GC4I team, structural engineering firm in Montreal
The balcony is the most exposed element of a Montreal building: rain, freeze-thaw cycles and de-icing salts attack it all year long. When it deteriorates, the risk affects the occupants, and also the people passing below.
Concrete, steel or wood, balconies age differently. But the warning signs are similar, and an inspection at the right time usually makes it possible to repair rather than replace.
The signs that should worry you
- Have it assessed quicklySloping balconyA slope that increases toward the outside can signal a support or anchor that is giving way.
- Have it assessed quicklyLoose guardrailA guardrail should stay firm when you lean on it; play at the fasteners is a sign not to ignore.
- Have it inspectedFlaking concreteConcrete spalls, rust stains, exposed reinforcing steel: corroded steel expands and breaks the concrete apart.
- Have it inspectedCracks at the anchorsCracks in the brick or concrete around the anchors, open mortar joints near the supports.
- Have it inspectedDeteriorated woodSoft, split or blackened wood at the supports, the stair stringers and the connections.
- Keep an eye onCorroded steelFlaking rust, loss of thickness at the welds and at the base of the columns.
If you have serious doubts
If the balcony is sloping or the guardrail gives way under your hand, restrict access to the balcony and the area below, and have the situation assessed without delay.
What the rules say
For buildings with a facade of 5 storeys or more above ground, the Building chapter of the Safety Code treats balconies as part of the facade. An inspection report signed by an engineer or an architect is required every 5 years, and any unsafe condition must be reported without delay to the Régie du bâtiment du Québec.
For other buildings, including most plexes, this regulation sets no frequency. Maintenance nevertheless remains the responsibility of the owner or the condominium syndicate, and a condominium’s maintenance log must provide for the inspection of these elements.
- 600 mmdrop beyond which a guardrail is required (Construction Code)
- 1,070 mmgeneral minimum height of a balcony guardrail; 900 mm in certain cases provided for dwellings
- 5 yearsinterval between inspection reports for facades of 5 storeys or more
The applicable requirements depend on the year of construction and the work carried out; a guardrail replacement must meet the requirements in force at the time of the work.
How the inspection works
The steps of a balcony inspection
- Visual examination of each balcony, its supports, its anchors and its guardrail, ideally from the balcony and from the ground.
- Sounding the concrete with a hammer to find delaminated areas, and checking the wood at the connections.
- Measurements of slope, deflection and guardrail height.
- Ranking the findings by urgency, balcony by balcony.
- Recommendations: repair, reinforcement or replacement, with plans and specifications if structural work is required.
Repair or replace?
A concrete slab with localized corrosion can often be repaired: the deteriorated concrete is removed, the reinforcing steel is treated or replaced, and the surface is rebuilt. When corrosion is widespread or the anchors are affected, replacement becomes safer and often more durable.
For a condominium, the inspection report also helps plan expenses: it feeds into the contingency fund study and the maintenance log.
FAQ
How often should balconies be inspected?
For facades of 5 storeys or more, the inspection report is required every 5 years. For other buildings, a yearly visual check by the owner and an inspection by a professional as soon as warning signs appear are good practice.
Who pays to repair a balcony in a condominium?
It depends on the declaration of co-ownership: balconies are often common portions for restricted use. The syndicate and the co-owners should refer to it; the engineer documents the condition and the work required.
Can you just replace the guardrail?
Only if the balcony and the anchors that hold it are in good condition. A new guardrail fastened into deteriorated concrete won’t hold any better than the old one.
Can balconies be inspected in winter?
An examination is possible, but snow and ice hide some of the findings. For a complete inspection, the warmer months are better; if there’s a warning sign, don’t wait.
Worried about a balcony?
Send us a few photos of the balcony, its supports and the guardrail: we’ll tell you whether a visit is needed and send you a written service proposal.
Scope of this guide. This content is general in nature. It does not replace a site visit or an engineer’s opinion on a specific building.
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