Seal air leaks around windows, doors, vents, and pipes
Add weatherstripping to doors and operable windows
Apply caulk to gaps and cracks in walls, trim, and siding
Install attic insulation to the recommended R-value
Insulate exterior walls
Insulate basement walls and rim joists
Add floor insulation over unheated spaces
Use insulated curtains or thermal blinds
Upgrade to double- or triple-pane windows
Use window film for added thermal resistance
Insulate and seal ductwork
Insulate hot water pipes and the water heater
Install door sweeps on exterior doors
Cover unused fireplaces and chimneys
Add insulation to the garage if it connects to the home
Replace worn insulation with new material
Check for moisture damage and repair before insulating
Use radiant barriers in hot climates
Improve attic ventilation to support insulation performance
Hire a professional energy audit for problem areas