Chemical barriers can be quite effective in sealing up the home in that they kill, reroute or repel the pests on the outside before they come in. Well placed treatments can make up for areas they can’t be sealed completely such as garage doors, under decks or tiny unseen cracks. Treatments can also extend out further than the house to the source itself like a fire ant mound in the yard or a Box elder tree that would be too costly to cut down.
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