The ultimate balance between luxurious comfort and extreme durability.The Royale 600 underlay is a high-quality solution for those seeking enhanced walking comfort without compromising on wear resistance. This underlay is made from 'flat sponge rubber', a material known for its excellent resilience and long-lasting support. Thanks to its heavy contract use classification, this product is not only suitable for luxury residential construction but also for high-traffic areas in commercial projects.💡 Expert TipWhen using Royale 600 under a stretched carpet, you will immediately notice the difference in acoustics and thermal insulation. For underfloor heating, ensure that the total thermal resistance (Tog value) of the underlay and carpet combination does not become too high, so that the efficiency of your heating remains optimal. Stretching the carpet is essential here to guarantee good heat transfer.