Weatherization Checklist for Homeowners

Attic (highest impact)

• Air seal can lights, top plates, plumbing chases, and the attic hatch.
• Weatherstrip and insulate the attic hatch (R-30+).
• Add insulation to R-49 minimum (R-60 in cold zones).
• Verify proper soffit-to-ridge ventilation.

Doors and windows

• Replace door sweeps and perimeter weatherstripping on all exterior doors.
• Add V-strip in window sash channels.
• Caulk window/door frames where they meet the wall.
• Apply shrink-film insulation kits in winter (cheap, effective).
• Install storm windows or interior storm panels for single-pane glass.

Walls and openings

• Add foam outlet/switch gaskets on exterior walls.
• Caulk around exterior wall penetrations (cable, dryer vent, exterior faucets).
• Replace dryer vent flap if it doesn't close fully.

Basement / crawlspace

• Spray-foam rim joists.
• Insulate cold water pipes.
• Caulk basement window frames.
• Weatherstrip and gasket the bulkhead door.
• Verify sump pump and downspout drainage.
• Crawlspace: install vapor barrier on dirt floor, seal vents in winter.

Ducts and HVAC

• Mastic-seal duct joints (foil tape only as backup, never cloth tape).
• Insulate ducts in unconditioned spaces (attic, crawlspace) to R-8.
• Replace HVAC filter every 1-3 months.
• Annual professional tune-up extends equipment life and saves 5-10%.

Water heating

• Insulate the water heater tank with a fitted blanket if R-value < 24.
• Insulate the first 6 ft of hot and cold pipes from the tank.
• Set tank to 120°F (lower if scalding is a concern with kids/elderly).
• Install low-flow showerheads (1.8 gpm).

Behavior changes (free)

• Drop the thermostat 3-5°F at night and when away.
• Use ceiling fans on low to push warm air down.
• Open south-facing curtains by day, close at night.
• Wash on cold; air dry one load/week.