Winterize Your Home: Inside and Out — 2026 Complete Guide
Part 13 of 22 in Winterize Your Home: Inside and Out. By Damon Fowler, Trends Kitchen & Bathroom Specialists.
Dry skin and fogged windows can occur in the same house. Indoor moisture varies by room and activity, while cold surfaces determine where condensation appears. Adding a humidifier without checking those conditions can improve one complaint and worsen another.
Measure before adjusting
Use a hygrometer to track relative humidity in representative occupied rooms. Note readings alongside outdoor conditions and visible condensation. A single reading beside a shower or directly above a humidifier does not represent the whole house.
The EPA recommends keeping indoor humidity below 60 percent and, when possible, ideally between 30 and 50 percent for moisture control. In severe cold, some windows or assemblies may require lower humidity to avoid condensation. Treat the EPA guidance as a general framework, then respond to the building and its occupants.
Situation: water runs down the bedroom windows each morning
Several conditions may contribute: indoor moisture, cold glazing, limited airflow behind heavy curtains, or a building defect. First establish whether the moisture is on the room side, between panes, or arriving around the frame.
Track overnight conditions, inspect nearby finishes, and review moisture sources. Reduce excess moisture and have persistent or localized problems assessed. Replacing a window may help in some circumstances, but it should follow diagnosis rather than serve as the default answer to every wet surface.
Remove moisture near its source
Use bathroom exhaust during bathing and continue it as appropriate for the room and control arrangement. Verify that the exhaust path reaches outdoors. Kitchen and laundry ventilation also affect moisture; equipment needs proper installation and a clear route.
A noisy fan that barely moves air deserves inspection of the entire path, including the duct and termination. A timer or humidity control can improve consistency, but it cannot compensate for a blocked or disconnected duct. ENERGY STAR highlights direct outdoor bathroom exhaust as an indoor-air-quality feature in certified homes.
Do not solve drafts by disabling ventilation
Fresh-air systems, combustion-air openings, and exhaust provisions have different purposes. Sealing an opening because cold air is noticeable can interfere with safe operation or moisture control. Ask a professional to identify it and evaluate the complaint.
A tighter house may need ventilation and combustion-safety considerations alongside air sealing. The objective is controlled air exchange, not a house with every opening plugged.
Humidifiers need maintenance, too
Follow cleaning, water-quality, and service guidance for the selected unit. Check for leaks and keep output appropriate to the building conditions. If windows, corners, or concealed areas show recurring moisture, investigate rather than simply wiping it away every morning.
Visible growth, persistent mustiness, and water-damaged materials call for attention to the moisture source and an appropriate cleanup or repair plan. Do not cover a damp area with paint or new cabinetry and consider the issue resolved.