• In 2015 a group of UC Berkeley students were outside on an apartment balcony and the balcony gave way killing 6 people, and injuring 7 others. This balcony failed because the floor joists holding up the balcony were rotted out because of dry rot. This dry rot, which is a type of wood fungus, was caused by moisture entering the joist space through holes and cracks in the deck surface above.
• As a result of this tragedy, in 2018, the California legislature passed Senate Bill – SB 721, known as The Balcony Inspection Bill, which requires apartment owners to have their elevated balconies, elevated walkways, and stairways inspected by a licensed professional every 6 years.
• If the inspection finds that there are deficiencies in the water proofing of the walking surface above the floor joists, or if there is dry rot or other damage to the structural members (floor joists), then corrective action must be taken to repair the floor joists, or seal up the walking surface above the joists to make it water tight, so that there is no water intrusion into the joist space.
• Water that leaks into the joist space promotes fungal growth on the wood joists, known as dry rot, which deteriorates the floor joists leading to possible failure.
• SB 721 also requires that the stairs are to be inspected for structural integrity.
• Click here to see California Senate Bill SB721 regulations.