COVID-19 Update:

To protect the health of our staff and our customers, Efficiency Vermont offices are closed to the public. We have cautiously begun scheduling project related site visits when required. You can find more information on our safety protocols here.

We know that you need support in reducing energy costs now more than ever, and we will continue to launch new offers and programs over the course of the summer. In the mean time, our customer support team is available to help you remotely. Contact us at (888) 921-5990 or

Step 1 – Find the moisture

Homes and businesses can have many sources of moisture, among them bathrooms, kitchens, basements, and clothes dryers. Use a relative humidity (RH) meter to measure different areas of your home. A comfortable RH level is between 40 and 50%—although in winter, you may want it below 40% to avoid condensation on windows.

  • Check humidity levels to pinpoint trouble spots

  • Look for condensation, wood rot, mold, and peeling paint

  • Check for leaks in your basement, roof and attic, crawl spaces, closets, and windowsills

  • Examine sinks, tubs, and pipes for leaks

Step 2 – Reduce the moisture with these ten tips

  1. When you see condensation or pooling water, dry it promptly

  2. Use kitchen and bathroom fans to exhaust steam

  3. Caulk and weather-strip to keep out humid air

  4. Seal around tubs and sinks to prevent water from leaking into walls

  5. Use an ENERGY STAR® certified dehumidifier in laundry rooms and basements

  6. Seal off crawl spaces and cover dirt floors with polyvinyl sheeting

  7. Install gutters and adjust downspouts to divert roof runoff

  8. Install storm windows and storm doors in winter

  9. Add insulation to reduce heat transfer (which causes condensation)

  10. Improve grading around your foundation to divert groundwater

Step 3 – Improve ventilation

Ventilation removes stale, indoor air and replaces it with fresh, outdoor air. During warm months, you can open windows and doors—but the most effective ventilation comes from well-sized and properly installed fans. Besides removing moisture, clean bathroom fans and dryer vents are a must for occupant safety. Other fan options include kitchen range hoods, attic vents, and whole-house fans. For a complete assessment, hire a qualified contractor to look at your building’s ventilation, insulation, and air-sealing needs.


More questions? We can help.

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