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Ants in Basement - how to patch entry way

  • Last Updated:
  • May 6th, 2021 1:10 pm
Sr. Member
Nov 10, 2003
917 posts

Ants in Basement - how to patch entry way

I've noticed ants in my basement and believe I've traced their entry into the house from a hole between the foundation and an exterior wall in my cold room. I can't really patch the entry from the outside easily as my house is below grade. So, to fill this hole from the inside, I was just going to fill it with concrete mix. Do I need to buy a bonding agent to add to the concrete or can I even just go with concrete sealant in a tube? Other options welcomed! Thanks!
3 replies
Jr. Member
May 15, 2020
135 posts
Thornhill ON
Polyurethane sealant in a tube will produce a flexible joint that will sustain some movement. Look at the instruction on the tube how big of a gap the product can fill. If the hole is fairly large then I'd use a cement based patching product.
Deal Addict
Mar 28, 2011
1570 posts
Maybe use diatomaceous earth and spray it in all the holes and weeping holes along your house and basement and in the cold room.

I had ants and it got rid of them after a few weeks

Reminds me now to prep the house and spray the DE again as a proactive approach