Do floating floors need underlayment?

Author: Enrico Hand  |  Last update: Thursday, June 19, 2025

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.

What flooring does not require underlayment?

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

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.

What do you put under floating floor boards?

Floating floor underlay is a layer of foam or rubber that protects your floors.

Should you put underlayment under vinyl plank flooring?

When you have a bump or dip in your subfloor, the uneven surface can cause vinyl planks click-lock-systems to become uneven. This will cause creaking or “popping” every time you walk over the floor. An underlayment can help fill in subfloor imperfections and leave your flooring a smooth surface to lay on.

Why You Need Underlayment For Your Floors

Can you put vinyl plank flooring directly on the subfloor?

If the vinyl flooring product you choose doesn't have an attached underlayment, you can almost always install directly over the subfloor without one.

What is the best underlay for vinyl plank flooring?

Rigid Vinyl Plank Flooring

SPC Floors: These rigid floors often work best with softer underlayments made of foam, felt, or cork. These materials provide cushioning and help absorb sound, enhancing the floor's performance.

Do you need underlayment for a floating floor?

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.

What are the disadvantages of floating floors?

- Durability: floating flooring is not as durable a solution as glue-down flooring; - Noisier inside the house: the way it is installed means that there is space between each layer, and because of this this this type of floor can cause more noise when you walk around inside the house.

What holds a floating floor in place?

How does a floating floor stay in place? Floating floors connect at the seams using a tongue and groove or interlocking system. Once installed, the weight of the floating floor keeps the floor in place for years.

How thick should underlay be for floating floors?

Laminate flooring underlay is the standard 3 mm of thickness. Carpet is about 11-12 mm. Vinyl doesn't need flooring underlay if it's glued down, but if it's floating, it needs one that is 1 mm to 1.5 mm thick.

Do you really need underlayment?

In most cases, underlayment offers multiple benefits such as added comfort, sound reduction, and moisture protection. While some flooring types like tile or engineered hardwood might not always require it, underlayment is often a good investment to ensure the best performance and longevity of your floors.

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.

Can you install laminate flooring without underlayment?

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

Does the Stainmaster LVP need underlayment?

All Stainmaster luxury vinyl needs underlayment, which isn't a big deal: most floors do. That said, Stainmaster is super picky about the kind of underlayment you use.

What is the best backing for vinyl plank flooring?

Choosing a vinyl flooring with rubber backing is ideal. Rubber features several properties that make it a quality choice for a long-lasting floor. Rubber is a strong option that can withstand heavy loads. It also offers valuable shock absorption that can help to make your floor more comfortable to walk on.

What is the lifespan of a floating floor?

On average, laminate flooring can last 15 to 25 years with proper care and maintenance. However, some higher-quality laminate floors can last even longer, potentially up to 30 years.

What does a floating floor sit on?

A floating floor is a type of flooring installation system where the flooring is not secured to the subfloor by means of glue, nails, or staples. It actually lays on top of the subfloor and each panel or plank is secured to each other by a locking system or adhesive and simply "floats" on top of the subfloor.

Is it normal for a floating floor to bounce?

A floating floor can have a slight bounce or give underfoot, but it should not feel excessively bouncy or unstable.

What flooring does not need underlay?

Vinyl – the only flooring that doesn't require underlay
  • It has a cushioned base layer. Long gone are the days of cheap, thin lino rolls that provide zero support or protection. ...
  • It's inherently durable. ...
  • It's designed for direct installation.

How do you prepare a subfloor for a floating floor?

Your subfloor must be:
  1. Level within 3/16 inch for every 10 feet. Grout lines must be filled in if using tile as a subfloor. ...
  2. Flat.
  3. Cleaned. All dust and debris should be swept.
  4. Structurally sound. Clear of any nails, loose screws that squeak or are damaged, or any parts that were damaged by moisture.
  5. Dry.

Should you put underlayment under LVP?

If you're laying the LVP over an existing cushion-backed vinyl floor or a below-grade tile floor, you won't need to use an underlayment. However, you'll want to use one in every other application, including covering existing hardwood floors, uncushioned vinyl flooring, and concrete floors.

What vinyl flooring does not require underlayment?

Underlayment is not required if the vinyl flooring will be laid over a cushion-backed vinyl floor or a tile floor below grade. In all other applications, however, you should use one, such as covering existing hardwood floors, vinyl flooring without cushion, and concrete floors.

What happens if you don't put a moisture barrier under vinyl flooring?

When moisture penetrates your flooring, it can cause mold, mildew, and the potential for water damage. A moisture barrier helps control the water vapor's movement to help protect your floors. Therefore, if you're installing floors in an area that sees moisture, even a little, a vapor barrier is needed.

What to do when water gets under vinyl plank flooring?

If water has seeped under the flooring, it's crucial to dry out the subfloor completely before reinstalling the vinyl. Use fans, dehumidifiers, or professional drying equipment to ensure all moisture is removed.

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