Start with water issues. Always. Check the base of walls near bathrooms and kitchens. Soft drywall or swelling near the floor trim usually means moisture’s been trapped there longer than it should. A small stain on the ceiling? Could be an old problem–or one still active. I’ve tapped ceiling spots that crumbled immediately, and it wasn’t always obvious at first glance.
Wiring next. Pull the cover off the breaker panel, if possible. Look for burnt plastic smells or double-tapped breakers–two wires jammed into one terminal. That’s not to code. Older buildings might still have aluminum wiring; it can oxidize and overheat. Not every buyer asks about this, but they should. I had a friend who didn’t, and the first winter they lost partial power after a warm day because of expanding connections.
Don’t skip the mechanical room. Furnace filters caked in dust often mean more than just poor air flow–they usually reflect how the whole space has been maintained. Look for rust around the base of the water heater. Feel the floor nearby–if it’s warmer than it should be, especially without in-floor heating, something might be leaking under the slab. Happens more than you’d think.
Structural Issues That May Affect Safety or Value
Start with the foundation. Hairline cracks aren’t always a red flag, but anything wider than 1/4 inch, especially those that run diagonally or vertically from windows and doors, may point to shifting or settling. If there’s moisture pooling near the base of exterior walls, that might be a drainage problem–possibly affecting both the structure and air quality inside.
Next, pay close attention to floors that feel uneven. A slight slope across a room might go unnoticed until someone points it out, but in older properties, this can suggest underlying issues with joists or subflooring. Creaks alone aren’t concerning, but bouncing or dipping underfoot might be.
Walls and Load-Bearing Elements
Warped or bowing walls, especially in basements, suggest lateral pressure from soil or poor backfill. Drywall that looks wavy or bulging may not just be cosmetic–it might indicate hidden water damage or even compromised studs. If interior doors no longer close properly or rub at the top, something might have shifted structurally. It’s subtle, but it matters.
Roof Structure and Attic Framing
From outside, sagging ridgelines can be a warning sign. Inside the attic, cracked or split rafters, missing collar ties, or signs of water intrusion (like darkened wood or mold traces) should be flagged. Even light staining can mean the structure has been tested by snow load, ice dams, or age.
Some things are fixable without too much fuss. Others can turn into budget-swallowing projects if overlooked. If anything seems questionable–especially with wood rot, insect damage, or prior DIY reinforcements–get a second opinion before proceeding. Not all problems scream. Some just quietly wait.
Signs of Water Damage and Moisture Problems in Key Areas
Check around baseboards, under sinks, and near windows for discoloured drywall or soft, spongy sections – that usually means water’s been there for a while. Sometimes it’s just a faint stain on the ceiling, other times paint will bubble or flake off. Either way, those marks rarely lie. A musty smell in the basement? That’s often the first giveaway, long before anything becomes visible.
In bathrooms and kitchens, look closely at caulking and grout lines. Cracks or missing sections allow moisture to seep behind tiles, where it quietly builds up. I once saw a bathroom wall that looked fine – until we touched it. The entire section collapsed inwards; the studs behind were black with mould. That’s the kind of thing that silently chips away at value.
Hidden Trouble in Basements and Attics
Finished basements hide a lot. If carpeting feels damp, even slightly, or if there’s a white chalky residue on concrete walls (efflorescence), there’s likely a slow leak. Some owners run dehumidifiers constantly, which masks the symptoms. That’s not a fix. It just delays repairs. In the attic, check around vents and the chimney stack. Wet insulation or rusted nails poking through the sheathing? That usually means the roof’s letting water in.
After pest treatment, moisture can also interfere with cleaning routines. Here’s a practical read: Can I mop the floor after pest control in Calgary. Timing matters if you’re dealing with both pest residues and dampness.
Mould, Humidity, and Unexpected Clues
Not all damage looks like damage. Black spots on ceiling corners, warping on laminate flooring, or doors that swell and stick during humid periods – all are subtle signs. Mould isn’t always black, either. Sometimes it’s grey or green fuzz in hidden corners. A cheap humidity gauge can be eye-opening. Anything above 60% for extended periods usually means trouble is brewing.
For added context on local inspection-related issues or follow-up services, a-zbusinessfinder.com about The Pest Control Guy offers a bit more background. They’ve seen a lot of strange situations out there, many starting with a leaky pipe and ending in full remediation.
Assessment of Electrical, Heating, and Plumbing Systems
Start by testing every light switch and outlet. If something doesn’t respond, it’s usually either a faulty fixture or a deeper wiring issue. Older properties–especially anything built before the mid-1980s–might still have aluminum wiring, which raises red flags. You’ll want a certified electrician to review those circuits. GFCIs in bathrooms, kitchens, and outdoor outlets are a must; their absence usually means upgrades are overdue.
Furnaces should fire up quickly without rumbling or strange odours. If the flame isn’t blue (and steady), there could be combustion problems or poor ventilation. That faint burnt-dust smell when turning on the heat for the first time in months is common–but a persistent smell of fuel isn’t. Ductwork should be checked for gaps and build-up. Some inspectors use thermal cameras to detect heat loss around registers, which can signal disconnected vents in the attic or crawlspace.
Water systems often tell their story through pressure and temperature. Run all taps–watch for slow flow or inconsistent heat. Rusty or brown water, even if brief, might indicate corrosion in galvanized pipes. A small leak under a sink might look harmless, but staining in cabinetry or a soft floor near the tub tells a longer story. Water heaters should be properly strapped (especially in areas prone to seismic movement), and tanks older than 10 years may need replacing, even if they still function.
Sometimes, there’s nothing obviously wrong–no tripped breakers, no dripping pipes. But maybe the breaker panel is maxed out, or the furnace hasn’t been serviced in five years. These aren’t deal-breakers, but they do add weight to repair estimates. If you’re seeing mismatched plumbing materials–like copper spliced to PEX or cast iron–it’s worth checking whether the work was permitted. You don’t want to inherit a DIY job gone sideways.
In multi-unit dwellings or rentals, shared systems complicate things. Isolating which unit controls which shut-off can take time, especially if labels are faded or missing. But it matters, especially in emergencies.
If you’re curious how post-treatment cleaning affects these systems, this article might help: Can I mop the floor after pest control in Calgary.
Q&A:
What parts of the electrical system are usually checked during a home inspection?
The inspector will test the electrical panel for proper labeling, grounding, and amperage capacity. They’ll also look for outdated wiring types like knob-and-tube or aluminum, check for GFCI outlets in kitchens and bathrooms, and verify the condition of visible wires and junction boxes. Overloaded circuits or double-tapped breakers are flagged as safety concerns.
How do inspectors identify signs of foundation problems?
Inspectors examine the base of the home for horizontal or stair-step cracks, especially around windows, doors, and corners. Uneven floors, doors that stick or don’t close properly, and gaps between walls and ceilings may also indicate shifting or settling. They’ll often use a level to detect subtle slopes across floor surfaces.
Can hidden water damage be detected during a routine inspection?
Yes, in many cases. Inspectors look for staining, warping, or bubbling on walls, ceilings, and baseboards. Moisture meters may be used to measure water content in suspect areas. In bathrooms, kitchens, and basements, they’ll check for mold odors, poor ventilation, and signs of plumbing leaks behind or beneath fixtures.
Do inspectors check the HVAC system in detail?
They assess the age, general condition, and operation of the system but do not perform in-depth diagnostics. This means the inspector will verify that heating and cooling units turn on, produce hot/cold air, and aren’t visibly damaged or leaking. However, a licensed HVAC technician is needed for full performance testing or refrigerant checks.
What plumbing issues typically raise red flags during a home check?
Inspectors focus on pipe material (e.g., galvanized steel, which corrodes over time), visible leaks, water pressure, and proper drainage. Old or corroded supply lines, slow-draining sinks, and evidence of past flooding in crawlspaces or basements may signal expensive repairs. Water heater condition and installation quality are also reviewed.
What specific issues do home inspectors focus on regarding the roof during an inspection?
During a home inspection, the roof is carefully examined for signs of damage such as missing, cracked, or curling shingles, which can lead to leaks. Inspectors also check the condition of flashing around chimneys and vents to ensure proper sealing. The presence of sagging areas or uneven surfaces may indicate structural problems. Additionally, gutters and downspouts are assessed to confirm they are securely attached and clear of debris, preventing water damage. These details help determine the roof’s current state and potential future repairs.