What are the most common issues found in Calgary home inspections?

Roof and hail wear, attic ventilation issues, grading and drainage, basement moisture, older electrical, Poly-B plumbing, end-of-life mechanicals, and renovation/permit gaps top the list.

What inspection issues are expensive?

Roof replacement, foundation movement requiring engineering, full electrical or plumbing rewires/repipes, and HVAC replacement. Most other findings are in the hundreds to low-thousands range.

Are roof issues common in Calgary?

Yes. Hail history and freeze-thaw mean roof wear shows up on most inspections. Partial replacements after insurance claims are particularly common.

Are attic frost issues common in Calgary?

Very common — winter inspections almost always find some attic moisture pattern, usually from bath-fan venting, insulation gaps, or ventilation imbalance.

What should sellers fix before listing?

Inexpensive high-friction items: smoke/CO alarms, GFCI receptacles, downspout extensions, bath-fan terminations, visible leaks, and any safety items flagged in a pre-listing inspection.

Should buyers walk away after a bad inspection?

Sometimes — but most reports describe manageable issues. Use the four-step framework: read, classify, investigate, decide.

What issues need specialist follow-up?

Anything flagged for further evaluation — structural movement, HVAC abnormalities, plumbing concerns, or environmental items.

Are older Calgary homes riskier to inspect?

Older homes carry more findings per inspection, but they are not riskier — they are more informative. The buyer who reads the report carefully is well-positioned.

The 25 Most Common Calgary Home Inspection Issues Buyers and Sellers See

Name: The Calgary Home Inspector Corp.
Address: Calgary, AB, CA
Telephone: 825-863-2372

After enough Calgary inspections, the same defect categories show up on report after report. This guide groups them by system, explains why each is common in our climate and housing stock, and tells buyers which to act on now and which to file as future maintenance.

Direct answer: the most common issue categories

Roof and hail wear — partial replacements, soft-metal damage, shingle granule loss.
Attic frost and bath-fan venting into the attic.
Negative grading and downspouts discharging at the foundation.
Basement moisture clues — efflorescence, staining, sump pump issues.
Foundation cracks — hairline vs structural movement.
Older electrical — aluminum branch wiring, knob-and-tube remnants, double-tapped breakers.
Poly-B plumbing on 1985–1997 homes.
End-of-life furnaces and water heaters.
Deck, balcony and railing safety on older builds.
Renovations without visible permits or with amateur workmanship.

Roof, hail and exterior wear

Calgary's hail seasons — particularly the major 2020 and 2024 storms — left an industry-wide pattern of partial roof replacements, mismatched shingle batches, and soft-metal damage on flashings, vents, and eavestroughs that didn't get replaced. Inspectors routinely find a north-slope roof in good shape and a south or west slope showing hail bruising, exposed mat, or accelerated granule loss. A roof is the most expensive single envelope replacement in a Calgary home, so it earns careful attention.

Attic, insulation and ventilation issues

Attic findings dominate winter Calgary inspections. The pattern is consistent: bath fans dumping into the attic instead of through the roof, insulation gaps at perimeter walls and around can lights, blocked soffit baffles, and frost or staining on the underside of the roof sheathing. Most are repairable for a few hundred to a few thousand dollars and addressed by a qualified insulation or roofing contractor.

Grading, drainage and basement moisture

Negative grading and short downspouts cause more 'mystery' basement moisture than every plumbing leak combined. Calgary's clay-rich soils swell and shrink with moisture cycles, which transmits movement to foundations. Window wells without drainage and stairwell wells without covers add water entry points. The fix is usually outside the house: extend downspouts, regrade the perimeter, and add window-well covers and drainage.

Electrical, plumbing and mechanical systems

Aluminum branch wiring on homes from the late 1960s through 1970s.
Poly-B plumbing — grey plastic supply pipe — on 1985–1997 homes.
Federal Pioneer Stab-lok panels still in service.
Water heaters at or beyond 12-year typical life.
Furnaces approaching the 20-year mark with no recent service.
Improper panel modifications and double-tapped breakers.

Renovation and flipped-home red flags

A fresh kitchen, paint, and flooring make a home photograph well — and can hide system-level corner-cutting. Inspectors look for new finishes over older systems, drain re-routing without proper venting, electrical work without permits, basement developments missing egress or smoke alarms, and HVAC modifications that don't match the rest of the system. A flipped home isn't automatically a bad buy, but it deserves more time in the report and more questions to the seller.

What buyers should not panic about

Hairline shrinkage cracks on a foundation wall — common, monitor.
Single missing shingle on an otherwise sound roof.
A loose receptacle or two — minor electrical fix.
Cosmetic drywall and paint touch-up after settlement.
Expected end-of-life replacements you can budget for.

What sellers should fix before listing

Smoke and CO alarms at every required location.
GFCI receptacles in kitchens, bathrooms, garages and exterior.
Downspout extensions discharging away from the foundation.
Bath fan venting confirmed terminating outside.
Furnace and water heater service stickers up to date.
Visible plumbing leaks under sinks repaired.

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Frequently Asked Questions

What are the most common issues found in Calgary home inspections?: Roof and hail wear, attic ventilation issues, grading and drainage, basement moisture, older electrical, Poly-B plumbing, end-of-life mechanicals, and renovation/permit gaps top the list.
What inspection issues are expensive?: Roof replacement, foundation movement requiring engineering, full electrical or plumbing rewires/repipes, and HVAC replacement. Most other findings are in the hundreds to low-thousands range.
Are roof issues common in Calgary?: Yes. Hail history and freeze-thaw mean roof wear shows up on most inspections. Partial replacements after insurance claims are particularly common.
Are attic frost issues common in Calgary?: Very common — winter inspections almost always find some attic moisture pattern, usually from bath-fan venting, insulation gaps, or ventilation imbalance.
What should sellers fix before listing?: Inexpensive high-friction items: smoke/CO alarms, GFCI receptacles, downspout extensions, bath-fan terminations, visible leaks, and any safety items flagged in a pre-listing inspection.
Should buyers walk away after a bad inspection?: Sometimes — but most reports describe manageable issues. Use the four-step framework: read, classify, investigate, decide.
What issues need specialist follow-up?: Anything flagged for further evaluation — structural movement, HVAC abnormalities, plumbing concerns, or environmental items.
Are older Calgary homes riskier to inspect?: Older homes carry more findings per inspection, but they are not riskier — they are more informative. The buyer who reads the report carefully is well-positioned.

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