Having an underlay installed on your floor makes both installation easier and provides the absolute best attenuation of footfall noise in the room. From Haro you can choose between two different substrates:

Silent Pro

Silent Pro on a PUR basis with mineral fillers ensures the best noise properties. Both reverberation and footsteps in adjacent rooms are significantly reduced. The high elasticity is similar to walking on a forest floor, which relieves both joints and spine. Also suitable for laying on top of underfloor heating.

This underlay can be used both when the floor is to be laid directly on concrete or on a wooden floor. Remember that vapor barrier foil must be laid [ https://gulvlageret.dk/haro-underlag-1049/dampspaerrefolie-26-m-p17191 ] when installing on a concrete floor.

Silent CT

Provides optimal quality and lightning-fast laying technique, as you simply pull off the foil on the glue tracks and lay the floor. There is no drying time and you can use the floor immediately. The substrate contains no harmful substances. When you walk on the floor, you will experience the pleasant acoustics of a floor that is glued over the entire surface. Suitable for underfloor heating.

Please note that this substrate should only be installed on a concrete floor with vapor barrier protection. Eg. this one: https://gulvlageret.dk/primer-fugtspaerre-768/ardex-ep2000-primer-og-fugtspaerre-p17125

When installing on plywood, the floor should be primed with a dust binder such as this one: https://gulvlageret.dk/haro-tilbehoer-voks-renovering-444/primer-p33902