How long does carpet underlay last?

Author: Barney Nader  |  Last update: Saturday, March 28, 2026

Underlay can last anywhere between 5 and 20 years. Foam and Felt underlay can last up to 8-12 years. However, if foam underlay isn't properly installed or maintained, it lasts only 5 years. Acoustic and rubber underlay have the longest lifespan, lasting 10-20 years.

How often should I change my carpet underlay?

How often should you replace carpet underlay. Although a typical carpet underlay will last somewhere between 10 and 25 years, we would always recommend installing new underlay every time you replace your carpets.

How do you tell if you need a new underlay?

If your carpet is looking worn out, then so is the underlay. Old underlay will already be flatter and worn out, unable to cushion the everyday footfall throughout your home and protect the pile surface of the carpet.

Can you use old carpet underlay?

Most carpet manufacturers require new underlay to be installed at the same time to validate their warranty. Furthermore, reusing old underlay can result in the new carpet wearing in the same pattern as the old one, decreasing its lifespan.

Is it worth replacing carpet underlay?

Short answer - Yes. Underlay definitely does prolong the life of your carpet as well as making it feel better. If you are having an expensive carpet, then go for the best quality underlay you can afford. The difference really is noticeable.

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Why is carpet underlay so expensive?

It goes without saying that the more there is of a particular underlay, the more you can expect it to cost. This applies to both thickness and density. Thicker products quite clearly mean more material has been used to produce it, which means a higher cost. But density plays a huge part too.

Does underlay deteriorate?

Foam and Felt underlay can last up to 8-12 years. However, if foam underlay isn't properly installed or maintained, it lasts only 5 years.

What is the best underlay for carpet?

Combination (felt/rubber) underlay is considered the 'best of both worlds because it combines the properties of two materials: the felt brings warmth and comfort, and the recycled rubber brings durability and sound reduction.

Is carpet OK without underlay?

Whilst it is possible to install carpets without underlay, the absence of underlay can compromise the comfort, durability, and performance of the carpet over time.

Is carpet underlay glued down?

Stick your underlay to your subfloor – use adhesive glue or staples to make sure that your underlay is firmly attached to your subfloor. Lay your carpet on top – Now you can have your carpet fitted on top. Remember that caring for your carpet is the most important way to look after your flooring and your underlay.

How much does good underlay cost?

What is the average price of underlay? The price of carpet underlay is calculated per m2 and – dependent on the supplier and the quality of the product – you can expect to pay anywhere between £2-£8.

Is thicker carpet underlay better?

Your choice of carpet won't have a huge amount of influence on the type of underlay you need. However, if you've opted for a carpet with a shorter pile height, you may want to add depth by choosing a slightly thicker underlay. This will provide extra cushioning without compromising on the style of your carpet.

How long does floor underlayment last?

Generally, quality underlay can last anywhere from 8 to 20 years, but various signs might indicate when it's time to replace the underlay, especially in high-traffic areas where wear and tear are more pronounced, such as staircases or commercial spaces.

How do you know if your underlay needs replacing?

If something doesn't feel quite right when you walk over it, it's highly likely that the underlay is wearing out and needs replacing. There may be spots that feel flat, lumps and visible signs of damage, or perhaps you can feel the hard floor beneath as you walk across in your stocking feet.

What is the life expectancy of carpet padding?

Thicker and firmer carpet padding can last up to 25 years. In high-traffic areas, the padding may last only about 10 years. Carpets with thick and firm padding last longer because they don't tear or wear easily.

At what age should carpet be replaced?

Eventually, even the best-laid carpets must be replaced. While regular upkeep can increase your carpet's lifespan, most manufacturers estimate you'll need a full replacement after about 10 years.

Is expensive carpet underlay worth it?

Good quality underlay will prevent premature wearing and keep your floor looking new for longer. As the underlay acts as a shock absorber, your flooring or carpet will sit better and take more wear. The best type of carpet underlay will reduce your energy bills as it will keep the heat in your room.

Do modern carpets need underlay?

Yes, underlay for carpet is typically necessary as it enhances comfort, extends carpet life, and improves thermal insulation and soundproofing.

Can you lay new carpet over old underlay?

First, how old is the existing underlay? If it's more than six years old then we'd strongly recommend changing it. This is because using old underlay beyond its life expectancy can reduce the life of the new carpet laid over it.

Is it worth upgrading carpet underlay?

A quality pad will make the carpet feel softer and cushioned to sit on, lie, and play. The pad also offers thermal insulation, providing an extra layer between the cold floor and carpet to keep the home warmer.

What thickness of carpet is best?

Medium pile – 7mm to 13mm

Medium pile carpets are the Goldilocks of the carpet world. Being able to be soft and hardwearing.

Is rubber or foam underlay better?

PU foam is the most recommended underlay for carpet given it's luxurious cushioning and comfort underfoot. It's great for keeping in the heat, reducing sound levels and available in different types of thickness, density and quality which suits all budgets.

How often should I replace carpet underlay?

How long does carpet and underlay typically last? Carpets usually last between 5 to 15 years, depending on the material and foot traffic. Underlay should be replaced every 5 to 10 years, but this can vary based on quality and usage.

Is there asbestos in old carpet underlay?

In the 1960s and 1970s, underlay was often made using recycled hessian bags which contained asbestos, and installed in many homes. Therefore, if you have an older carpet underlay, you may need to have asbestos analysis carried out to ensure it doesn't contain this dangerous mineral.

What happens if carpet underlay gets wet?

Structural Damage: Prolonged exposure to water can break down the materials in the padding, leading to deterioration and ineffective padding. Health Hazards: Wet padding can harbor bacteria and allergens, which can be especially concerning for households with allergies or respiratory issues.

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