The construction union says two Sydney incidents involving brick walls collapsing in strong winds, including one that led to a man's death, show more regulation is needed in the industry.
A 30-year-old carpenter was killed after he was buried under a collapsed wall at Carlingford, in Sydney's northwest, on Wednesday morning.
The man's colleagues raced to free him but he entered cardiac arrest and couldn't be revived by paramedics.
A SafeWork NSW investigation is underway, however CFMEU state secretary Brian Parker said the watchdog had moved towards self-regulation rather than regulating the industry.
"They are asleep at the wheel they should know these issues about wind and what could happen and put warnings out," Mr Parker told AAP.
A similar but separate incident left a 19-year-old man badly injured when he was crushed by a wall in Kellyville.
The teenager was in a serious but stable condition in Westmead Hospital on Wednesday evening.