Frame exposed to weather for 6 months

Hi I have a similar issue with the bad timber frame.
Our builder left the timber outside for about a year to dry in the sun and get wet in the rain.A lot of timber was blackened with mold. We complained about it to them. They said they don't use bad wood for frame. But when they made the frame of the house, they used a considerable amount of that bad timber. We made an appointment with them for our private inspection of the frame. They had booked a date with our inspector, but suddenly they started putting the plasterboard. We complained to them about it. But they said that it happened because of a miscommunication between them. But they did not stop the plaster boards. We complained about it until the plasterboard was finished. But they didn't care about any of that and ended up plasterboarding. We kept saying and still saying that we want an frame inspection. We know there's a lot of bad timber in there. Currently, the work has been stopped by placing plaster boards. We are still of the opinion that we need a private inspection. Is it good for us to have such an opinion? We have photos of bad timber. There are photos of moldy Timber. We have filed a complaint with Consumer Affairs too. The builder keeps telling us to come to the meeting with them. But we tell them that we want an inspection. If we allow them to proceed without inspecting the frame, can it affect the health of even the children living at home in the future? What other appropriate steps should we take?

There was no miscommunication! Its standard practice for volume builders such as Metricon etc. to fix the plaster asap in this situation to cover up any defects and allow the fixing stage invoice to be issued. Suggest you have a meeting on site and you or your inspector spends a good few hours physically checking if ALL the walls, celings and corners are straight within agreed tolerances. If these are not straight the builder will need to remove the plaster boards and straighten the frame then fix new plaster before they can issue the fixing invoice. At this point you may be able to inspect the timber. Mould spores are a health risk and remediation requires them to be physically removed from timber with microfibre cloths and a HEPA filter vacumn cleaner. If not removed, In high humidity they will activate and spread and can damage property as well as respiratory health. Buy your own basic checking equipment and ask the site supervisor to also bring his tools and assist. Take plenty of photos and notes of what he says.

We pointed it out to certifier at frame stage inspection and he directed builder to engage mold cleaners to clean off mold before gyprock, seem to have come off and we cleaned a bit more ourselves to make sure all is gone, that is one of building issues.