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A Home Inspector’s Guide to Spotting Red Flags During Home Tours



Buying a home is a big investment, and while it can be exciting, it’s crucial to approach it with a critical eye. While a professional home inspection is essential before finalizing any purchase, knowing how to spot potential issues during your initial tour can save you time and prevent costly surprises later on. In this guide, we’ll help you identify some common “red flags” that could indicate serious problems in a property.


1. Foundation and Structural Issues

Key red flag: Cracks in walls, ceilings, or foundations. When touring a home, look for large cracks along the walls, ceilings, or in the foundation. While hairline cracks can be normal due to settling, larger cracks might indicate structural issues. If doors and windows don’t close properly, it could also signal foundation movement.

Tip: Be particularly cautious of horizontal cracks in the foundation, as they often suggest pressure from soil and could lead to significant damage.

2. Water Damage and Mold

Key red flag: Stains, musty odors, and visible mold. Water damage is often a precursor to mold, and both can cause long-term damage to the home as well as health problems. Check basements, ceilings, and under sinks for signs of water stains or dampness. A musty smell can also indicate the presence of mold, even if it’s not visible.

Tip: Don’t forget to look in less obvious areas like behind appliances or in the attic for signs of moisture.

3. Roofing Concerns

Key red flag: Missing shingles or sagging rooflines. The roof is a crucial component of any home, and repairing or replacing it can be expensive. Look for missing or damaged shingles, sagging sections, or areas that seem to have been patched. If you’re able to access the attic, check for daylight coming through the roof and signs of water leaks.

Tip: Ask about the age of the roof and whether any recent repairs or replacements have been made.

4. Plumbing Problems

Key red flag: Low water pressure and visible pipe corrosion. During a home tour, turn on faucets and showers to check the water pressure. Low pressure could indicate pipe blockages or leaks. Also, inspect exposed pipes for signs of corrosion, especially if the home is older, as it could mean the plumbing system is nearing the end of its life.

Tip: Look for signs of recent plumbing repairs, as it could be an indicator of ongoing issues.

5. Electrical System Red Flags

Key red flag: Flickering lights, outdated wiring, or overloaded panels. Older homes may still have knob-and-tube wiring or fuse boxes, which can be fire hazards. Look out for flickering lights, warm outlets, or overloaded electrical panels. If the home has an old electrical system, upgrading it can be costly, so make sure to get an estimate from an inspector.

Tip: Ask when the electrical system was last updated, and if GFCI outlets are present in key areas like kitchens and bathrooms.

6. HVAC System Health

Key red flag: Old or malfunctioning HVAC equipment. The heating, ventilation, and air conditioning (HVAC) system is vital for home comfort and energy efficiency. Listen for strange noises coming from the furnace or AC unit, and check the age of the equipment. HVAC systems usually last 15–20 years, so if the system is nearing this range, replacement may be necessary soon.

Tip: Check the air filters to see if they are clean, as this can indicate whether the HVAC system has been well-maintained.

7. Pest Infestation Indicators

Key red flag: Droppings, chewed wood, or insect wings. Pests like termites, rodents, and ants can cause serious damage to a home. Look for signs of pest infestation, such as droppings, chewed wood, or small holes in walls. Termites often leave behind discarded wings near windows and doors.

Tip: Pay special attention to the basement, attic, and around the home’s foundation, as these areas are common entry points for pests.

Conclusion: Trust Your Instincts and Call a Pro

Even if everything looks good during your tour, remember that only a licensed home inspector can give you a complete picture of the home’s condition. But by keeping an eye out for these red flags, you can avoid potential money pits and feel more confident moving forward in the buying process.

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