Is aluminum wiring dangerous in Mercier homes?

Aluminum wiring, common in bungalows built between 1965 and 1975 in east Mercier, presents an increased fire risk at connection points. Aluminum expands and contracts differently than copper, creating loose connections that can overheat. We identify its presence, check the condition of connections and recommend appropriate corrective measures.

Does the clay soil in Hochelaga cause foundation problems?

Yes. Hochelaga-Maisonneuve sits on clay soil with a high water table due to the proximity of the St. Lawrence River. This soil causes differential foundation settlement, visible through sloping floors, stair-step cracks in masonry and doors that no longer close properly. Shoebox houses are particularly vulnerable.

Building Inspection

Building Inspector in
Mercier-Hochelaga-Maisonneuve

A historically working-class neighborhood in east Montreal, Mercier-Hochelaga-Maisonneuve offers a mix of century-old shoebox houses in Hochelaga and post-war bungalows in Mercier-Est. Clay soil near the river and an aging housing stock demand a rigorous inspection.

Housing Profile

MHM: two eras
of construction.

Mercier-Hochelaga-Maisonneuve is a borough with two faces. Hochelaga-Maisonneuve retains early 20th-century working-class heritage — shoebox houses, multiplexes and row houses — while Mercier-Est offers a landscape of 1960s-1970s bungalows and split-levels. This duality creates very different inspection challenges depending on the area.

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Shoebox Houses & Multiplexes (1900-1940)

Hochelaga-Maisonneuve is filled with small brick worker houses, with stone or old concrete foundations, wood floors and period plumbing. Their compact and economical construction often hides structural and moisture problems.

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Post-War Bungalows (1960-1975)

Mercier-Est was developed in the 1960s-1970s with bungalows, split-levels and cottages. These homes often feature aluminum wiring, vermiculite insulation and concrete block foundations that present specific challenges.

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Evolving Housing Stock

Hochelaga is undergoing progressive gentrification with renovations of variable quality. Some buildings are fully restored, others feature cosmetic renovations that mask underlying problems. An inspection helps distinguish between the two.

Soil & Foundations

Clay and river:
the subsoil of MHM.

Mercier-Hochelaga-Maisonneuve is located in the eastern part of the island of Montreal, near the St. Lawrence River. The soil is dominated by Champlain Sea marine clay, with a high water table in areas closest to the waterway. These geological conditions create a particularly demanding environment for foundations.

✓ Clay soil with high water table — The proximity of the river keeps the water table high, especially in the south of the borough. Shoebox house basements are chronically damp during heavy rains and spring snowmelt.

✓ Old foundation settlement — Stone or unreinforced concrete foundations of century-old Hochelaga buildings undergo differential settlement from expansive clay soil, causing cracks and misalignment.

✓ Concrete block foundations (Mercier-Est) — 1960s-1970s bungalows often rest on concrete block foundations, more vulnerable to infiltration than poured concrete. Joints between blocks are entry points for water.

✓ Missing French drain — Many Hochelaga worker houses never had a French drain, or their original clay-tile drain is completely obstructed. Without perimeter drainage, infiltration is nearly inevitable.

Common Findings

What we find
in MHM.

Inspections in this borough reveal varied issues depending on whether you are in the historic Hochelaga area or in the post-war suburbs of Mercier-Est.

✓ Aluminum wiring (Mercier-Est) — Bungalows built between 1965 and 1975 often use aluminum wiring, known for increased fire risk at connections. Anti-oxidant connectors (AlumiConn or similar) are rarely installed.

✓ Cracked and settled foundations — Hochelaga shoebox houses frequently show settlement signs: sloping floors, stair-step cracks in exterior masonry and doors that no longer close properly.

✓ Aging mixed plumbing — A mix of cast iron, galvanized steel and lead plumbing is found in Hochelaga, while Mercier-Est often has copper plumbing with lead-soldered joints. Both require evaluation.

✓ Cosmetic renovations hiding defects — With Hochelaga's gentrification, some properties have received aesthetic renovations (paint, floors) that mask unresolved structural, moisture or plumbing problems.

✓ Insufficient insulation — Both shoebox houses and period bungalows have insulation far below current standards, resulting in high energy costs and condensation problems.

✓ Roofs needing replacement — Mercier-Est bungalows are approaching or past the age of their second or third roof covering. End-of-life asphalt shingles and inadequate attic ventilation are recurring findings.

Neighborhoods Served

MHM,
in detail.

We inspect buildings throughout the entire borough, including:

Hochelaga-Maisonneuve

Historic working-class neighborhood, shoebox houses, brick multiplexes, ongoing gentrification

Mercier-Est

1960s-1970s bungalows and split-levels, quiet residential streets

Mercier-Ouest

Mixed area, duplexes and triplexes, near Maisonneuve Park

Longue-Pointe

Former industrial village, varied buildings, near the Port of Montreal

Our Services

Inspections available in
MHM.

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Pre-Purchase Inspection

Multi-Unit Inspection

Custom quote

FAQ

Questions about
MHM.

Is aluminum wiring dangerous?+

Aluminum wiring, common in Mercier-Est bungalows built between 1965 and 1975, presents an increased fire risk at connection points. Aluminum expands differently than copper, creating loose connections that overheat. We identify its presence, check connections and recommend appropriate corrective measures.

Does clay soil cause foundation problems in Hochelaga?+

Yes. The clay soil with a high water table causes differential settlement, visible through sloping floors, stair-step cracks and doors that no longer close. Shoebox houses, with their stone or unreinforced concrete foundations, are particularly vulnerable to this phenomenon.

What is the difference between Hochelaga and Mercier-Est buildings?+

Hochelaga-Maisonneuve has shoebox houses and multiplexes from the 1900s-1940s with challenges similar to the Plateau. Mercier-Est offers bungalows and split-levels from the 1960s-1970s with different issues: aluminum wiring, insufficient insulation and roofs needing replacement.

Neighboring Boroughs