Description
Isotac Gold 5 mm acoustic underlay
Isotac Gold is a gold-coloured XPS underlay for a compatible parquet, laminate or floorboard construction. The leaflet lists a thickness of 5 mm and dimensions of 0.8 × 6.25 m, covering 5 m². It is supplied as a folding underlay with an interlocking connection. Please note: MacLean states that this version is unsuitable for underfloor heating or cooling. Choose an approved alternative for a heated floor.
Sound ratings and apartment requirements
The manufacturer lists 10 dB ΔLlin. This is a particular measure of impact sound, not a guarantee that every sound in your home will decrease by 10 dB. ΔLlin and ΔLw are different quantities. For owners’ association or landlord requirements, have the test report and specified combination of structural floor, underlay and flooring assessed. A product name alone does not establish approval for your apartment.
Check the substrate and installation
The manufacturer lists local conformability up to 4 mm. This does not replace checks on flatness, moisture and strength. Follow the leaflet for layers, joints and vapour-tight finishing, together with the flooring manufacturer’s instructions. Allow for cutting waste when calculating quantities. We help private and business end users, installers and wholesalers choose based on the substrate, flooring and required acoustic documentation. Confirm the sales unit and terms before ordering.