Depending on the manufacturer these guidelines may vary:
The floor covering, adhesive, and room temperature must be kept with in a temperature range of 65°F to 100°F for at least 48 hours before, and 48 hours after installation. In certain cases where epoxy adhesive is used, the temperature should not exceed 85°F.
The flooring material should be allowed to acclimate to the temperature of the area it will be installed for at least 48 hours in advance.
Start with a clean jobsite, a prepared subfloor and remove any items that may damage a finished installation. Substrates must be dry, clean, smooth, and free from paint, varnish, wax, oils, solvents, adhesive from former flooring and other foreign matter.
A properly prepared subfloor is important because the wrong type can telegraph through the new floor. This will not only be unattractive, but it will cause uneven wearing. Underlayment panels are intended to provide a smooth working surface, but are not designed to correct or properly cover structural deficiencies.