There are more suggestions on the energy.gov website.
SUMMER IS A GREAT TIME TO HAVE YOUR INSULATION WORK DONE . Often, it is easier to schedule, as most homeowners wait until fall.
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Cost-Saving Measures to Help Create a Comfortable Home
Heat Transfer in an
Proper insulation in your home will save money on heat and air conditioning. Attic temps in New Hampshire can reach as high as 149˚ in the summer. This would be like having pizza ovens running all day with only sheetrock between you and the heat. Outside warm air will move to cooler zones, like inside your house, causing you to run your air conditioning more.
Energy Insulation Specialists