Are we sure they are rats? Contact DC DOH Rodent Control [email protected] Office: (202) 535-2636
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If they are mice, they can’t help. I would suggest making small holes in the ceiling, baiting the holes then sealing them. You might get a dead rodent smell but should stop mice. Of course a more permanent solution is seal holes but if you are in row house you are bound to have floor joists through the brick walls that seperate your houses and when they made the holes for the joists they usually didnt bother sealing them leaving room for mice to travel between the houses. So even if you sealed your outside, if you neighbors don’t you are at risk.