Posted by Barbara on 12:47:11 8/16/2010 from 220.127.116.11:
We need your opinion on a carpenter ant problem. We have a carpenter ant colony inside the ceiling of a small dormer in a room over our garage. The roof construction is 2x4's and plywood covered with shingles. Under the 2x4's is a layer of 1/2" polyiso which is covered by 1/2" drywall. At first we heard some chewing sounds, then when my husband pounded on the drywall he heard a rustling sound which he thinks might be thousands of ants. We tried drilling holes and applying Timbor dust into the space one week ago, but my husband still hears a lot of rustling when he pounds on the drywall. We are sure that it is carpenter ants because some tried to crawl out of the holes we drilled. Before we discovered the nest, we had seen carpenter ants in the kitchen and outside in front of the garage. We put Amdro baits in both places, saw lots of ants go to the bait stations, hundreds outside in front of the garage. Now,we don't see any ants in those spots. They are totally gone. We have never seen any ants in the room with the dormer, we only saw them in the kitchen, and now they are gone from there. We just hear them inside the ceiling of the dormer. We are wondering how they are getting food. Do you have any suggestions? Should we try dusting again or is this beyond a do-it-yourself remedy?
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