Heavy rain shouldn't be a concern to Christchurch's Cardboard Cathedral now the roof has been completed.
Chunks of the cardboard pipes have had to be cut away and replaced after becoming sodden with recent bad weather.
Anglican Church spokesman Jayson Rhodes says they were expecting this in the construction stage.
"Some of the cardboard got wet when the building was not fully enclosed, so before the roof was completed people may remember the tubes were wrapped to try and protect them from the weather. The roof is now enclosed and then finished so that same risk doesn't exist.
"It's nothing to be worried about at all. The builders anticipated this would happen. It's just cosmetic. On a building site you get a broken window, likewise on a building site with cardboard you can get wet cardboard. The building is everything it's promised to be and only weeks away."
Mr Rhodes says it's simply cosmetic damage and the multi-million dollar transitional cathedral is still on track to open next month.