Prevent Water Damage. In most parts of the country, summer brings heavy rains and thunderstorms, so protecting your house against water damage may be one of the most important things you do. Start with your foundation; seal cracks and repair leaks. Build up dirt or place grates outside your house to direct water away from the foundation. If the dirt you currently have has settled around your house, water will start running toward your house.
Inspect Your HVAC. Before you blast your air conditioning, give your HVAC system a checkup. Change the air filters in your furnace so the system runs efficiently. (Ideally, you should check or change the filters every month.) Clear away grass, leaves, and debris from the condensing unit outside, which could cause it to malfunction.
Defend Against Unwanted Pests. Bugs and other pests are just as ready to get moving in the summer months as we are, but unfortunately, they don’t always stay outdoors. Prevent them from entering your house by ensuring it’s properly sealed. Check the caulking around doors and windows, both inside and out. Replace cracked or worn weather stripping on doors (this may lower your energy bills, too).
Trim Trees and Shrubbery. While you’re inspecting your foundation, roof, and gutters, take a look at the trees and shrubs on your property. Cut any tree limbs or shrubs that touch your house. Over time, the wind will cause these to rub on your roof or siding, resulting in serious damage that could be costly to repair.