Seasonal Window Maintenance Guide for Minnesota Homes

December 20, 2024 • By Lily Park, Operations Manager

Minnesota weather is no joke. From freezing winters with polar vortexes to hot, humid summers — our windows take a beating year-round. As window cleaning professionals serving the Twin Cities since 2012, we've seen it all: fogged seals, cracked glass from thermal stress, rotting frames, and water damage that could have been prevented with proper seasonal maintenance.

This guide will walk you through what to look for and what to do each season to protect your windows and your home.

Spring: The Recovery Season

After a long Minnesota winter, spring is when your windows need the most attention. Ice dams, snow accumulation, and freeze-thaw cycles can cause significant damage that you might not notice until the snow melts.

What to Do:

• Inspect for damage: Check frames, seals, and glass for cracks or gaps caused by thermal stress
• Clean thoroughly: Remove winter grime, salt deposits, and debris
• Check weatherstripping: Replace any damaged or worn weatherstripping before summer storms
• Service AC units: Ensure window AC units are properly sealed or removed

Summer: Heat, Humidity & Storms

Minnesota summers bring humidity that can be brutal on window seals and frames. Thunderstorms with high winds can also cause damage from flying debris.

What to Do:

• Watch for condensation: Excessive interior condensation can indicate humidity problems
• Clean screens: Remove and clean window screens for better airflow
• Inspect after storms: Check for damaged glass or frames after severe weather
• Seal gaps: Any gaps between windows and frames should be sealed

Fall: Preparation is Key

Fall is the most important season for window preparation. Getting your windows ready for winter can save you thousands in repairs and heating costs.

What to Do:

• Schedule professional cleaning: Clean windows before winter means more winter sunlight
• Inspect and repair: Fix any issues before freeze-up
• Check locks and hardware: Ensure windows close and lock properly
• Trim trees: Cut back branches that could damage windows in ice storms
• Consider storm windows: They add insulation and protection

Winter: Protection & Monitoring

Once winter hits, there's not much you can do externally. But winter is when interior window problems become most obvious — and most costly if ignored.

What to Do:

• Monitor condensation: Excess moisture inside windows can freeze and cause damage
• Check for drafts: Feel around windows for cold air infiltration
• Keep snow cleared: Don't let snow pile up against windows
• Watch for ice dams: These can cause water damage above windows
• Address problems quickly: If you see fogging between panes or drafts, call a professional

Signs of Trouble to Watch For

Knowing when to call a professional can save you money in the long run:

• Fogging between panes: Indicates failed seal — the window needs replacement
• Condensation on interior: Could indicate humidity problems or failing seals
• Drafts near windows: Weatherstripping needs replacement
• Difficulty opening/closing: Hardware may need adjustment or lubrication
• Visible damage: Cracks, chips, or rotted frames need professional attention
• Water stains on walls: Indicates leaks that can cause major damage

When to Call a Professional

Some window maintenance is DIY-friendly, but certain situations absolutely require a professional:

• Any glass replacement (especially multi-pane windows)
• Seal repairs or window frame replacement
• Multi-story window work
• Any damage from storms or accidents
• Persistent condensation or fogging between panes