The home inspection is the buyer’s safety net. You pay $400 to $700, a stranger walks the house with a clipboard, and a few days later you get a PDF full of photos and code references that makes you feel like you’ve done your due diligence. Then you close, move in, and within eighteen months you’re staring at a sewer line replacement, a foundation crack, or a roof that needed work the inspector didn’t catch.
The dirty truth is that standard inspections are designed to flag visible defects, not predict the expensive failures that actually move buyer regret.
What the inspection scope leaves out
A general home inspection is explicitly visual and non-invasive. The inspector won’t open walls, drain water heaters, scope sewer lines, or pull electrical panels apart. They won’t climb a steep roof. They won’t crawl through a cramped attic if conditions are unsafe. They won’t test every outlet, run every appliance through a full cycle, or evaluate the actual remaining life of major systems.
That’s not negligence. It’s the contract. Read the standards of practice from ASHI or InterNACHI and you’ll see scope language that excludes most of what causes post-closing pain. Buyers who skim the report don’t realize the report is telling them what wasn’t checked, often in plain language, often on the first page.
The expensive failures that hide from inspectors
The list is consistent across regions. Sewer lines made of clay or Orangeburg pipe that look fine from the cleanout but are collapsing underground. Foundations with monolithic slabs that hide moisture problems until they crack drywall. HVAC equipment that’s “operational” today and dead within a year because nobody pulled the panels and looked at the heat exchanger. Roofs with multiple shingle layers that pass visual inspection but won’t survive another storm.
The fix is to commission specialty inspections during the option period. Sewer scope. Roof certification by a licensed roofer. HVAC evaluation by a service company, not just a generalist. Foundation review in problem soils. Each one runs $100 to $400, and any of them can change a deal.
Why agents don’t always push for these
Specialty inspections slow down deals and surface problems that lead to renegotiation or contract failure. Agents work on commission, and commission depends on closing. The incentive structure quietly tilts away from anything that introduces friction in the final two weeks. Most agents are honest, but the structural pressure is real.
Buyers should assume nobody else in the transaction is fully aligned with their long-term interests. The seller wants to close. The seller’s agent wants to close. The buyer’s agent usually wants to close. The inspector wants to keep agents referring them, which means not killing too many deals. The buyer is the only person with skin in the game after move-in day.
The takeaway
A general home inspection is necessary but not sufficient. Treat it as the first layer of due diligence and budget for two or three specialty inspections in any contract you’re serious about. The cost is small. The asymmetry of finding a problem before closing versus after is enormous.
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