Home Inspection Playbook: Red Flags vs. Minor Repairs | Metro Detroit

Confused by a home inspection report? Learn the difference between major red flags and simple repairs in Metro Detroit homes so you can negotiate with confidence

The Home Inspection Playbook: Red Flags vs. Minor Repairs

Getting an offer accepted on a home is a major win. But once the initial excitement settles, the next critical step begins: the home inspection.

A few days after going under contract, a licensed home inspector will examine the property from roof to foundation. A few hours later, you will receive a digital report that can easily run 40 to 60 pages long, filled with detailed photos, colored badges, and technical jargon.

For first-time buyers, opening that document for the first time can feel overwhelming. A report listing 50 separate issues might make a home look like it is falling apart.

The secret to navigating a home inspection is learning how to separate major red flags from minor maintenance items. Every house, even a brand-new build, has a list of flaws. The goal of an inspection is not to find a perfect home, but to make sure you fully understand the property's true condition before finalizing your purchase.

What Is a Home Inspection (and What Is It Not)?

A home inspection is a visual, non-invasive examination of a home’s physical structure and mechanical systems. The inspector acts as an independent evaluator, checking everything they can safely access, including the roof, attic, basement, electrical panel, plumbing, and heating and cooling units.

Core Purpose of a Home Inspection

• Nature: Visual check, non-invasive, educational assessment.

• Primary Goal: Identify major safety risks, structural defects, and upcoming core mechanical replacements.

Important Distinctions for First-Time Buyers:

• An inspection is NOT a pass/fail exam. The inspector does not issue a grade. They simply document existing conditions.

• An inspector cannot see through walls. If an issue is hidden behind drywall, under heavy carpeting, or buried underground, a standard visual inspection may not catch it.

• An inspector is a generalist. If they spot a potential issue, such as a hairline crack in a furnace heat exchanger, they will recommend a specialized contractor (such as a licensed HVAC technician) to investigate further.

Major Red Flags: The "Big Four" System Failures

In Metro Detroit, homes range from historic bungalows built in the 1920s in inner-ring suburbs like Royal Oak, Ferndale, or Grosse Pointe, to newer subdivisions built in the 2000s in Novi, Macomb, or Canton. Regardless of the age of the home, major red flags generally fall into four primary categories: Structure, Roof, Mechanicals, and Plumbing/Electrical.

These are issues that involve significant safety hazards or require expensive repairs (often $5,000 to $15,000 or more).

Key Red Flag Categories:

• 1. Structural & Foundation: Horizontal basement cracks, bowing walls, stair-step masonry cracks.

• 2. Roofing & Attic Deficiencies: Ice dam history, structural sagging, active leaks, attic mold.

• 3. Outdated or Hazardous Electrical/Plumbing: Knob-and-tube wiring, dangerous panels, galvanized pipe, sewer root intrusion.

• 4. Failing Core Mechanicals: Heat exchanger leaks, ancient boilers, failing furnace units.

1. Structural and Foundation Deficiencies

Southeast Michigan is known for heavy clay soil, which expands when wet and contracts when dry. Combined with winter freeze-and-thaw cycles, this creates significant hydrostatic pressure against basement walls.

• Red Flags: Large horizontal cracks along basement block walls, bowing or bulging foundation walls, or severe vertical stair-step cracks in brick exteriors.

• Why it matters: Repairing or bracing foundation walls requires specialized engineering and structural reinforcement, which can easily cost thousands of dollars.

2. Roofing and Attic Moisture Problems

The roof is your home's primary shield against Michigan weather. Heavy winter snow and spring rains test roof integrity constantly.

• Red Flags: Roofs with multiple layers of shingles, sagging rooflines, or widespread moss growth indicating water retention. Inside the attic, look out for inadequate ventilation leading to moisture buildup or mold growth on the underside of the roof decking.

• Why it matters: Replacing a roof or remediating attic mold is a significant capital expense that usually cannot be postponed.

3. Outdated or Unsafe Electrical and Plumbing

Older housing stock across Metro Detroit frequently features outdated building materials that no longer meet modern safety codes.

• Red Flags (Electrical): Ungrounded knob-and-tube wiring (common in pre-1950s homes), active aluminum wiring, or hazardous, outdated breaker panels (such as Federal Pacific or Zinsco panels, which are notorious fire hazards and often make a home difficult to insure).

• Red Flags (Plumbing): Galvanized steel pipes that rust from the inside out, severely restricting water pressure. Additionally, older neighborhoods often have clay main sewer lines susceptible to tree root intrusion or collapse.

4. End-of-Life HVAC Systems & Environmental Risks

Michigan winters require a reliable heat source. A furnace that fails in January is an immediate health and safety emergency.

• Red Flags: A cracked heat exchanger in a gas furnace (which can leak deadly carbon monoxide gas into the home) or a boiler system that shows severe corrosion and active leaks.

• Radon Considerations: Elevated radon gas is also common across Southeast Michigan (particularly in parts of Oakland and Washtenaw counties). Radon is an invisible, odorless soil gas. Remediation typically involves installing a vent pipe and fan system costing between $1,000 and $1,500.

Minor Repairs: The "Weekend DIY" List

It is easy to feel overwhelmed when an inspection report lists 30 or 40 items in bullet points. However, many of these findings are routine maintenance items that simply come with owning a home.

Common Minor Items You Shouldn't Panic About:

• Uncaulked Tubs or Countertops: Re-caulking a bathtub or sink is a 30-minute DIY project that prevents minor surface leaks.

• Missing GFCI Outlets: Ground Fault Circuit Interrupter (GFCI) outlets are modern safety features required near water sources (like kitchens and bathrooms). Upgrading a standard outlet to a GFCI outlet is a quick, inexpensive job for an electrician.

• Reverse Polarity Outlets: This simply means the hot and neutral wires were flipped when installing an outlet, an easy fix for an electrician.

• Minor Exterior Grading Adjustments: If soil slants slightly toward the home, adding a few bags of topsoil or extending gutter downspouts six feet away from the foundation solves most surface water runoff issues.

• Sticky Windows or Doors: Normal house settling or seasonal humidity changes frequently cause wood doors or windows to rub against their frames.

Real-World Example: Reading the Report Objectively

Consider two buyers reviewing inspection reports for similar 1,500-square-foot homes in Metro Detroit:

• Buyer A receives a report with 42 flagged items. The report notes dirty furnace filters, missing outlet covers, a squeaky floorboard, a loose toilet, and an uncaulked shower. Buyer A panics, feeling the house is in disrepair. In reality, these are minor maintenance tasks totaling under $300 in basic hardware supplies.

• Buyer B receives a report with only six flagged items. However, one item notes a horizontal crack in the basement block wall with 1.5 inches of deflection, and another notes an active carbon monoxide leak from a 28-year-old furnace.

Although Buyer B's report looks much shorter, it contains two major red flags requiring immediate structural and mechanical intervention costing thousands of dollars. Always prioritize severity over the sheer volume of items listed.

How to Handle Findings in Michigan (Negotiations & Next Steps)

In a standard Michigan real estate purchase agreement, buyers typically negotiate an Inspection Contingency Period (usually 7 to 10 calendar days from contract acceptance). During this window, you have the right to complete all inspections and decide how to proceed.