Crumb Rubber underlay

Rubber crumb underlay or rubber carpet underlay, is made from recycled rubber granules, often derived from used vehicle tires, which are bonded together to form a resilient and flexible material.

Here are some of the benefits

Sound absorption: Rubber crumb underlay helps to reduce noise transmission between floors by absorbing impact sound. It can minimise the sound of footsteps, furniture movement, and other noises, creating a quieter environment.
Cushioning and comfort: The resilient nature of rubber crumb underlay provides a comfortable and cushioned surface underfoot. It can enhance the softness and bounce of carpets, making them more pleasant to walk on.
Insulation: Rubber crumb underlay has insulating properties, helping to improve thermal efficiency by reducing heat loss through the floor. It can create a warmer and more energy-efficient living space.
Durability and longevity: Rubber crumb underlay is known for its durability and long lifespan. It can withstand heavy foot traffic without losing its shape or degrading over time, providing extended support for the carpet above.

Despite its benefits, there are a few potential downsides to consider:

Cost: Rubber crumb underlay is generally more expensive than other types of underlay materials such as foam or felt. The higher cost may be a factor to consider, especially for larger areas.
Height and thickness: Rubber crumb underlay tends to be thicker compared to other underlay options. This added thickness can raise the overall floor height, which might require adjustments to door clearances or transitions to adjacent flooring.
Environmental impact: While rubber crumb underlay is made from recycled rubber, the process of manufacturing and recycling tires has its own environmental considerations. It's important to ensure that the product is sourced from reputable manufacturers that prioritize sustainable practices.

It's worth noting it's specific properties and performance can vary depending on the manufacturer and the specific product. Do talk to your carpet fitter as well as the carpet provider to understand the suitability of this underlay for your specific needs and preferences.