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There are two different types of underlay that you can install under your laminated flooring.
Combi - Underlay - this is the standard underlay consisting of black or blue plastic and aerothene foam. It is used on normal, level floors.
Rubberlay -this is a rubber underlay that provides excellent thermal insulation, keeping rooms both cooler in summer and warmer in winter. It has accoustic dampening qualities providing noise reduction, and assists in minor floor levelling. To a certain level it also provides insulation against moisture and dampness.
HINT Black building plastic should still be used with rubberlay as a moisture barrier
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