Can I Lay Laminate Flooring Over Carpet Underlay. Most laminate flooring underlayment is 1mm to 3mm thick. Put simply, carpet underlayment is too thick. Put down the underlay, gripper rods and whatever else it takes to lay a carpet and it should be fine.
Why it's a bad idea to lay laminate flooring on top of carpet and similar products. Would it not be less expensive, faster, more conservitive, and more beautiful to refinish the existing wood floor? Carpet padding is too thick and soft for the laminate to lay properly without movement.
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In general, the underlay for laminate flooring is between 1mm and 3mm thick, while most carpet. Before fitting laminate flooring, think about which direction you would like the board to lie in. These types of carpets should not have laminated floors installed over them as they will not provide enough stability to support your floor. If you try to lay it over carpet you are really asking for trouble.