Do You Need Underlay for Laminate Flooring?

If you're planning a new laminate floor, one of the most common questions is whether you actually need underlay underneath it. The short answer is: in most cases, yes. Underlay plays an important role in how your floor feels, sounds and performs over time.

That said, the right answer depends on the type of laminate flooring you're installing, the subfloor underneath, and whether your boards already come with an attached backing. In this guide, we'll explain when underlay is needed, when it is not, and how to choose the right option for your room.

The short answer: yes, most laminate flooring needs underlay

Most laminate flooring should be installed over a suitable underlay. Laminate is generally laid as a floating floor, which means the boards click together and sit on top of the subfloor rather than being glued or nailed down. Underlay creates the layer between the laminate and the surface beneath it.

Without the right underlay, laminate flooring can feel harder underfoot, sound louder when walked on, and be more likely to suffer from movement, uneven support or premature wear.

What does underlay do under laminate flooring?

Underlay does far more than simply add a bit of cushioning. A good laminate underlay helps with:

• Smoothing out minor subfloor imperfections so the laminate has more even support
• Reducing noise both in the room and, in some cases, to rooms below
• Adding comfort underfoot compared with laying directly onto a hard surface
• Supporting the click system by reducing excess movement
• Helping with insulation depending on the product you choose
• Providing moisture protection where a built-in vapour barrier is required

In short, underlay helps your laminate floor perform properly and often improves the finished feel of the room.

When do you need underlay for laminate flooring?

You will usually need underlay for laminate flooring in the following situations:

1. When the laminate does not have attached underlay

This is the most common scenario. If your laminate boards do not have an underlay or backing already attached, you will normally need to install a separate laminate underlay underneath them.

2. When laying over concrete subfloors

If you are installing laminate over concrete, underlay is especially important. Concrete subfloors may need moisture protection as well as cushioning and support, so you will often need an underlay with an integrated damp proof membrane or vapour barrier.

3. When you want better sound reduction

If the room is upstairs, in a busy family home, or in a flat where noise matters, underlay can help reduce the hollow sound laminate can sometimes have.

4. When the subfloor is slightly uneven

Underlay can help take up very minor imperfections, although it will not fix a poor subfloor. Large dips, ridges or movement in the base should be dealt with before the laminate is installed.

When might you not need underlay?

There are a few cases where a separate underlay may not be needed.

Laminate with built-in underlay

Some laminate flooring comes with an attached underlay layer already fixed to the back of each board. In that case, you typically do not add a second underlay underneath unless the manufacturer specifically says you can.

Adding an extra layer under laminate with built-in backing can create too much movement in the floor, which may damage the click joints over time.

Very specific installation systems

Some manufacturers specify particular installation methods or compatible accessories. Always check the fitting instructions for your chosen floor, because the product guidance should take priority.

Can you lay laminate flooring without underlay?

Technically, in some situations, you can. But in most cases, it is not recommended.

Laying laminate directly onto the subfloor without underlay can lead to:

• More noise underfoot
• A harder, less comfortable feel
• Poor support for the click joints
• Increased wear from minor subfloor imperfections
• Potential moisture issues if installing over concrete

Skipping underlay to save money often ends up being a false economy, especially if it affects how the floor performs long-term.

What type of underlay do you need for laminate flooring?

The best underlay for laminate flooring depends on where the floor is being installed and what sits underneath it.

For concrete subfloors

You will usually want an underlay with built-in moisture protection. This helps protect the laminate from residual moisture rising from the subfloor. If you're installing over concrete, it is worth browsing the full underlay collection to compare suitable options.

For wood subfloors

A standard laminate underlay may be suitable, provided the subfloor is sound, dry and level enough for installation.

For rooms with underfloor heating

You should choose an underlay that is specifically suitable for use with underfloor heating. These are designed to allow heat to pass through efficiently while still supporting the laminate above. If you're fitting flooring over a heated system, it is worth exploring suitable underlay options before installation.

For better sound reduction

If noise is a concern, look for an underlay designed to reduce impact sound and improve acoustic performance.

How thick should laminate underlay be?

Many people assume thicker underlay is always better, but that is not necessarily true with laminate flooring.

Laminate floors need the right balance of support and stability. If the underlay is too thick or too soft, the floor may flex too much underfoot, which can put pressure on the click joints and reduce the life of the floor.

In general, it is best to choose an underlay recommended for laminate flooring rather than simply picking the thickest option available.

Does underlay make laminate flooring warmer?

Underlay can help improve comfort and insulation slightly, particularly over colder subfloors, but its main purpose is not to act as a heavy insulating layer. It is there to support the floor, reduce noise and, in some cases, help manage moisture.

If warmth is a big priority, the room, subfloor and overall flooring specification matter just as much as the underlay itself.

Does underlay help with laminate flooring noise?

Yes, underlay can make a noticeable difference to how laminate flooring sounds. One of the biggest complaints with poorly installed laminate is that it sounds hollow or loud underfoot. A suitable underlay helps soften that effect and can improve the overall feel of the room.

This is especially useful in upstairs rooms, hallways and busy living spaces.

Recommended Underlay for Laminate Flooring

Choosing the right underlay can make a big difference to how your laminate floor performs. Here are some popular options to consider:

If you're still deciding, you can also browse the full underlay collection to compare the different options available.

Common mistakes to avoid

• Skipping underlay altogether when the laminate requires it
• Using the wrong type of underlay for the subfloor or room
• Using underlay that is too thick or too soft for laminate click systems
• Adding extra underlay beneath boards with built-in backing
• Using underlay to try to fix an uneven subfloor instead of preparing the base properly

Final verdict: do you need underlay for laminate flooring?

In most cases, yes, you do need underlay for laminate flooring. It helps support the floor, improves comfort, reduces noise and can provide important moisture protection depending on the subfloor underneath.

The key is choosing the right underlay rather than just any underlay. The best option will depend on whether you're laying over concrete or wood, whether you have underfloor heating, and whether your laminate already includes an attached backing.

If you're unsure, it is always worth checking the flooring manufacturer's fitting guidance before installation.

Shop laminate underlay at Flooring Revolution

Choosing the right underlay can make a big difference to how your laminate flooring looks, feels and performs over time. At Flooring Revolution, we offer quality underlay options to suit laminate flooring, including solutions for sound reduction, comfort and underfloor heating.

Shop underlay or explore our full range of laminate flooring to find the right fit for your home.