Home Maintenance Guide

How Can You Tell When Windows Need New Caulk?

Inspect exterior sealant and interior weatherstripping at least yearly. Repair material that is cracked, separated, missing, brittle, or allowing air or water intrusion, while preserving intentional drainage and ventilation openings.

Seal Cracks and Gaps in windows
Correct Home Care Helper

Seal Cracks and Gaps in windows

Cracks and gaps in doors and windows can have a dramatic impact on your utility bill. They could even give you the sniffles. Seal those cracks and gaps in windows and doors with caulk or weather stripping.

Difficulty: EasyTypical cost: $21–$150Suggested frequency: YearlyPriority: High

How often should caulk be replaced?

There is no universal interval. Product type, joint movement, sunlight, moisture, surface preparation, and installation determine service life.

Should gaps be sealed inside or outside?

The correct layer depends on wall and window design. Exterior sealing must not block weep holes or trap water.

What causes drafts?

Failed weatherstripping, frame gaps, sash alignment, cracked glazing, surrounding wall leaks, or pressure differences may contribute.

When is window replacement necessary?

Replacement may be justified by failed insulated glass, rot, structural damage, poor operation, or performance goals—not merely one repairable air leak.

Make It Easy to Remember

Turn this advice into a simple home-care routine.

Correct Home Care can email you when it is time and keep the important details handy when you need them.

General guidance reviewed against U.S. Department of Energy. Follow product instructions, local requirements, and qualified professional advice for your home.