What Weatherization Auditors Look For

Last updated: July 28, 2026

The weatherization audit decides what the program can safely do, what it must skip, and whether a repair problem must be handled first.

The U.S. Department of Energy describes the audit as a computerized assessment that reviews energy bills, air leakage, energy equipment, and all accessible areas of the home. Exact tests and approved work vary by state, home type, weather, and safety conditions.

This guide focuses on audits performed through the federal Weatherization Assistance Program, often called WAP. It also explains how that visit differs from a private home energy audit.

What the Audit Is—and Is Not

WAP treats the house as a system. Air sealing can affect combustion draft, insulation can fail when leaks remain, and a tighter home may need ventilation. The Department of Energy’s whole-house weatherization overview lists typical building-shell, mechanical, electric, and safety measures.

How to Prepare for the Appointment

Follow the instructions from your local provider first. The agency may have its own document list, consent forms, pet rules, or access requirements. These steps make most visits easier:

• Gather recent utility bills. Bring electric, gas, oil, propane, wood, or other fuel records if the agency does not already have them.
• Write down comfort problems. Note cold rooms, hot rooms, drafts, ice dams, condensation, musty smells, frequent furnace cycling, or unusually high bills.
• Clear safe access. The auditor may need to reach the furnace, boiler, water heater, electrical panel, attic hatch, crawlspace, basement, vents, and major appliances.
• Secure pets. Tell the provider about animals, locked gates, or other access concerns before the visit.
• Keep normal equipment available. Do not disconnect or hide a heater, water heater, dryer, range, or vented appliance that is normally used. The auditor needs an accurate picture of the home.
• Share important health needs. Tell the provider if someone uses oxygen, electrically powered medical equipment, has severe breathing problems, or cannot tolerate heat, cold, dust, or noise. Ask what precautions the crew can take.
• Have ownership or rental papers ready. Renters usually need landlord permission before work begins.

A local agency may ask for identification, income or benefit records, utility information, ownership papers, a lease, and household details. Use this home repair assistance document checklist to organize common records, but follow the local WAP list when it differs.

What Weatherization Auditors Check

Energy bills and how the home is used.

The auditor may compare fuel use by season, look for sudden changes, and ask which rooms are occupied. The program needs a realistic estimate of energy use and which improvements are likely to save enough energy under its approved audit method.

Explain unusual bills caused by a broken furnace, shutoff, vacancy, recent move, or medical need. A low bill may mean the household could not afford safe heating or cooling.

Air leaks and the building shell.

The auditor may inspect the exterior, walls, floors, ceilings, attic, basement, crawlspace, foundation, doors, windows, and penetrations for plumbing, wiring, chimneys, and vents. Common concerns include:

• missing, thin, wet, or damaged insulation;
• gaps around attic hatches, pipes, wires, ducts, and recessed fixtures;
• leaks where the foundation meets the floor or walls;
• drafts around doors and windows;
• roof or wall leaks that could ruin new insulation; and
• unsafe access or structural damage that prevents work.

Window replacement is not automatic. Air sealing, insulation, duct work, and equipment repairs often save more energy per program dollar. A window or door may be repaired or replaced only when the approved audit, state plan, and local scope support it.

Heating, cooling, water heating, and ducts.

The auditor may record the age, fuel, condition, size, controls, and venting of the furnace, boiler, heat pump, air conditioner, space heater, and water heater. The visit may include draft, carbon monoxide, flue, fuel-leak, and wiring checks. Ducts and heating pipes may be checked for leakage, poor insulation, disconnection, or unsafe materials.

WAP may clean, tune, repair, or replace equipment when the approved audit supports it. Emergency no-heat help may instead come from a utility, LIHEAP crisis, or local emergency program.

Ventilation, moisture, and indoor air.

Air sealing reduces uncontrolled outdoor air. It can also raise indoor pollutant levels when ventilation is poor. Auditors therefore look for bathroom and kitchen exhaust, dryer venting, condensation, plumbing or roof leaks, standing water, mold or musty odors, and combustion hazards. EPA’s weatherization and indoor-air guidance explains why air tightening, moisture control, and ventilation must be considered together.

An auditor may identify a possible hazard without diagnosing or removing it. State plans decide which limited supporting repairs are allowed and which mold, asbestos, lead, radon, pest, electrical, plumbing, or structural problems require outside help.

Lead, asbestos, radon, fire, and other hazards.

Older homes may have lead-based paint, asbestos-containing materials, vermiculite insulation, or other hazards that could be disturbed during work. Weatherization work that disturbs painted surfaces in many pre-1978 homes must follow lead-safe requirements; EPA specifically notes that many DOE weatherization activities can fall under the Renovation, Repair and Painting Rule.

The auditor may also look for alarms, fire hazards, blocked exits, unsafe wiring, fuel leaks, pest contamination, or unsafe work areas. The visit is not a substitute for a licensed electrical or structural inspection, mold assessment, asbestos survey, or radon test.

Refrigerators, freezers, lighting, and electric loads.

Some programs meter older refrigerators or freezers and may consider efficient lighting, water devices, or controls. Do not buy replacements expecting reimbursement unless the provider gives written approval.

Manufactured and multifamily homes.

Manufactured homes and multifamily buildings can qualify, but audit and owner rules differ. A manufactured-home audit may focus on the belly, roof cavity, ducts, furnace closet, skirting, and air leakage unique to that construction. See the guide to mobile and manufactured home repair programs for other repair paths.

Rental work may require owner permission, tenant protections, and enough eligible units. DOE’s current rental-unit weatherization guidance sets federal requirements, while the state or local provider explains how they apply to your property.

Tests and Tools You May See

Not every auditor performs every test. The provider follows its approved audit, home type, safety procedures, weather, and state plan.

Auditors use diagnostic tools and modeling software. The DOE Guidelines for Home Energy Professionals describe national job-task and training standards, and the Building Performance Institute Energy Auditor certification is one recognized credential. Local staffing and credential rules vary, so ask the provider who will conduct and approve your audit.

How the Audit Becomes a Scope of Work

After the visit, the auditor enters home data into the state-approved model. Measures are ranked by expected savings, cost, useful life, interaction with other work, and safety. The result is a recommended scope of work.

The list may include insulation, air sealing, duct work, heating or water-heater measures, ventilation, alarms, efficient lighting, and limited repairs needed to protect the weatherization work.

WAP is an energy-efficiency program, not a general remodeling benefit. A leaking roof, failed foundation, major plumbing problem, or electrical hazard may need repair first. Homeowners who need broader help can review home repair assistance options.

Why a Home May Be Deferred

A deferral means the program postpones work because the home or work area is not ready for safe, effective weatherization. It is not always a permanent denial. DOE explains that a leaking roof may need repair before attic insulation, and local providers sometimes combine other funds to solve the problem and return the home to the weatherization list.

Possible deferral reasons include:

• active roof, wall, foundation, plumbing, or groundwater leaks;
• major structural instability or unsafe electrical conditions;
• extensive mold, sewage, animal waste, pests, or other biological hazards;
• asbestos, vermiculite, lead, or another material that cannot be safely disturbed within the program’s scope;
• an unsafe combustion appliance, fuel leak, or venting problem beyond allowable repair;
• blocked access, severe clutter, aggressive animals, or another worker-safety problem;
• no required landlord permission or owner agreement;
• the occupant refuses a required safety measure, such as needed ventilation; or
• the repair cost is too large or the needed work is outside the state plan.

The state health-and-safety plan controls exact rules. DOE’s Weatherization Health and Safety guidance sets national minimum requirements, but local providers decide cases under their approved plans.

For a roof-related deferral, check these roof repair assistance paths. If you believe the decision is wrong or the agency did not explain it, use the steps in what to do after home repair assistance is denied.

Who May Qualify for WAP in 2026

DOE says households at or below 200% of the federal poverty guidelines, or households that receive Supplemental Security Income, are eligible under federal guidelines. A state or territory may instead use the LIHEAP limit of 60% of state median income. The local provider applies the rule selected in its approved state, territorial, or tribal plan.

The table shows 200% of the 2026 poverty guidelines for the 48 contiguous states and Washington, D.C. Alaska and Hawaii are higher. Confirm the local limit and income period using the current HHS poverty guidelines.

Income eligibility does not guarantee immediate service. Local providers may have waitlists, and priority may go to households with older adults, people with disabilities, children, high energy use, or high energy burden. Homeowners and renters may apply, but renters need owner cooperation before work.

WAP funds flow through states, territories, and tribes to local providers. DOE issued Program Year 2026 grant guidance on July 9, 2026. That does not mean every local office has an open slot today. Ask about the current waitlist and whether applications are being accepted in your county.

How to Apply for a Weatherization Audit

For a broader application checklist, see how to apply for home repair assistance. If the state page is confusing, use this guide to find local home repair programs and call the county, city housing office, community action agency, tribal housing office, or 211.

What Happens After the Audit

The provider approves a scope and should explain the work, who will perform it, access needs, and the sequence. You may need to sign work authorizations or owner and renter forms.

Program crews or approved contractors complete the authorized measures. Ask for written notice if hidden conditions cause work to be changed or postponed.

After the work, a local WAP inspector completes a final inspection. DOE says this review checks that the work is complete, meets the program’s Standard Work Specifications, and leaves equipment operating safely. Final inspection is part of the service; it is not an optional contractor warranty you buy.

Common Mistakes to Avoid

A simple action plan

If several programs may be needed, start with where to start with home repair help. Rural homeowners may also want to check rural home repair assistance for repair programs that can sometimes address conditions outside WAP.