Blog · 3 min read
Buying in Mauricie: The Inspection Guide (and Pyrrhotite)
In Mauricie, one question comes before all others for a recent house: pyrrhotite. But the region also has century-old workers' houses, plexes and a vast territory of cottages. Here's how to approach each case.
Pyrrhotite: the first question to ask
According to the victims' coalition, thousands of homes built from 1996 to 2008 were affected by pyrrhotite in Mauricie and part of Centre-du-Québec, about 70% of them in Trois-Rivières. Shawinigan and some municipalities in the Maskinongé and Des Chenaux RCMs are also among the affected areas.
Pyrrhotite is an iron sulphide found in some concrete aggregates. As it oxidizes, it makes walls, footings and slabs swell and crack. Damage can take years to appear, and a finished basement can hide it completely.
For a home from that period in these areas, a lab-analyzed concrete core is the only reliable check. Ask the seller whether a complete test was already done and insist on the lab report.
Pay attention to the exact year the foundation was poured, which isn't always the year shown on the listing. A house finished in early 1996 may have had its foundation poured in 1995, and a renovation or extension from the period may have its own foundation. Ask for permits or construction documents to pin down the dates.
The signs, and what they don't tell you
Typical signs are a spider-web network of cracks on foundation walls, often with rust stains, followed by crumbling concrete. The inspector looks for them wherever the foundation is visible, including the mechanical room and behind removable panels.
But the absence of cracks doesn't allow any conclusion. People involved in the issue repeat it: a contractor's opinion or the absence of cracks aren't valid references for a buyer or a mortgage lender. Only the lab analysis settles it.
If work has already been done, like a foundation replacement, ask for expert reports, plans, invoices and warranties. A repaired, documented house can be an excellent buy.
Workers' houses and plexes
Trois-Rivières, Shawinigan and Grand-Mère grew around paper mills and hydroelectricity. Their old neighbourhoods have workers' houses and plexes whose foundations are sometimes stone or lean concrete, with wiring and plumbing redone in stages.
Frequent findings are basement leaks, clogged original drains, old electrical panels, cast iron or galvanized plumbing, and additions whose junctions let water in. For a plex, every unit must be visited.
These houses aren't affected by the 1996–2008 pyrrhotite issue, but they have their own age-related concerns.
Upper Mauricie and cottages
To the north, La Tuque and Upper Mauricie form a vast forest territory where town homes sit alongside remote cottages and camps. Wood heating is very common there, and winters are long.
For these properties, the inspection focuses on the chimney and stove installation, insulation and freeze protection, as well as the well and septic system. Winter access and distance from services are also worth considering.
Many cottages were enlarged or converted into year-round homes. The inspection must assess them for the use you plan, not just for a few summer weekends.
Questions to ask the seller in Mauricie
For a recent house, the key question is simple: was a complete pyrrhotite test done on the walls, slabs and footings, and can I see the lab report? Also ask for the exact year the foundation was poured, which may differ from the year construction ended, as well as plans and building permits.
For an older house, ask for the leak history, the age of the drain and roof and the electrical work done over time. For a cottage, ask for the septic permit, pump-out records, water test results and heating type. Each written answer guides the inspection and protects your file.
Planning your inspection in Mauricie
For a 1996–2008 home in an affected area, build enough time into your offer for coring and lab analysis, which take longer than a visual inspection. It's the most important decision in your transaction.
For an older house, a drain camera and winter thermography usefully complete the inspection. For a cottage, combine the inspection, water test and septic assessment in one visit.
Finally, if you're counting on financial assistance for pyrrhotite, check the program's current status with the Société d'habitation du Québec and your municipality: it has changed over time.
- 1996–2008 home: pyrrhotite test
- Spider-web cracks and rust
- Older homes: drain, wiring, plumbing
- Cottages: chimney, freezing, well, septic
- Assistance program: check its status
