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The Daily Insight

Do you need to put underlay under laminate flooring

Author

Olivia Owen

Published Apr 07, 2026

Underlayment for laminate flooring is a must. Since laminate is a floating floor, it must be evenly distributed across your subfloor. Underlayment is what allows the floor to float, gives it stability, support, noise reduction, and supports the locking systems in between planks to assure the sturdiest flooring project.

What happens if you don't put underlayment under laminate flooring?

If the subfloor in your home or property is uneven, then your laminate floor could move and shift if it doesn’t have an underlayment for support. As a result, the floor will be more prone to wear-and-tear and could even warp. The more stability, the less likely you’ll have to pay out of pocket for costly repairs.

What type of flooring does not need underlayment?

However, you’ll want to use one in every other application including covering existing hardwood floors, vinyl flooring that isn’t cushioned, and concrete floors. You also do not need an underlayment if your vinyl plank flooring has underlayment installed, however, you may need a vapor barrier.

What is the best thing to put under laminate flooring?

A cork underlayment can provide good insulation and natural antimicrobial capabilities, so you won’t have to worry about mold growth between your subfloor and vinyl or laminate flooring. If you want to increase your moisture barrier, you can easily do so by placing a sheet of plastic under the cork underlay.

Can u use carpet underlay for laminate flooring?

Although re-using your underlay may be appealing, using a carpet underlay with laminate flooring will cause problems in the long run. … If you install laminate on top of a carpet underlay, the floor will be too bouncy and spongy, which can damage the locking system and provide an uncomfortable feel.

Can laminate flooring be installed on uneven floors?

You should not put laminate on an uneven floor. … Laminate that is installed on an uneven floor will settle into the uneven surfaces. This will affect the quality of the final product. The dips in the subfloor will create an air gap under the boards, which is what causes laminate floors to pop and creak under your feet.

Is 8mm laminate flooring any good?

8mm laminate floor is one of the most popular flooring options. It seems to be the happy medium between thick and thin laminate flooring options and provides ideal stability and easy installation. The 8mm thickness is enough to overcome any subfloor imperfections and create a sleek flooring solution.

Is 5mm underlay good?

Warmth and thickness – 5mm is the thickest you can go for laminate which means this product will provide the ultimate cushioning and warmth. Noise reduction – the rating of 22db allows this product to greatly reduce the sound of impact noise in your home.

Can you put 2 layers of underlay under laminate?

No, it is not recommended to install a thick or double layer of underlayment with laminate flooring. … If you install any additional underlayment, the base for your flooring will end up being too soft and could jeopardize the integrity of the locking system.

Can you lay laminate flooring over concrete?

Laminate flooring can be installed over concrete, wood or carpet subfloor or other surfaces. Installation of good quality underlayment is highly recommended. Installing underlayment is easy but it has to be done precise to avoid any tears.

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Is 12mm laminate worth it?

Laminate flooring should be between 6-12mm thick. If you find thicker than 12mm, it’s an inaccurate measurement–possibly including attached padding. If you want the highest-quality, hardwood feel, you’ll want 10 or 12mm. If cost is a concern and you have a smooth subfloor, you can get by with 7 or 8mm.

Is there a big difference between 8mm and 12mm laminate?

8mm is standard thickness, good quality, good price, durable enough, environmentally. 12mm is thicker flooring, same quality as 8mm, good walk-feeling, not so much noisy, high price. If you like the laminate flooring to look and walk similarly with hardwood flooring, you can take 12mm.

What does 12mm laminate mean?

Laminate flooring is available in various thicknesses ranging from 6mm to 12mm. 12mm laminate flooring is exactly what it sounds like. It is 12 millimeter thick laminate flooring and is one of the thickest available laminate options. 12mm is equal to about 0.47in, just shy of half an inch.

Why does my laminate floor feels spongy?

A laminate floor that feels spongy can be caused by any of these 5 conditions: an uneven sub-floor, an underlayment issue, an expansion gap issue, water damage, or termite damage. … It is also worth mentioning that an improper acclimation of the laminate floors prior to the installation could lead to soft spots overtime.

How soon can you walk on laminate flooring?

wait for the floor to cure Before you use your new floor or move into the room, make sure the floor is completely cured. Do not walk on the floor for 24 hours after installation. If you do, it will damage the installation, resulting in an uneven floor.

Why is my laminate floor lifting?

There are a few reasons why your laminate floor may be lifting, such as moisture under flooring, lack of proper expansion spacing, improper installation, climate change, or uneven slab or subfloor surfaces. Lifting, buckling, warping, or peaking in laminate flooring is unsightly and potentially unsafe.

Can laminate be laid over laminate?

Laying laminate flooring over old laminate is possible but there is product that you may have to spread on the old flooring first so that the old pattern doesn’t wear out under the new one. Make sure that you use a specific type of glue or adhesive that is recommended for gluing laminate tiles.

Should I reuse underlay?

Most of the time, you shouldn’t reuse old underlay. We recommend that you buy and fit new underlay at the same time as your new flooring. Old underlay can disintegrate as it ages, as well as harbour lots of dust and dirt. … The thicker the underlay, the more cushioned your floor will feel underfoot.

Does underlay level floor?

If you have an uneven sub surface, a underlay floor can potentially help level it out, but we don’t recommend this at all. An uneven surface under a floor can cause boards to sink and shift, potentially cracking or splitting them. You can’t double up on underlay. … The same goes for existing underlay products.

How thick should underlayment be?

Underlayment. Underneath the top flooring layer is often (though not always) an underlayment. It comprises padding materials and is typically about 1/4 to 1/2 inch in thickness. The purpose of the underlayment is to provide a sturdy yet comfortable layer for your outer flooring to sit on.

What is the warmest underlay for laminate flooring?

Super Gold is the best insulating laminate underlay. It is the thickest product (5mm) you can use so it also has the highest tog rating. As well as being insulating it also features a plastic vapour barrier which protects against humidity and it has a noise reduction rating of 22db.

What underlay should I use for laminate flooring on concrete?

With a concrete subfloor, you will need an underlayment that acts as a vapor barrier in order to prevent moisture from penetrating through to your laminate installation. The normal choice is a thin foam pad material made of polyethylene or polypropylene, which rolls out in sheets.

How do I prepare a concrete floor for laminate?

To get the most out of your laminate flooring, it needs to be dry, level and clean. To ensure your floor from letting in moisture, you must let the concrete cure for 30 days. It needs an excessive amount of time to fend off moisture.

How smooth does concrete need to be for laminate?

Most manufacturers recommend that the floor be flat to within 3/16” in a 10 ft. radius. These measurements are consistent with most other types of floor coverings. On floating floors, vertical movement needs to be kept to a minimum.

What thickness is laminate flooring?

Laminate flooring thickness ranges from 6mm to 12mm. The thicker the board, the more it will cost you. This doesn’t mean though that it will be of better quality.

How forgiving is laminate flooring?

While laminate tends to be more forgiving of subfloor imperfections compared to other types of flooring, it is still important to level your flooring to avoid future damage if you are installing laminate flooring on an uneven subfloor. A level subfloor ensures a more attractive and long-lasting finish.

What is the difference between AC4 and AC5 laminate flooring?

AC1-AC4 rated laminate is made using direct pressure laminate, whilst AC5 and higher is created using high pressure laminate. … This is also due to the laminate flooring thickness and its wear layer. Each AC rating increase means a 60% increase in wear.

What does AC5 mean in laminate flooring?

AC5 – Heavy Commercial More than enough for all residential applications. Plus it’ll do the business for heavy commercial applications like public buildings, department stores, and so on.

Is 4mm laminate flooring good?

In this case, the thicker the plank/tile, or sheet, the sturdier it is. The rule of thumb is to use 4mm to 6mm thickness in heavily used areas of the house and 4mm and below for areas like the bedroom.

How thick should floors be?

In a typical home, the entire structure between levels can be about 12 to 14 inches thick, depending on the type of joists used and the finish materials for the floor and ceiling.

Is Thicker better for laminate flooring?

Since a laminate floor is a floating floor, a subfloor that has a peak or valley of over 1/8th of an inch within 40 inches of grade is not good. A thicker plank can provide superior acoustics. Because the plank is thicker, sound doesn’t travel as well. A thicker plank provides better impact resistance.