Laminate flooring also requires underlayment between the laminate and the floor. Some types of laminate come with attached underlayment; otherwise you will need to purchase a roll of underlayment. As of 2014, the cost of laminate flooring averages $1 to $6 per square foot.The cost of underlayment, fasteners, adhesives and surface sealants averages 32 cents per square foot as of 2014, with rolls typically sold in units of 100 square feet. It will cost an additional $50 to $66 to rent the equipment for the job.ome types of laminate come with attached underlayment; otherwise you will need to purchase a roll of underlayment. As of 2014, the cost of laminate flooring averages $1 to $6 per square foot.