Royale Professional Gold Sonic Acoustic Underlay 7mm — 7.5m² Roll

The Royale Professional Gold Sonic is the highest-performing underlay in the Royale range — and one of the best acoustic underlays available for wood and laminate flooring in the UK market. At 7mm thick with a 37dB impact sound reduction rating, it significantly outperforms standard 2mm and 3mm underlays, making it the right choice for upper floor flats, apartments with noise regulations, period properties with uneven subfloors, or anyone who simply wants the best possible result underfoot.

Built using Royale's unique AeroFoam formula — a denser, stronger foam cell structure than standard foam underlays — it delivers exceptional levelling of subfloor imperfections while providing superior thermal insulation at 2.15 tog. The advanced gold foil backing acts as a high-performance damp-proof membrane, protecting your floor from moisture rising through the subfloor.

Specified by architects and high-end professionals in modern residential and commercial builds where the highest degree of soundproofing and thermal performance is required. If you are fitting flooring in a flat, a leasehold property with noise clauses in the lease, or a room above a garage or concrete slab, this is the underlay to choose.

Apply with the gold foil side facing down towards the subfloor. Use Barrier Pro X tape at joins to create a full moisture lock — tape sold separately.

KEY FEATURES 

• 37dB impact sound reduction — among the highest rated underlays available

• 7mm thickness — superior levelling of uneven or imperfect subfloors

• Royale AeroFoam formula — stronger, denser foam cell than standard foam

• 2.15 tog thermal rating — excellent heat insulation underfoot

• Advanced gold foil damp-proof membrane — high performance moisture barrier

• Suitable for all wood, engineered oak and laminate floating floors

• Specified in high-end architectural and residential builds

• Ideal for flats, apartments and leasehold properties with noise regulations

• Gold foil side faces down — use Barrier Pro X tape at joins

• 7.5m² coverage per roll (1m x 7.5m)

SPECIFICATIONS

Thickness: 7mm Sound insulation: 37dB impact sound reduction Thermal resistance: 2.15 tog Roll size: 7.5m² (1m x 7.5m) Brand: Royale Application: Gold foil side facing down Suitable for: Engineered wood, solid wood, laminate (floating installation) Not suitable for: Glue-down or direct stick installations

IMPORTANT NOTE 

Barrier Pro X joining tape is recommended for this underlay to seal joins and create a full moisture lock. Available separately — ask us for details.