have already contacted a few extermination companies and they seemed to think that setting traps/poison inside and outside would take care of the mouse issue, in addition to plugging up entry holes (which will probably be difficult because of the stone foundation). Are we doomed to be chasing away/killing mice for the rest of our lives? Is there real health concerns with having either dead mice or their excrements in the walls/ceilings? Should we just put the house back on the market (not completely kidding here!)?

Please, please help. We’re trying to stay hopeful about this property, it’s an ideal location, the land is beautiful, and we thought we could bring the house up to snuff, but with all these issues adding up, we’re really doubting the feasibility of making this house a safe and comfortable home for our family. :(

Comments (6)

  • 6 years ago
    last modified: 6 years ago

    If you live in an area that has mice and your home has places where mice can “come inside” you may always have mice.


    Maybe you have post purchase remorse. It is what it is. Are you strong enough to deal with it?

    Rodents and people have lived together for almost forever.

    If you are unable to get over your “ick” factor, you may not enjoy living in a rural area, if so, then lose the drama and move.

  • 6 years ago

    Some types of mice can carry diseases which can be spread when their droppings and urine are disturbed, so it is wise to be cautious. I think one question is whether the infestation is active or not. Hantavirus can be in droppings and urine but it doesn’t live in them for long. Viruses need live cells to reproduce. A termite inspector once found rat droppings in our attic, and a worker found a rat skull under the house, but we haven’t had any evidence of live rats in either area. We haven't had a mouse inside since we sealed the cat door that the former owner installed. If your extermination company sets some traps they should be able to figure out how big a problem it is or isn’t. Blocking any possible entrance is also important.

  • 6 years ago

    I've lived in 5 country houses, from early 1800s to 1960s vintage. They all had mice at one time or another. They love to burrow in insulation and make nests. They love pet food. I find liberal use of spring traps controls them adequately, no professionals required. Don't leave food sitting out for your pets. Sealing walls is a good idea but it is very difficult to seal all entryways into the house.

  • PRO
    6 years ago
    last modified: 6 years ago

    Ah, mice! We had an 1840 half-Cape with a root cellar. The foundation was original but in very good condition. Mice, mice and more mice, but were contained in that one area, so were easy to control. The problem was when one passed on to mouse heaven, the remains stunk for days. Usually, it happened during the holidays. Nothing like dead mouse and roasting turkey to whet the appetite.

    Our present house is our downsize. When we purchased it we knew renovation was in order, big time. It was winter, house was empty and thermostat set low. After inspection and closing we came back in, turned up the heat, and left. Next day, when we opened the door, both of us almost threw up. I’ve never smelled anything quite like it and hope never to again. The entire insulation in the house was loaded. Yes, there was drama !!!! Well deserved, as mice are filthy little creatures.

    End result, we hired a company that “suits up”, removes all insulation and then “power washes” the walls with disinfectant.



    Keep in mind this is AFTER my builder removed every wall in the house. Total clean-up cost for 1300 sq feet was $18,000.00.

    We had no choice. We couldn’t walk away from the house and if we put it back on the market, we would be legally responsible to disclose the problem.

    Upside? While everything was open, we had all the electrical redone, insulation, plumbing, etc. It is like a new home.

    4 times a year a pest control company comes and checks the traps. We have never had another problem and it has been 6 years. Long run, it was worth it. The house is great, tight to the weather and we love it.

    And yes, the brown stain is mouse urine and the grease and dirt from their fur.

  • 6 years ago

    I'm working with a wildlife removal company to try and rid my house (mostly the basement these days) of mice. I've been working with him for about 1.5 years now. I didn't realize I had a mouse problem until my cats were chasing one down the hallway on the first floor. And then they got into my kitchen cupboards and drawers.

    My wildlife guy has put numerous traps in the basement, through the process of elimination we now have a general idea of where they are coming in. He also has gone around the outside of the house a couple of times trying to block possible entrances.

    Unfortunately, they seem to be coming in under a sunroom that was once a screened in porch that was turned into a 4 season sunroom. There is no crawl space underneath, no way for a person to see under it, but that's where we trap them coming into the basement.

    He was just here last week, and was outside trying to block more entrance spots. Next time we need to have a conversation about what to do if we can never completely stop them.