Common signs include an attic that feels extremely hot on sunny days, upstairs rooms that are consistently warmer than the main floor, and HVAC systems that run longer in the afternoon. Moisture-related clues can include musty odors, damp insulation, condensation on roof decking or fasteners, and staining that suggests trapped humidity.
Carolina Skylights can confirm whether these symptoms point to an attic ventilation problem, and whether a Solatube solar attic fan is the right fix or if intake venting improvements should come first.