After Friday's sudden fierce downpour, volunteers noticed that a significant leak in a downpipe leading into the costume department had caused a large flood, leaving water spread across the floor up to five centimetres deep in places.

SOACT president Mick Radatti yesterday said the flooding had caused water damage to at least half of all the costumes stored in the room and believes a lack of regular maintenance by Wagga City Council contributed to the leak.

"It's one of those ongoing dramas, we've just had enough," he said.

"The water ingress has been a problem for years and it's because they don't clean out the gutters.

"It keeps happening with regularity and we keep having to fork out to have costumes cleaned."

"They should at least do what's in the contract and do the maintenance."

While council officers were sent to investigate the flooding on Friday, Mr Radatti said those in attendance were less than impressed with the level of assistance offered.

Also of major concern is a section of the stage which has been affected by white ants and is now bowed.

Mr Radatti said the damaged stage was inspected two weeks ago and the group told to simply cordon off the area with no promise it would be fixed.

Manager of council businesses Grant Johnson yesterday said Friday's freak rain event had caused problems at a number of venues and tradesmen had been called to inspect the damage.

"The plumbers are looking at the whole building including the capacity of the guttering, it has gone on to contract plumbers and we're waiting to hear their assessment on that," he said.

Mr Johnson said council conducted reviews of all assets on an annual basis as part of council's management plan.

He said any additional maintenance issues should be flagged with council in order for action to be taken.

"Basically what we do with a tenant is that we rely on that tenant to bring maintenance issues to our attention," he said.

"I'm not aware of any outstanding requests from them."

With regards to the damaged stage, Mr Johnson said council were awaiting quotes from tradespeople before any further steps could be taken.