What is the recommended clearance needed to allow the floating Pergo Max laminate flooring to expand?

Thank you for your interest in Pergo. Pergo flooring is designed to be installed as a floating floor — thus it is not nailed or glued to the subfloor. Instead, planks are fastened together utilizing unique tongues and grooves to create a durable, easy-to-maintain floor surface. Because Pergo flooring expands and contracts with temperature/humidity changes — it is essential that a 3⁄ 8" expansion space be left around the floor’s perimeter.