Is it necessary to use underlayment for laminate flooring?

Author: Ms. Estell Gislason Sr.  |  Last update: Monday, June 23, 2025

Some laminate flooring planks come with the underlayment attached to each plank. Underlayment is not optional. If your laminate planks don't have it already attached, we recommend that you buy rolls of underlayment on which to install your laminate floor.

What happens if you don t put underlayment under laminate flooring?

Without underlayment to add a layer between these damp subfloors and the surface flooring, your laminate can quickly become wet, warped, and mildewy, harming its overall integrity. Moisture over time can also break down floor adhesive which causes the floor to start warping.

Can you lay laminate flooring without underlay?

If you don't use an underlay, your beautiful laminate flooring will be prone to damage as well as wear and tear.

What else can I use as underlayment for laminate flooring?

Polyethylene foam: Polyethylene (PE) foam is one of the most common underlayment materials for laminate flooring. PE Foam underlayments generally do not provide top-tier acoustic performance and moisture protection like an XLPP Foam underlayment, but PE Foam is often a more affordable alternative.

What flooring does not require underlayment?

Underlayment Not Required - Laminate Wood Flooring - The Home Depot.

Do I Need An Underlayment For My LVP Flooring?

How do I know if I need underlayment for laminate flooring?

Underlayment is not optional. If your laminate planks don't have it already attached, we recommend that you buy rolls of underlayment on which to install your laminate floor.

Does laminate flooring with attached padding still need underlayment?

Yes, even with attached padding, an additional underlayment can enhance moisture protection and sound insulation. While the attached padding provides minimal benefits, using a separate underlayment will improve the overall performance and longevity of your laminate flooring.

What is best to put under laminate flooring?

Foam underlay comes in rolls and is a great entry-level choice for your new floors. It's affordable and is ideal for laying over all types of subfloors. For concrete subfloors, make sure you opt for an underlay that has a vapour barrier to prevent damp from affecting your floors.

Can you put laminate directly on subfloor?

Laminate flooring is designed to be a floating floor that may be installed over virtually any type of sub floor. And by “floating”, we mean that it doesn't need to be nailed or glued to the sub floor.

Does floating floor need underlayment?

The answer will vary depending on the material used for the floor and the way that the boards are constructed, but, as a general rule, both Laminate and Engineered Timber floating floors do need some form of underlay to have optimal functionality and longevity.

Is underlayment necessary?

Even so, underlayment can only improve the overall quality of your floor—offering added stability, noise reduction, moisture protection, and comfort. So, while it might not be strictly necessary, we recommend using it if your budget allows.

Should laminate flooring underlay be foil up or down?

The underlay should be laid foil side down (essential to ensure maximum resistance to moisture from the subfloor) allowing a 5cm excess of underlay to run up the perimeter wall. Each roll of underlay should be closely butted-up.

Does underlayment have to be perfectly flat?

No subfloor is perfectly level, but any signs of unevenness and high or low spots must be remedied. Please follow these requirements: Subfloor unevenness cannot be greater than 3/16 of an inch over a 10-foot span or 1/8 inch over a 6-foot span. Subfloors must not slope more than ½ inch per 6 feet (25 mm per 1.8 m)

Do I need a moisture barrier under laminate?

No matter which underlayment you choose, if you are installing on a moisture prone subfloor or concrete subfloor, you really need a moisture barrier underlayment.

What happens if you don t use spacers when installing laminate flooring?

Many problems may occur if spacers are not used when installing laminate flooring. For example, the flooring could first compress, buckle, or warp, giving it an uneven or distorted appearance. The walls or baseboards may be harmed if the flooring pushes up against them as it expands.

Does laminate flooring need underlayment on plywood?

Wood naturally absorbs and emits moisture as the seasons and temperatures change, and blocking the exchange of moisture with the air can cause your plywood to become waterlogged, leading to mould or mildew or even buckling. With a plywood subfloor, a foam underlay is the most common choice for laminate flooring.

Where should you not put laminate flooring?

Although laminate flooring is great for use in all kinds of areas of your home, its one flaw is that it's not great when it comes to moisture. To avoid warping, discoloration, and bubbling, avoid installing laminate flooring in rooms that regularly see a lot of moisture such as bathrooms, kitchens, or utility rooms.

Can you lay laminate over vinyl without underlay?

For glue down vinyl, as long as the existing flooring is sturdy and in good condition, you can install laminate flooring on top. However, if there are any signs of peeling, gaps, or damage, it should not be used as a subfloor. An underlayment will still be needed over a glue down vinyl subfloor.

What not to use on laminate floors?

Never use a floor buffer or polisher while cleaning laminate wood flooring. Don't use abrasive or acidic cleaners. Harsh cleaners might strip the protective coating from the floor. Don't use steel wool or scouring powder.

Does it matter which side you start laminate flooring?

You will want to start in the left side of the wall you pick with the tongue on the long side of a plank facing the wall. The tongue against the wall should be removed.

Is foam underlay any good?

Enhanced comfort

One of the primary reasons homeowners opt for PU foam underlay is the unrivalled sense of comfort it provides. Its natural cushioning effect means it feels soft and plush underfoot, helping transform any room into a cosy and welcoming space.

What type of underlayment is best for laminate flooring?

What is the Best Underlayment for Laminate Floors? High-density foam is the best choice for laminate flooring. Foam protects these floors by expanding and contracting with them. To add to this, foam is long-lasting, provides a level subfloor and reduces sound transfer.

Is underlay necessary?

Typically, carpets installed without a new underlay tend to have a shorter lifespan and are more susceptible to accelerated wear. Your old underlay will not be in the best condition and therefore won't provide the support and comfort needed for your new investment.

Does underlayment need to overlap?

Felt underlayment should overlap the edge metal at the eaves and be overlapped by edge metal on the rakes. This is also true for rubberized asphalt underlayment, but not necessarily true for synthetics. Asphalt-saturated felt may fail for a number of reasons.

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