In the final hour of "At Home with Gary Sullivan," Gary tackles two pressing home improvement questions. First, Tom calls in about a small stucco patch on his home, wondering if it's safe to repair in the cooler temperatures. Gary offers expert advice on the best products to use and the ideal temperature range for the repair. Next, Paul shares his struggle with low humidity in his home, and Gary recommends a whole-house humidifier to solve the issue. The episode also covers topics like biofilm buildup in hot tubs and the importance of maintaining drains.