The block had to halt filming after a disturbing discovery

The block had to halt filming after a disturbing discovery

The block was forced to halt filming following a disturbing discovery at the home

The block was shut down immediately after a potentially deadly discovery was made by a candidate during demolition.

Melbourne plumber Tom made a startling discovery Monday night near the end of the demolition process for his and his wife Sarah-Jane’s guest bedroom.

“As soon as I saw it I was like, ‘Oh god here we go, more delays,'” he explained.

The block was immediately closed during Monday night’s episode after a contestant made a potentially deadly discovery during the demolition

The block crew moved quickly once the deadly substance was discovered and identified as asbestos.

‘They’ve closed our house, and asbestos is very dangerous, rightly so,’ explained Tom.

Hours later, site supervisors Keith Schleiger and Dan Reilly returned to the site to give the all-clear that work could resume.

Melbourne plumber Tom (left) made a startling discovery as he neared the end of the process of demolishing his and his wife Sarah-Jane's guest bedroom.  Pictured together

Melbourne plumber Tom (left) made a startling discovery as he neared the end of the process of demolishing his and his wife Sarah-Jane’s guest bedroom. Pictured together

Dan offered an explanation as to why the asbestos had not been discovered before the homes were handed over to the candidates.

“In this place, under the chimney and used as formwork, it is very difficult to find. That’s why we didn’t find it – Tom did the right thing when he alerted us,’ he said.

Channel Nine’s new season of The Block beats the competition.

Hours later, Keith and Dan returned to the site to give the all-clear that work could resume

Hours later, Keith and Dan returned to the site to give the all-clear that work could resume

The reality TV home makeover series garnered an impressive 984,000 viewers on Sunday, making it the most popular entertainment show of the evening.

Elsewhere in the episode, actress Sharon Johal was beside herself with rage when she and partner Ankurs were the last to get into the bathroom at the revelations.

The block continues on Tuesday at 7.30pm on Channel Nine

The block continues on Tuesday at 7.30pm on Channel Nine

The block continues on Tuesday at 7.30pm on Channel Nine