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Rat or mouse breaking in

  • Last Updated:
  • Jul 15th, 2020 1:09 pm
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[OP]
Deal Addict
Nov 26, 2008
1051 posts
724 upvotes
GTA

Rat or mouse breaking in

Hi everyone,

My neighbour came over asking for some advice to get rid of an entry point for a rat.

I suggested spray foam but the pest chewed through it.

I’m thinking some metal drip edge or chicken fence to cover it up.

Any other ideas?
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7 replies
Deal Fanatic
Oct 18, 2004
5200 posts
1681 upvotes
Wat
Stuff it with copper wool instead.
Sr. Member
Aug 29, 2019
995 posts
453 upvotes
Silicone (for window and door - outdoor use) caulking.
Deal Fanatic
Oct 26, 2008
6838 posts
2613 upvotes
BC
bostonontario wrote: ........
I suggested spray foam but the pest chewed through it.

I’m thinking some metal drip edge or chicken fence to cover it up.
......
Maybe there was one or more of them still inside when the foam was installed? They will do anything to get out when they need to.

Otherwise, it should have been a deterrent to entry, but metal in some form or another usually the best solution. But tiniest gaps have to be sealed off.
Deal Fanatic
Dec 27, 2007
5579 posts
2961 upvotes
Steel wool with something sticky to keep it in place but it must be pretty determined if it still ate through the foam
Deal Expert
Jan 27, 2006
20506 posts
13884 upvotes
Vancouver, BC
Standard 'metal' wool isn't going to do much...

There are two possible paths for the furnace exhaust:
1. Get a custom made metal flashing installed; OR
2. Using metal screen material (much thicker than steel wool) and spray foam to create a multi-layer 'sandwich' of screen material, and spray foam. Ideally, you remove the 4 screws, pull the pipes and the bracket out a bit, line the hole with the screen material, use a bit of spray foam to hold the screen material in place, push another layer of screen material into the spray foam, re-attach the pipe bracket and the screws (hopefully the screws will screw into the screen material as well to help hold it in place, foam the gap, and squeeze a strip of screen material into the gap.

For the A/C entrance, you can do something similar to 2 above - remove all of the existing spray foam, squeeze some metal screen material into the hole (don't fill it), spray foam to seal, then push another layer of screen material into the spray foam (you can cut this last piece so that it just goes over the hole and covers the cables slightly. You might want to use the screen material to wrap the A/C pipe as it looks like the rats have been eating the insulation on those pipes as well.

NOTE> Ensure that you get the metal screen material and not the common nylon one.
Deal Guru
Jan 25, 2007
11944 posts
7118 upvotes
Paris
Dow makes a pest foam. Usually not with insulation foam in box stores but somewhere else weird.
Deal Fanatic
Nov 21, 2013
8028 posts
9003 upvotes
Montréal
craftsman wrote: Standard 'metal' wool isn't going to do much...

There are two possible paths for the furnace exhaust:
1. Get a custom made metal flashing installed; OR
2. Using metal screen material (much thicker than steel wool) and spray foam to create a multi-layer 'sandwich' of screen material, and spray foam. Ideally, you remove the 4 screws, pull the pipes and the bracket out a bit, line the hole with the screen material, use a bit of spray foam to hold the screen material in place, push another layer of screen material into the spray foam, re-attach the pipe bracket and the screws (hopefully the screws will screw into the screen material as well to help hold it in place, foam the gap, and squeeze a strip of screen material into the gap.

For the A/C entrance, you can do something similar to 2 above - remove all of the existing spray foam, squeeze some metal screen material into the hole (don't fill it), spray foam to seal, then push another layer of screen material into the spray foam (you can cut this last piece so that it just goes over the hole and covers the cables slightly. You might want to use the screen material to wrap the A/C pipe as it looks like the rats have been eating the insulation on those pipes as well.

NOTE> Ensure that you get the metal screen material and not the common nylon one.
+1 for the customised flashing

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