I don't think anyone here disagrees with the fact that what the customer wants and is willing to pay for in this case is anything other than a substandard installation my friend. And that is exactly why liability waivers exist. If you get carpet in your basement and don't want to pay for the right padding, the installation will never be warranteed. To protect the installer, a liability waiver is signed. I have a friend who does this for a living, has been sued a half a dozen times for this exact thing. Plaintiffs lawyered up or not, he has never lost. But he also records the conversation as well...