To some extent i do agree that problem with flooring more often than not is due to installation issue. This is quite common recently for reasons that we dont need to discuss.
Though the key here is as a business owner if you sell the product and also do the installation for the customer and one year later the product fails, what do you think is fair or at least need to happen?
Fixing come at a cost, financially and mentally.
Doesn't really matter what the business owner thinks is fair.
Australian Consumer Law has always been clear, the customer's contract is with the seller of the product, not the manufacturer.
It's the businesses responsiblity to fix a faulty floor whether its an installation defect or manufacturing defect.
You can't fob off a customer and make them deal with a manufacturer.