How to keep mice, critters from getting into duct insulation that is under a house that is on piers.

How do you keep mice, critters from getting into duct insulation that is under a house that is on piers?

Views: 210

Reply to This

Replies to This Discussion

A former owner where I did some repair work had evidently tried to keep the rodents out by nailing a flattened tin can over their entrance. Mice or rats I never determined, but they chewed right through that makeshift cover and continued to use the rafters as they wished. 

At a minimum I would recommend T&G plywood and hope they wouldn't be able to detect any warmth from above.  When the cold season comes they would make short work of 3/4" plywood.

There are some concrete based 4'x8' panels that besides being heavy might be better at keeping them out.  Of course mice will be a lot easier to stop than their larger cousins.

An abundance of traps to eliminate them before they start chewing their way in is always a good defense.  I try to avoid poisons and local domestic animals might be affected.

Bud

If your ducts are below the bottom sheathing I would wrap them or box them in with metal.

The ducts are below the floor and above the dirt under the houses. It sounds difficult and expensive to wrap them or box them in with metal.

mothballs have worked for decades

You have to keep it out of their reach thus a Sealed crawl is the best option

For a vented crawl, make sure all your insect & rodent proofing is in place also; Using flex duct is not recommended, nor fiberboard, just metal ducts sealed with insulation on the outside. Better to have to make a few cosmetic repairs occasionally then let them get into the system.

If an existing issue, how are they getting in, in some cases it is from above & that needs to be dealt with also: http://blog.sls-construction.com/2010/safety-sunday-rodent-prevention

We have used hardware cloth (1/4" mesh wire) and then sprayed it with single part foam. I have heard of used cat litter (urine smell) sprinkled about and moth balls as other options.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Kurt Shafer replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Reading the Invisco description you will find that it is designed to be surrounded by cellulose to…"
12 hours ago
Glen Gallo replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Kurt, I think cost of operation is always a factor but I am not sure I would leave it just cfm.…"
13 hours ago

Paul DelVaglio just added their location.
(via Member Map)

14 hours ago
Paul DelVaglio posted a photo
15 hours ago
reflintorm replied to Jamie Kaye's discussion Flickering LED lights
"I think, Better to replace the dimmer switch if it is not recovered then once go through the…"
18 hours ago
Kurt Shafer replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Glen,  You are the first person who has ever told me they prefer lower CFM. What you left out…"
yesterday
Glen Gallo replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Tamarack has lower CFM than typical fans and has a insulated lid that automatically closes when fan…"
yesterday
Tom Conlon's discussion was featured

Whole House Fans - Love 'Em or Not?

I just searched this forum for "Whole House Fan", but I didn't find much about them (except …See More
yesterday
Tom White shared Brandon Walton's blog post on Twitter
yesterday
Brandon Walton's blog post was featured

12 Things Every Home Performance Contractor Should Have on Their Work Truck

Every home is unique and differs from the last. It would be a perfect world (from a project…See More
yesterday
Griffin Hagle replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
yesterday
Griffin Hagle replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Kurt, Whoops, looks like I got my links mixed up. Thanks for pointing that out. Here's the…"
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service