The two women are now working together to clean Te Kawau Stream.
"We're going to bring down our staff to sweep the stream and we're asking the public if they would like to come down and give us a hand," says Iversen.
Karaitiana will be managing the health and safety on the clean-up day, November 19.
Both women agreed that to be successful in these clean-up days requires buy-in from the community.
Meanwhile Iversen said Smith and Son's waste will be relocating to larger premises on Armstrong St where they will be setting up waste minimisation and recycling stations for demolition materials.
"We will have free untreated timber and materials for the public to help themselves.
"We have also connected with Reclaimed Timber Traders who find creative ways to reuse treated timber."
Iversen said waste minimisation in the construction industry was a huge challenge but they were being creative in their approach.
She is putting out the challenge to other city businesses to join the waste minimisation movement.
"We would like to see cleaning Te Kawau Stream as a regular event, and we are also interested in helping with local native planting sessions too.
Iversen added there will be a sausage sizzle for those who come to help.
If you would like to help with Te Kawau Stream cleanup. Meet at the bridge on Highbury Ave near the Highbury shops at 8.30am, November 19.