The often-underestimated yet vital layer of support beneath our beloved carpets – underlay! Whilst not the star of the show, carpet underlay plays a significant role in the performance, longevity, and comfort of your carpet.
In this guide, we will take you through the key factors to help you understand which is the best carpet underlay for your home.
Perhaps you're overhauling the flooring in your living room or laying down a luxurious new carpet in the master bedroom – either way, choosing the right carpet underlay is as important as the carpet itself. Let's get into it!
Benefits of Carpet Underlay
The benefits of carpet underlayment for carpet extend far beyond the initial underfoot softness. Here's why it's non-negotiable:
- Comfort: Provides a cushiony layer for a more comfortable walking and living space.
- Durability: Extends the life of your carpet by absorbing the impact from foot traffic.
- Insulation: Acts as an insulating layer, helping to keep your home warm and reduce energy bills.
- Noise Reduction: Significant in soundproofing, especially in multi-level homes.
- Moisture Protection: Guards against damp and rising moisture, preserving the floor and carpet above.
Different Types of Underlay and Their Strengths
Each type of underlay has its own set of features that cater to different needs and preferences. It's essential to consider the minimum performance criteria or specifications for each underlay type to ensure it meets the homeowner's needs.


Crumb Rubber Underlay
Crumb rubber stands as an eco-friendly option that is highly durable, with excellent impact absorption and soundproofing. This makes it an impeccable choice for high-traffic areas where resilience is paramount, such as hallways and stairs. However, it may not offer the same level of comfort as other types.
PU Foam Underlay
Polyurethane (PU) foam underlay is a lightweight and versatile option. It offers good levels of comfort and insulation – a competent all-rounder suitable for most rooms in the house. The balance it strikes between cost and benefits makes it a popular choice for many. If you're looking for a high-quality PU foam underlay, explore our Tredaire underlay range for exceptional comfort and durability.
Felt Underlay
Traditional felt underlays provide basic cushioning at a budget-friendly cost. Ideal for those who value an amenable price point, it has its place in settings where heavy wear and tear aren't major concerns.
Combination Underlay
Looking for a balanced mix of benefits? Look no further than combination underlays. They offer a blend of comfort, insulation, and soundproofing, making them a great middle-ground option.
Finding Your Perfect Match: Choosing the Right Underlay
When it comes to choosing the right underlay, there are several key factors to consider. For example, a rubber underlay might be best suited for a luxurious, deep-pile carpet in a living room, offering both comfort and durability, while a thinner, foam underlay carpet could be more appropriate for a low-traffic area like a bedroom, where comfort is a priority over durability.
Carpet Type
- The underlay you select should complement the type of carpet you have chosen.
- Thicker underlays work best with plush carpets, ensuring they don't flatten over time.
- Conversely, thinner underlays suit low-profile carpets.
Room Usage
- Consider the level of use the room will receive.
- High-traffic areas benefit from more robust underlays like crumb rubber.
- Bedrooms and living areas can benefit from a softer PU foam or combination option.
Subfloor Type
- The condition of your subfloor will dictate the optimal thickness of the underlay.
- An uneven subfloor may require a thicker underlay to level and cushion effectively.
Insulation Needs
- The best carpet underlay for insulation is one with a high TOG rating.
- A thick PU foam underlay or a high-density felt underlay generally provides better insulation than a crumb rubber underlay.
Budget and Long-Term Value
- While not the most glamorous of purchases, quality carpet underlay is an investment that can save you money in the long run.
- This is because the right underlay can increase the lifespan of your carpet.
Same Underlay Throughout or Room-Specific Choices?
While using the same underlay for carpets throughout the home is a common practice, there can be benefits to choosing different underlays for specific rooms.
For personalised advice on selecting the right underlay for each room or for more general flooring advice, get in touch with our friendly team!
High-Traffic Areas
The best carpet underlay for high-traffic areas, such as stairs or hallways, is typically a dense, durable material like a thicker crumb rubber. It can withstand heavy foot traffic and provide excellent sound insulation.
Bedrooms and Living Spaces
Opt for a plusher underlay for bedrooms and living spaces to add a touch of luxury. PU foam or combination underlays offer the perfect blend of support and softness. The best carpet underlay for living room areas should provide comfort without sacrificing longevity.
Stairs
A dense, firm underlay like crumb rubber or a heavy-duty PU foam is often recommended as the best carpet underlay for stairs carpet. These materials ensure the carpet retains its shape and appearance over time, preventing premature wear and tear in such a critical area of the home.


Moisture-Prone Areas
For areas prone to moisture, consider carpet padding that features an integrated moisture barrier, providing an added layer of protection against spills and dampness.
Pro Tip: Always consult the manufacturer's recommendations for your chosen carpet to ensure underlay compatibility and warranty coverage. Additionally, when having your carpet professionally installed, inquire about their best carpet underlay and recommendations to get the best outcome.
Feeling Inspired?
As you shop for a new carpet, take a moment to consider the underlay – it truly is the foundation of a well-carpeted home. Choosing the right underlay for your carpet is a thoughtful process that can greatly enhance your home's comfort and durability.
For further guidance and a wide selection of underlays, explore our range to discover the perfect pairing.