I'd be going back to the architect/designer and asking why the vent wasn't on the plans then armed with that info, I'd be asking your Turkey of a Supervisor why if it wasn't on the plans he didn't flag and insist on being given the EXACT code that he's referencing (including the details so that you can review yourself) as last time you checked YOU WERE THE CLIENT - It's a shame you've had this happen - your home looks as though it will be stunning, but others have said it wont be so noticeable when the building is done completely. The placement kind of makes sense since heat rises so you'd want it to be as close to the highest point for maximum effectiveness but you should have been aware. Check on the builders itemized estimate to make sure that you didn't miss it by accident so that if you did accidentally miss that one line item on a list of a million you able to prepare your argument accordingly.

Could you put a photo please?

I came accross this company the other day, maybe they could answer your questions? https://www.instagram.com/sydneyepoxygroup/

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