how wide and long can I go

Hello! Laminate flooring is installed as a floating floor and requires the use of T-moldings in doorways 4 ft (1.22m) or less and in rooms 40 feet (12.2 m) or larger in length or width. Floor movement must not be constrained by glue, nails, screws, hardware or other fixed obstructions. Thank you for your QuickStep inquiry. -Amy