When it is known that sub-floor flatness, moisture levels, ambient relative humidity, temperature etc. are not at recommended levels and yet the building owner and/or General contractor are insisting you start the installation against your better judgement, get it in writing! If you don't have clear written instructions from the Building owner to proceed then you won't fare well in court should you be sued.
Our advice is as Follows:
1. Say 'no' and wait for job site conditions to meet manufacturers’ recommendations before proceeding.
If 'no' is not an option then:
Write a letter to the Building owner and General contractor stating why you recommend delaying the installation and also stating that proceeding will void the product and installation warranty. do not proceed with installation until you are in receipt of written instructions from the Building owner that states they fully understand the risks and wish to proceed against manufactures’ specifications with no product warranty in place.