Hi Geooff@YoungSt
I’d suggest you have a look at your insurance policy to see what you can claim with regard to the floating floor board damage. I don’t think from your post that the pipe burst but if it did it would be worth discussing with you SM about it being a insurable event.
Defect Warranty is 2yrs for minor and 6 years for major (in NSW), this link has more information (to understand what is considered minor / major etc):
My understanding if the you’re still under warranty it will only be considered a defect if its not compliant (to code) and / or poor workmanship ie if its been otherwise damaged or not maintained it will be your responisibility.