Best Types of Carpet Underlays:
There is a range of carpet underlays to select from, the trendiest being polyurethane (PU) foam, rubber, and felt. PU foam is extremely popular as it gives an exquisite soft feeling underfoot.
Depending on budget, it is available in various thicknesses, and the bedroom could be the right place to install a PU foam underlay. Rubber foam is great at soundproofing and protecting the carpet. It comes in two variants, sponge and rubber crumb.
Carpet underlay should always be a perfect combination of density and thickness. So, high-density sponge and crumb rubber types are the best materials for reducing airborne sounds. They add mass into a partitioning wall or floor, which helps decrease the sound between rooms.
Felt underlay is a convenient alternative with high wool content, making it perfect for thermal insulation. You can get underlay for luxury vinyl made of rubber which helps the tiles stick to it, thereby reducing the noise.