UNDERSTANDING WHY BALCONIES COLLAPSE Balcony failures are more common than people realize. They are often due to a combination of structural issues, material degradation, and lack of maintenance. Some of the most common causes include:
1
Dry Rot and Water Damage
• Moisture infiltration is one of the biggest threats to balconies. Over time, wood framing can absorb water, leading to dry rot, a fungus that weakens the wood’s integrity. • Hidden water damage beneath paint or sealant can go unnoticed for years until it causes a catastrophic failure.
2
Corrosion of Metal Components
• Steel reinforcements, nails, and fasteners can corrode if not properly protected against moisture. • Rusted metal connections lose their load-bearing capacity, leading to sudden structural failure.
3
Overloading and Poor Construction Practices
• Many balconies are designed to hold only a specific weight limit. Exceeding this weight, especially with multiple occupants, heavy furniture, or plant pots, can strain the structure beyond its capacity. • Poor construction techniques, cheap materials, and lack of reinforcement also contribute to collapses.
4
Lack of Routine Inspections & Maintenance
• Deferred maintenance is one of the leading causes of balcony collapses. In California, property owners are legally required to inspect exterior elevated elements under SB721 and SB326. • Small cracks, leaks, or rotting wood can worsen over time, leading to catastrophic failure.
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