Protect your home by sealing leaks and adding insulation—that’s what weatherization is all about. Proper insulation prevents heat loss and reduces the amount of heating and cooling you need to remain comfortable all year long.

Should You Invest in More Insulation?

Currently, all new homes are required to have R-49 insulation in the ceiling (13 inches of cellulose insulation or 20 inches of fiberglass insulation) and R-30 insulation in the floor (a 10-inch batt of insulation) over unconditioned space.

How much more insulation you need depends on the cost of the fuel you use to heat your home. From a purely financial standpoint, the less you pay for heating fuel, the less it makes sense for you to invest in more insulation. For example, homes that were built in the 1960s and 1970s had little insulation because the cost of fuel didn’t justify much of an investment in insulation. As heating costs increase, it makes more financial sense to increase insulation.

Weatherization Incentives and Loans
We offer weatherization loans (subject to credit approval) and incentives for making improvements to existing homes and manufactured homes that are electrically heated.

Double Pane Windows U-factor < or = 0.30
Triple Pane Windows U-factor < or = 0.22
Pre-condition: single—any frame; double —metal frame
Post-condition: double—vinyl frame; triple—vinyl frame
$6.00 per square foot
$8.00 per square foot
Floor Insulation
Pre-condition: existing insulation of R-11 or less for single family homes and existing insulation of R-7 or less for manufactured homes

Post-condition: insulation installed up to R-19, R-25, or R-30
$0.50 per square foot
Attic Insulation
Pre-condition: existing insulation R-19 or less
Post-condition: insulation installed up to R-38 or R-49
$0.40 per square foot
Wall Insulation
Pre-condition: not previously performed, existing insulation = R-0
Post-condition: insulation installed up to R-11
$1.20 per square foot
Duct sealing to PTCS** standards$200
Duct Insulation
Pre-Condition: Existing duct system uninsulated in unconditioned space
Post-Condition: Insulation installed to a minimum R-11
$0.60 per linear foot
Attic Air Sealing$100
Crawl Space Air Sealing$100
Whole House Air Sealing$300
Energy Star Exterior Insulated Door$40 per door

Incentives for Existing and Manufactured Homes
Our incentives program reimburses a portion of your weatherization expenses. To qualify for incentives, the weatherization work must be done by a contractor participating in our Contractor Network. If you also receive a weatherization loan from the utility, the appropriate incentive payment will be credited against your loan amount when your loan documents are signed.

NOTICE:  Clark Public Utilities will be discontinuing the residential conservation loan program, effective June 1, 2023.  All approved loans must be funded by September 30, 2023.  Please contact us with any questions, 360-992-3355

Loans for Existing and Manufactured Homes
To get started, call 360-992-3355 to speak with an energy counselor about your proposed weatherization project and loan requirements. They’ll ask for information about your home, answer any questions you may have and send you a loan application.

Loans of up to $15,000 at 4.99% interest are available for:

  • Air sealing
  • Attic insulation
  • Duct sealing
  • Floor insulation
  • Wall insulation (not applicable to manufactured homes)
  • Windows
  • Exterior insulated doors

Loan Terms

  • If the loan applicant is legally married, the spouse must also apply for the loan as a co-applicant.
  • Loans for work on manufactured homes are limited to $7,500 or less and limited to $15,000 or less for site-built homes.
  • Weatherization loans are available and are based on the contractor’s proposal.
  • Loans are repayable over five years for amounts less than $10,000 and seven years on amounts at $10,000 or more, but your monthly payment will be at least $25.
  • Processing fees: $290 for loans at $7,500 or less; $725 for loans more than $7,500. Fees can be paid upfront or added to your loan.
  • Loan payments are billed monthly, separately from your energy bill.
  • Options or extra costs not eligible for financing must be paid directly to your contractor.
  • Loans are not transferable, so if you sell your home you must pay the unpaid balance on the loan in full.
  • Financing is not available for new construction.
  • Existing loans cannot be refinanced by the Utility.
  • Loans are subject to credit and equity approval.
  • A lien is filed on the home for loans above $7,500.
  • The current interest rate for the loan program is 4.99%.

Apply for a Loan

Low-income Weatherization Program
We partner with Clark County to offer a low-income weatherization and ductless heat pump program for eligible residents. Both owner-occupied and rental homes, including manufactured homes, are eligible for the program if income guidelines are met.

Multi-family Property Weatherization Program
We offer a variety of weatherization rebates for owners of electrically heated multi-family buildings (five or more units) in Clark County. Rebates are available for windows and insulation upgrades.

Your energy savings and project costs will vary. Program requirements and rebate amounts are subject to change without notice. We do not endorse any particular contractor, manufacturer or product. We make no express or implied warranties of these products or installations. There are limits to loans, rebates and grants (when available).