Home weatherization refers to the steps taken to protect a building from outside weather elements to improve energy efficiency and comfort and reduce energy bills. Common weatherization practices include air sealing, replacing windows, and improving attic, wall, and basement insulation. Weatherization measures needed for your home should be assessed following an energy audit and electrical system assessment.
- NOTE: Many times, air sealing and insulating may not be provided by the same contractor or in the same quote unless specifically requested. It is recommended that air sealing happens before insulating in most cases.
- Addressing likely insulation and air sealing needs and potential ventilation and window changes are necessary to ensure an efficient home envelope. Your contractor will be able to assist you in understanding your home’s specific needs for upgrading measures.
INSULATION
Insulation, usually consisting of cellulose, fiberglass, or mineral wool, provides your home with resistance to heat loss or gain by acting as a barrier between the interior and exterior. With proper insulation, you can reduce your heating and cooling costs and improve the comfort level in your home. There are numerous types of insulation including blown, blanket, reflective, loose fill, batting, or rigid. The application of each depends on your home.
Depending on the needs of your home in terms of comfort levels and moisture levels, it is important to understand which insulation is the best fit. The cost of insulation varies, so it is important to check with your local supplier and contractor for the cost and gather at least three quotes.
AIR SEALING
Air leaks are common in homes and although each is individually small, addressing leaks collectively can add up. Air sealing is the term used to refer to small measures that prevent the passage of air or vapor in your home or building in or out of the structure. Examples of types of air sealing include weather stripping for door frames and windows, caulking, foam gaskets behind outlets, foam sealants, and floor and rim joist sealing.
NOTE: Thorough air sealing can increase moisture content in your home and risk causing mold. Make sure your HVAC contractor assesses moisture and increases ventilation, if necessary.
WINDOWS
Contrary to popular belief, replacing older windows with higher efficiency models will not generally produce significant energy savings. If your current windows are broken or contain only single-pane glass, replacement is highly recommended as part of your home electrification process. In all other cases, though, window replacement is a high-cost, low savings investment in your home’s energy efficiency. Smaller, lower-cost additions to your current windows that could improve efficiency include weatherstripping, caulking, and adding window treatments, exterior shading, or storm windows are options to consider.
VENTILATION
Assuring your home has proper ventilation can reduce the risks associated with high humidity levels, such as mold, building structure damage, and higher concentrations of indoor pollutants. Excess moisture in your home can be attributed to multiple sources, including:
- Rainwater or groundwater leaks
- Plumbing leaks and spills
- Water wicking
- Infiltration of humid outside air through cracks and holes
- Unvented or poorly venter sources (dishwashers, baths and kitchens)
- Poor condensate drainage resulting from system deficiencies
Home ventilation can be provided by numerous mechanical and natural methods, such as air conditioning, natural ventilation (single-sided ventilation, wind towers, atrium ventilation), and air ducts. Checking for healthy moisture levels in your home should follow air sealing and other weatherization methods to ensure you aren’t locking in pollutants and harmful microbials. This can be done using a hydrometer, or by contacting a trusted contractor in your area.
RESOURCES:
Rebates and Tax Credits:
- Weatherization (insulation, air sealing, and ventilation):
- Low–income households: 100%
- Ohio Department of Development Home Weatherization Assistance Program (HWAP)
- Federal Income Tax Credits for Energy Efficiency:
- Home Builders: Section 45L New Energy Home Credit
No-cost repairs:
- Critical Home Repair – Habitat for Humanity
- STEPS to Stability – Council on Aging
- Home Repairs and Weatherization – People Working Cooperatively
- Call (513) 351-7921
For renters and landlords
Contractors:
- Find a Duke Energy backed contractor for home improvement and electrification needs at FinditDuke