Diall 5mm Wood fibre Laminate & solid wood flooring Underlay panels, Pack of 15 | DIY at B&Q
ProCore Plus Jamestown Hickory 7-in Wide x 5-mm Thick Waterproof Interlocking Luxury Vinyl Plank Flooring (23.21-sq ft) in the Vinyl Plank department at Lowes.com
Sylpro Acoustic Underlay 5mm for Wood, Parquet and Laminate Floors