Why are my windows sweating?

The Causes and Cures for Window Condensation

The Cause

Window condensation is caused when excessive moisture in the house condenses on your windows where the cold outside air meets the warm inside air.

The Problem

Window condensation can cause peeling wallpaper and paint, warped hardware and black mold.

The Cures

There are things you can do in your home to reduce window condensation.  These tips may help, but you may need to contact a professional HVAC company to assist in eliminating window condensation.


  1. Reducing the humidity inside your home
  • Install a hygrometer (a device that measures moisture levels in the air)
  • Use exhaust fans and vents
  • Take plants outside
  • Line dry clothes outside instead of running your dryer
  • Close doors when bathing and cooking
  • Use lids when cooking
  • Turn off any humidifiers
  • Use a dehumidifier


  1. Managing the Temperature
  • Keep your house at the ideal temperature
  • Install weather stripping on all exterior doors
  • Seal cracks around windows and doors
  • Install a heat recovery ventilator
  • Install storm windows


  1. Improving Ventilation and Circulation
  • Keep doors and windows open, when feasible
  • Open the drapes
  • Use fans to move air around
  • A professional HVAC company can install an air exchanger
Schneider Heating & Air Conditioning, Inc., is the leader in heating, cooling, ventilation and air quality products and services in the La Crosse Area. We have been serving the Coulee Region for more than 80 years.  Our technicians are highly and continually trained utilizing the most sophisticated HVAC (Heating, Ventilation and Air Conditioning) technologies and equipment. All of the service technicians are NATE certified.  North American Technician Excellence is the largest non-profit certification organization that is governed, owned, operated, developed, and supported by the HVACR industry. And as an alliance of industry-recognized partners, you will have a greater peace of mind knowing we are sending out the right person for the job!  At Schneider Heating and Air Conditioning INC. we pride ourselves on amazing customer service!