This 5.5 mm Fibreboard Underlay is ideal for flattening uneven floors with imperfections up to 2mm in height or depth.
 
Whether you have a problem with buldging under floor boards or cracked and scratched concrete with rough surfaces this underlay helps a great deal. 
 
To get the best out of your Wood or laminate flooring you need to ensure it is laid on top of uneven/flat sub-floor. To acheive this Fibreboard is used as your most effective solution.