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Residential Weatherization

Did you know the average family spends about one-third of its annual heating and cooling budget on air escaping their home through gaps, cracks, leaky ducts and windows? The good news is proper weatherization, or simple ways to protect a home from the elements, can help save energy and money by reducing the loss of heated and cooled air from inside the home.

Here are some weatherization improvements that can be made to help reduce energy cots and increase comfort:

  • Adding insulation in attics and ceilings, walls, crawlspaces and floors minimizes air loss throughout the home, which helps keep it warmer during the winter and cooler during the summer.
  • Air sealing also prevents air loss through gaps and cracks in the home and around ductwork. Proper air sealing ensures enough fresh air enters the home in the right places for healthy indoor air quality.
  • The Environmental Protection Agency estimates that homeowners can save an average of 15% on heating and cooling costs by air sealing their homes and adding insulation in attics, floors above crawlspaces and accessible basement rim joists.*
  • Replacing old windows can reduce heat loss and drafts, minimize noise and provide warmer window surfaces that improve comfort and decrease condensation.
  • Upgrading to ENERGY STAR®-qualified windows can help you save $71$501 on annual household energy bills depending on where you live and the type of windows being replaced.**

Energy-efficient weatherization measures save the homeowner energy and money year after year.

Program Description
BPA supports and utilities that offer weatherization programs and rebates to their customers. Check with your local utility to learn more about weatherization; However, availability and rebate amounts may vary by utility.
A Home Energy Audit is a good way to get a better understanding of how the whole home uses energy. An audit can help determine how much energy the home uses, where it loses energy, and which areas and improvements should be prioritized to make it more efficient and comfortable.
Air sealing
Air sealing measures value the incremental improvement of air leakage in a home. A contractor may take a whole-home or comprehensive approach using Blower Door equipment to measure the difference before and after air sealing. A contractor may also take a prescriptive approach to determine high-need areas and measure benefit, based on the square footage of the area where air sealing is performed.
Insulation measures include attic, floor and wall insulation calculated by the incremental benefit between existing and ending insulation at projected completion. This is based on the R-value of the insulating material. An insulating material's resistance to heat transfer is measured in terms of its thermal resistance, or R-value. The higher the R-value, the greater the more effective it is at insulating the areas of your home.
Prime window and patio door replacement
Installing energy-efficient windows and patio doors helps eliminate drafts, cold spots and overheated spaces. Keeping your home's temperature consistently comfortable also helps save money on energy bills.
  • This measure is only available for pre-existing windows and patio doors that are:
    • Single paned
    • Double paned, with a metal frame only.
  • U-value measures how well the window insulates. Check with your local electric utility for these incentives. Please note: incentive availability may vary by utility.
    • Windows with a U-value of 0.30, 0.22 or better.
    • Patio doors with a U-value of 0.35 or 0.30.
Exterior insulated doors
An uninsulated or substandard exterior door can contribute significantly to air leakage and can waste energy. Weather stripping can reduce energy loss due to air leakage, but you may also consider replacing your door with a new, ENERGY STAR-qualified insulated door.
Low-E storm windows
Compared to clear glass storm windows, ENERGY STAR-certified storm windows use low emissivity or low-e glass to improve the energy performance of a home. These windows allow the right amount of heat from the sun through windows to keep a home warm in the winter, but also cool in the summer.
  • Pre-existing windows must be either:
    • Single paned without existing storm windows.
    • Double paned, metal frame only, without existing storm windows.
  • The new low-e storm window must be an ENERGY STAR-qualified product.
Low income energy-efficiency measures
BPA supports utilities that provide energy-efficiency services tailored for low-income customers. Low-income measures may include:
  • Insulation
  • Prime windows and patio doors
  • Low-E storm windows
  • Exterior insulated doors
  • Ductless heat pumps
  • Air source heat pumps
  • Heat pump water heaters
  • Smart thermostats
  • PTCS or prescriptive duct sealing
  • Air sealing

Contact your local utility to see if you qualify for these services.

​Program Documents and Resources

Please see BPA's Implementation Manual for updates to requirements, specifications and current BPA incentive amounts. All weatherization measures in single-family and manufactured homes must be installed according to BPA residential weatherization specifications.

Optional weatherization field tools and checklists:

Please note: BPA does not provide incentives directly to homeowners. Please contact your local utility for more information.

​Partner Resources:

To learn more about weatherization, explore national best practices or find weatherization training in your area, check out these valuable online resources:

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