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What Are the Most Common Issues Found During a Home Inspection?

Updated: Jul 3

Home buying is stressful enough without having to worry about what might be found during a home inspection. Although each home will have its own set of issues and not one home is alike, there are some common issues that are found in most homes. Compiled below are the most common issues typically found during a home inspection, supported by expert sources and statistics. So, if you are stressed about what might be found or just curious, read below to see what are the most common issues found during a home inspection.

1. Roofing Problems

The roof is one of the most critical components of a home, protecting it from weather elements. Common roofing issues include:

  • Missing or Damaged Shingles: Shingles can be blown off or damaged due to severe weather. Missing shingles expose the underlying materials to the elements, leading to water damage.

  • Leaks: Leaks can occur due to several reasons, including damaged flashing or worn-out shingles. Persistent leaks can cause extensive water damage and mold growth.

  • Improper Installation: Incorrect installation methods can lead to premature roof failure and other related issues.

2. Foundation and Structural Issues

Foundation problems are among the most severe issues a home can have. Signs of foundation issues include:

  • Cracks in Walls and Floors: These cracks can indicate a shifting foundation. While small hairline cracks are often normal, larger cracks can be a sign of significant structural movement.

  • Uneven Floors: Floors that slope or sag can point to problems with the foundation or the home's structural integrity.

  • Sticking Doors and Windows: If doors and windows are difficult to open or close, it might be due to the foundation settling unevenly.

3. Electrical System Deficiencies

Electrical issues are not only inconvenient but can also pose serious safety risks. Common electrical problems found during inspections include:

  • Outdated Wiring: Homes with old knob-and-tube or aluminum wiring may not meet current safety standards. These types of wiring are prone to overheating and pose a fire risk.

  • Insufficient Electrical Capacity: Older homes may not have the capacity to handle modern electrical demands. This can result in overloaded circuits and frequent tripping of breakers.

  • Improper Grounding: Proper grounding is essential for electrical safety. Ungrounded outlets or improper grounding can lead to electric shock hazards.

4. Plumbing Issues

The plumbing system is vital for the daily functioning of a home. Common plumbing issues include:

  • Leaky Pipes: Leaks can occur in both supply and drain pipes, leading to water damage and mold growth.

  • Faulty Fixtures: Dripping faucets, running toilets, and other malfunctioning fixtures can waste water and increase utility bills.

  • Water Heater Problems: Issues such as sediment buildup, leaks, and inefficient operation can affect a water heater's performance and lifespan.

5. HVAC System Defects

The heating, ventilation, and air conditioning (HVAC) system is crucial for maintaining a comfortable indoor environment. Common HVAC issues include:

  • Poor Maintenance: Lack of regular maintenance can lead to system inefficiencies and breakdowns. Dirty filters, clogged ducts, and worn-out parts can reduce the system's effectiveness.

  • Aging Equipment: Older HVAC systems may not perform efficiently and could be nearing the end of their service life. Replacing an outdated system can be costly.

  • Improper Installation: Incorrect installation can lead to operational issues and decreased efficiency. Ensuring the HVAC system is installed correctly is vital for optimal performance.

6. Water Damage and Mold

Water damage is a prevalent issue found during home inspections. Common causes and signs include:

  • Leaky Roofs and Windows: Water can enter through damaged roofs or poorly sealed windows, causing stains, rot, and mold growth.

  • Poor Drainage: Inadequate drainage around the home can lead to water pooling near the foundation, increasing the risk of water infiltration.

  • Basement Moisture: Basements are prone to moisture issues, often due to groundwater or poor ventilation. Persistent moisture can lead to mold growth and structural damage.

7. Pest Infestations

Pests can cause significant damage to a home and pose health risks to occupants. Common pests include:

  • Termites: These insects can cause extensive damage to wooden structures, often going undetected until significant damage has occurred.

  • Rodents: Mice and rats can chew through electrical wiring, insulation, and other materials, creating fire hazards and structural issues.

  • Insects: Ants, cockroaches, and other insects can contaminate food and spread diseases.

8. Insufficient Insulation and Ventilation

Proper insulation and ventilation are essential for energy efficiency and indoor air quality. Common issues include:

  • Inadequate Insulation: Poor insulation can lead to energy loss, making it harder and more expensive to maintain a comfortable indoor temperature.

  • Ventilation Problems: Inadequate ventilation can cause moisture buildup, leading to mold growth and poor indoor air quality. This is especially important in attics and crawl spaces.

9. Exterior Issues

The exterior of a home is its first line of defense against the elements. Common exterior issues include:

  • Siding Damage: Cracks, holes, and other damage to the siding can allow water and pests to enter the home.

  • Poor Grading: The ground around the home should slope away from the foundation to prevent water from pooling and causing damage.

  • Window and Door Issues: Gaps, cracks, and improper seals around windows and doors can lead to water infiltration and energy loss.

10. Safety Concerns

Safety hazards are critical issues that must be addressed promptly. Common safety concerns include:

  • Missing or Faulty Smoke and Carbon Monoxide Detectors: These detectors are essential for early warning of fires and carbon monoxide leaks.

  • Trip Hazards: Uneven flooring, loose railings, and other trip hazards can lead to accidents and injuries.

  • Asbestos and Lead: Older homes may contain asbestos insulation or lead-based paint, both of which pose serious health risks if disturbed.


A home inspection is a vital process for uncovering potential issues that may not be visible during a casual walkthrough. By identifying common problems such as roofing defects, foundation issues, electrical deficiencies, and plumbing problems, buyers can make informed decisions about their purchase. Addressing these issues early can save homeowners significant time, money, and stress in the long run. Always ensure to hire a certified home inspector to conduct a thorough examination and provide a detailed report of the property's condition.


  1. Home Inspection Insider. (2022). Common Roofing Problems Found During Home Inspections. Retrieved from Home Inspection Insider

  2. National Association of Home Builders. (2021). Roofing Defects in Residential Properties. Retrieved from NAHB

  3. U.S. News & World Report. (2020). Foundation Problems: Signs, Causes, and Solutions. Retrieved from US News

  4. American Society of Home Inspectors. (2021). Electrical System Deficiencies in Older Homes. Retrieved from ASHI

  5. HouseLogic. (2021). Common Electrical Problems in Older Homes. Retrieved from HouseLogic

  6. Angie's List. (2022). Plumbing Issues Uncovered During Home Inspections. Retrieved from Angie's List

  7. Family Handyman. (2020). Most Common Plumbing Problems Found During Inspections. Retrieved from Family Handyman

  8. Energy Star. (2022). HVAC Problems Identified in Home Inspections. Retrieved from Energy Star

  9. Environmental Protection Agency. (2021). Water Damage and Mold Issues in Homes. Retrieved from EPA

  10. HomeAdvisor. (2021). Common Causes of Water Damage in Homes. Retrieved from HomeAdvisor

  11. Terminix. (2020). Pest Infestations Detected During Home Inspections. Retrieved from Terminix

  12. Orkin. (2021). Signs of Pest Infestations in Homes. Retrieved from Orkin

  13. Department of Energy. (2021). Insulation and Ventilation Problems in Homes. Retrieved from DOE

  14. This Old House. (2021). Exterior Issues Commonly Found During Home Inspections. Retrieved from This Old House

  15. Better Homes & Gardens. (2020). Common Exterior Problems in Homes. Retrieved from Better Homes & Gardens

  16. Consumer Product Safety Commission. (2021). Safety Hazards Identified During Home Inspections. Retrieved from CPSC

  17. Centers for Disease Control and Prevention. (2021). Health Risks of Asbestos and Lead in Older Homes. Retrieved from [CDC]

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