A reader, Bob Welch, recently offered an answer to a letter from a woman who could not get rid of a strong odor in her house:
“We recently experienced the same problem. We tried an exterminator, who referred us to Baystate Wildlife Management Inc. in Canton, Mass. One of its employees came out and diagnosed the problem: a critter living in our crawl space. The next day a team installed screening at all entry points, sent their small terrier, Wellington, into the space to chase out any animals, and lastly, installed the final screen, which had an exit-only door. The company recommended ventilating the crawl space and guaranteed the work for two years. Seems to be working.”
The best part of this response, besides the good advice, was that the wildlife manager’s small terrier is named Wellington, a destroyer of Napoleon.
Now that it’s all gone, buy zinc strips (6 feet long and 6 inches wide) and insert them under the second-highest row of shingles parallel to the roof ridge, with 2 or 3 inches of zinc exposed. Then rain will wash bits of dissolved zinc down the roof, preventing future growth.