As a Registered Home Inspector serving the beautiful town of Caledon, Ontario, I've walked through h

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Aamir Yaqoob, RHI

RHI Certified · OAHI Member · InterNACHI · E&O Insured

April 7, 2026 · 4 min read

As a Registered Home Inspector serving the beautiful town of Caledon, Ontario, I've walked through hundreds of homes over the years, from charming heritage properties in Alton to modern builds in Bolton. While each inspection tells its own story, certain issues appear time and again across our community. Today I want to share the five most common findings that surface during home inspections in Caledon, along with what they might mean for your wallet and your family's safety.

Aluminum wiring tops my list of concerns, particularly in homes built between 1965 and 1973. Many of Caledon's established neighborhoods feature these older electrical systems, and while aluminum wiring isn't inherently dangerous, it requires special attention. The metal expands and contracts more than copper, potentially causing loose connections that can lead to arcing and fires. During inspections, I often find aluminum wiring connected to standard outlets and switches not designed for this material. Homeowners typically face costs between $8,000 to $15,000 for complete rewiring, though partial updates focusing on high-risk areas might run $3,000 to $6,000.

Poly-B plumbing represents another significant finding in Caledon homes from the 1970s and 1980s. This gray plastic piping was popular during construction booms but has since proven problematic due to its tendency to become brittle and fail, especially when exposed to chlorine in municipal water. I regularly discover hairline cracks, bulging pipes, or evidence of previous leaks during my inspections. The replacement cost varies dramatically based on home size and accessibility, ranging from $8,000 for a small bungalow to $20,000 or more for larger two-story homes with multiple bathrooms.

Foundation issues present themselves differently across Caledon's diverse housing stock. Our clay-heavy soil and freeze-thaw cycles create unique challenges for foundations. Horizontal cracks often indicate structural concerns requiring immediate attention, while vertical settling cracks might be cosmetic. I pay special attention to basement walls, looking for bowing, efflorescence, or water penetration signs. Repair costs span a wide range: minor crack sealing might cost $500 to $1,500, while major foundation work can reach $15,000 to $30,000 depending on the extent of structural damage.

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Roofing wear reflects both our harsh Canadian winters and the age of many Caledon properties. Asphalt shingles typically last 20 to 25 years, but I often encounter roofs showing premature wear due to ice damming, missing granules, or inadequate ventilation. Metal roofing, popular on many rural Caledon properties, can last longer but may show rust or loose fasteners. A complete asphalt shingle replacement generally costs between $12,000 and $25,000, while metal roofing runs $15,000 to $35,000. Partial repairs might only require $2,000 to $5,000, making regular maintenance crucial for extending roof life.

HVAC system failures round out my top five findings, often involving aging furnaces or inadequate ductwork in older homes. Caledon's rural properties sometimes rely on oil or propane heating systems requiring specialized maintenance. I frequently discover blocked vents, dirty filters, or heating systems nearing the end of their operational life. A new high-efficiency gas furnace installation typically costs $4,000 to $8,000, while complete HVAC system replacement including ductwork can reach $12,000 to $20,000.

Just last month, I inspected a lovely 1970s home in Inglewood where the sellers were shocked to learn about multiple issues. The property featured aluminum wiring throughout, Poly-B plumbing in two bathrooms, and a 30-year-old roof showing significant granule loss. While initially overwhelming, we worked together to prioritize safety concerns and develop a realistic timeline for addressing each issue. The buyers ultimately proceeded with the purchase, using the inspection findings to negotiate repairs and plan their renovation budget accordingly.

These common findings shouldn't discourage potential homebuyers or cause panic among current homeowners. Knowledge empowers better decisions, whether you're purchasing, selling, or maintaining your Caledon home. Regular professional inspections can catch problems early, potentially saving thousands in emergency repairs while keeping your family safe and comfortable.

Remember, every home has a story, and my job is helping you understand that story completely. Whether you're considering a century farmhouse or a modern subdivision home, a thorough inspection provides the foundation for confident homeownership decisions in our wonderful Caledon community.

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