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Worth replacing fiberglass insulation with blow-in cellulose to keep mice away?


diylifer's Avatar
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Join Date: Feb 2013
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02-05-13, 10:00 AM   #1  
Worth replacing fiberglass insulation with blow-in cellulose to keep mice away?

We're in the process of having our attic re-insulated and the contractor was going to blow in cellulose on top of the existing fiberglass batt. But, we know we have a bit of an issue with mice in the attic and even though we never actually see them, we hear them and can see the "presents" they leave behind.

I read that mice prefer fiberglass over cellulose because the cellulose has borate which mice don't like. Is this true? Has anyone replaced their FG with cellulose and noticed a decrease rascally varmint activity?

 
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Northern Mike's Avatar
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02-05-13, 10:31 AM   #2  
Not to stray too off topic from your question, but have you looked into removing the mice problem?

Repurposing insulation can be the least of your problem with mice. They also like to repurpose electrical cable insulation (fiber optic cables, etc).

I'm not too sure about mice not liking the contents of blowin vs fiber bat. I would know that blow-in would be less noticeable if some was used for nesting.

 
Bud9051's Avatar
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02-05-13, 10:41 AM   #3  
Mike makes a good point.
In addition to the droppings you see, mice like to build a potty spot or two or three and use them for most of their business. When you find one, you will definitely be glad you removed it, disgusting.

Also, air sealing can be done more easily while the attic is empty, including gaps around plumbing and electrical which those mice found long ago and use to access more of your home, sometimes all of your home.

This is a real nice opportunity to start fresh and make better improvements.

Bud

 
diylifer's Avatar
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02-05-13, 11:47 AM   #4  
I definitely think it's best to start fresh and in order to air seal the attic, that fiberglass will have to come up. But, I figured since it's already up and I know we're going to find a nest or two AND since we're going with blown-in cellulose, why not just get rid of the fiberglass - donate or what have you - and begin anew. I'm also calling an exterminator, but wasn't sure if anyone had an experience with mice loving the fiberglass and dissing the cellulose.

 
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