Published: March 1, 2025 | Closer Look Home Inspectors · InterNACHI Certified · Mankato, MN

Preparing Your Home for Minnesota Winter

By Closer Look Home Inspectors | (507) 721-3820

Minnesota winters rank among the harshest in the nation. Mankato regularly experiences sub-zero temperatures, heavy snowfall, ice storms, and wind chill values approaching -40 degrees F. Thorough preparation protects your home from damage and keeps your family safe and comfortable.

Insulation and Air Sealing

Heat loss drives both energy costs and ice dam formation. Prioritize these areas:

• Attic insulation: Target R-49 to R-60. Most older Mankato homes fall well below this level.
• Rim joist insulation: The area where the floor frame meets the foundation is a major heat loss point in basements
• Air sealing: Seal gaps around plumbing, electrical, and HVAC penetrations through exterior walls and the attic floor
• Weatherstripping: Replace worn seals on all exterior doors. Test by closing a dollar bill in the door; if it pulls out easily, the seal is insufficient

Our FLIR thermal imaging precisely identifies where heat is escaping, allowing targeted improvements rather than guesswork.

Windows and Doors

• Install storm windows or interior window insulation kits on single-pane windows
• Caulk any gaps between window frames and siding
• Adjust door thresholds to eliminate gaps at the bottom
• Consider window film for additional insulation on older windows

Plumbing Winterization

• Insulate vulnerable pipes: In crawl spaces, garages, and along exterior walls
• Disconnect and drain outdoor hoses: Close interior shut-off valves to exterior faucets
• Locate main shut-off: Know how to quickly shut off water if a pipe bursts
• Insulate the water heater: A tank blanket reduces standby heat loss during cold months
• Drain outdoor irrigation: Blow out sprinkler lines before the first hard freeze

Heating System Readiness

• Complete professional furnace service (see our furnace prep guide)
• Test all carbon monoxide detectors and replace batteries
• Stock extra furnace filters for winter replacements
• Consider a maintenance agreement for priority service during emergencies
• Have the fireplace and chimney inspected if planning to use them

Roof and Exterior

• Clean gutters thoroughly before the first freeze
• Repair any loose or damaged shingles, flashing, or vents
• Trim tree branches hanging over the roof or near power lines
• Verify attic ventilation for ice dam prevention
• Check foundation drainage and correct any negative grading

Emergency Preparedness

Extended power outages are possible during Minnesota blizzards:

• Consider a whole-house or portable generator with proper outdoor ventilation
• Keep flashlights, batteries, and a battery radio accessible
• Store 3 days of water and non-perishable food
• Have a secondary heating source plan (fireplace, space heater with proper safety measures)
• Keep ice melt and a snow shovel readily accessible

A professional home inspection before winter identifies vulnerabilities in your home's defenses against cold, snow, and ice.

Contact Closer Look Home Inspectors at (507) 721-3820 or get your instant quote below.