Buying or selling a home is one of the biggest financial decisions most people make. A professional home inspection is a crucial step in the process, helping to uncover hidden issues that could cost thousands down the road. Knowing the most common home inspection red flags can help buyers negotiate better deals and sellers make necessary repairs before listing. Here’s what you need to look out for—and how to fix them.
1. Foundation Cracks and Structural Issues
Why It’s a Red Flag
The foundation is the backbone of a home. Significant cracks, sloping floors, or doors that won’t close properly may indicate foundation movement, which can be a costly repair.
How to Fix It
Small cracks can be sealed with epoxy injections.
Large cracks or foundation movement may require a structural engineer’s evaluation and reinforcement.
Proper drainage and gutter systems can help prevent future foundation issues.
2. Roof Problems
Why It’s a Red Flag
A damaged roof can lead to leaks, mold, and structural damage. Missing shingles, sagging areas, or water stains inside the home are common indicators of roof issues.
How to Fix It
Replace missing or damaged shingles promptly.
Have a professional roofer inspect for underlying damage.
Ensure proper attic ventilation to prevent moisture buildup.
3. Electrical System Deficiencies
Why It’s a Red Flag
Outdated or faulty electrical wiring is a fire hazard. Common issues include aluminum wiring, double-tapped breakers, and insufficient amperage for modern appliances.
How to Fix It
Upgrade outdated panels and wiring with the help of a licensed electrician.
Replace old two-prong outlets with grounded three-prong outlets.
Address overloading by installing additional circuits as needed.
4. Plumbing Problems
Why It’s a Red Flag
Leaky pipes, low water pressure, or signs of water damage can signal costly plumbing repairs. Older homes may have galvanized pipes that corrode over time.
How to Fix It
Fix leaks immediately to prevent mold growth.
Replace old pipes with modern materials like PEX or copper.
Install a pressure regulator if water pressure is too high.
5. HVAC System Issues
Why It’s a Red Flag
Heating, ventilation, and air conditioning (HVAC) systems are expensive to replace. An outdated or malfunctioning unit can lead to high energy bills and poor indoor air quality.
How to Fix It
Have the system serviced annually to extend its lifespan.
Replace dirty filters regularly to maintain efficiency.
If the unit is 15+ years old, consider upgrading to a more energy-efficient system.
6. Mold and Moisture Problems
Why It’s a Red Flag
Mold growth can indicate water intrusion, poor ventilation, or high humidity. It can also pose health risks to occupants.
How to Fix It
Identify and fix the source of moisture.
Use dehumidifiers in humid areas.
Clean minor mold growth with a water-and-vinegar solution; call professionals for extensive mold remediation.
7. Pest Infestations
Why It’s a Red Flag
Termites, rodents, and other pests can cause significant damage to a home’s structure and insulation.
How to Fix It
Seal entry points such as gaps in walls or around pipes.
Schedule regular pest control inspections.
Remove sources of food and water that attract pests.
8. Poor Drainage and Grading
Why It’s a Red Flag
Improper grading can cause water to pool around the foundation, leading to leaks, mold, and even structural issues.
How to Fix It
Ensure the ground slopes away from the foundation.
Clean and extend downspouts to direct water away from the home.
Consider installing a French drain system if necessary.
9. Asbestos or Lead-Based Paint
Why It’s a Red Flag
Older homes may contain hazardous materials like asbestos (in insulation and flooring) or lead-based paint, which pose serious health risks. Not all home inspectors are licensed to inspect ASBESTOS or lead paint, so make sure you ask!
How to Fix It
Do not disturb materials suspected to contain asbestos—consult a specialist.
Have lead-based paint tested and removed by a certified professional if necessary.
Follow proper safety guidelines when renovating older homes.
Home Inspection Red Flags: Final Thoughts
A home inspection is a critical step in the buying or selling process. While some issues are deal-breakers, others can be resolved with the right approach. Being informed about common home inspection red flags empowers you to make smarter real estate decisions.
Need a reliable home inspection in San Bernardino, Los Angeles, or Orange County? Strong Tower Home Inspections  is here to help! Contact us today to schedule your professional inspection and gain peace of mind. 909-784-5033