WHEN these Perth housemates woke to find their lounge room ceiling had collapsed they thought they should take pictures of the damage - then this happened.

It was just after 6am when Naomi Wise walked into her kitchen to fetch a glass of water when she noticed a large crack across the ceiling.

Even though she said she was half asleep, she thought it looked like it could become an issue.

"I was just watching then I heard a bang. It collapsed," she told PerthNow. "There was a guy sleeping on the sofa - he was lucky he didn't get hurt. He was right underneath.

"After that I called everyone else out and we thought it was funny so we started taking photos then more of it fell down. It sounded like an earthquake."

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That moment was captured on Zac Werner's phone.

In the footage, you can hear the housemates laughing about their unfortunate circumstances, showing the damage to their home. Then, as they point out the two-metre drop, more of the ceiling collapses.

The group of friends then quickly scatter with Mr Werner rushing outside coughing.

Despite appearing jovial about what happened in the footage the housemates are worried about the integrity of the home telling PerthNow they have been allowed to walk freely around the house.

Ms Wise said an electrician had been out to the home as well as two builders with both disagreeing on the overall structural safety of the Bateman home.

"One said it could collapse further the other said it would be fine, so it's 50/50," she explained."I'm not very happy about it at all"

This morning's collapse is not the first time the group has had a problem with the ceiling.

Ms Wise said the ceiling had been fixed for water damage in September.

And while the housemates said they were told the ceiling would be fixed as soon as possible, Mr Werner said the pair both he and Ms Wise were forced to find alternative accommodation for this weekend while their two other housemates were had no choice but to stay there for the weekend.