Sometimes yes. Sometimes adding extra underlayment is exactly what you should NOT do.
If you are choosing LVP flooring in Denver, underlayment can help with comfort, sound, and installation — but only when the flooring system actually calls for it.
At Dream Flooring LLC — (303) 330-0575, we do not treat underlayment as a universal upgrade.
The correct answer depends on the product, the subfloor, and the manufacturer requirements.
1. Some LVP Already Has Attached Pad
Many modern LVP products come with an attached backing.
In that case, adding another layer underneath may be unnecessary.
Worse, it can sometimes create too much movement.
That extra softness can put stress on:
- Locking joints
- Seams
- Plank edges
- High-traffic areas
More cushion does not automatically mean better flooring.
2. Underlayment Does Not Fix an Uneven Subfloor
This is one of the biggest myths.
If the floor underneath has:
- Low spots
- High spots
- Dips
- Raised seams
- Loose plywood
underlayment will not solve the problem.
The subfloor itself may need:
- Patching
- Grinding
- Repair
- Smoothing
- Leveling preparation
At Dream Flooring LLC — (303) 330-0575, we always separate subfloor preparation from underlayment.
They are not the same thing.
3. Underlayment Can Help With Sound
In some installations, underlayment can reduce the hollow or clicking sound of a floating floor.
That can be useful in:
- Bedrooms
- Upstairs rooms
- Condos
- Multi-level homes
But the benefit depends on the specific product and installation system.
Do not assume every extra pad creates better sound control.
4. Concrete Can Change the Answer
For LVP over concrete, moisture considerations become especially important.
The installation may require:
- A specific underlayment
- A vapor-control layer
- An approved attached pad
- Another manufacturer-specified system
The correct setup depends on the actual product.
That is why the flooring instructions matter more than a generic rule from the internet.
5. Underlayment Can Affect the Locking System
Floating LVP relies on the locking joints staying properly supported.
If the material underneath is too soft, the floor can flex more underfoot.
Over time, that can contribute to:
- Clicking
- Movement
- Separation
- Joint damage
This is why adding a second pad under a product with attached backing can be a bad idea unless it is specifically allowed.
6. What About Comfort?
Yes, underlayment can sometimes make a floor feel slightly softer or quieter.
But LVP is not supposed to feel like carpet.
If the floor feels excessively soft or bouncy, that may actually be a warning sign.
A good LVP installation should feel stable.
7. What About Cold Basement Floors?
In Denver basements, homeowners sometimes want underlayment because concrete feels cold.
Certain systems can help slightly with comfort.
But underlayment should not be treated like full insulation.
And it definitely should not be used to hide moisture problems in the slab.
8. Can You Use Underlayment Over Existing Flooring?
Sometimes.
But first, the existing floor has to be suitable.
It should generally be:
- Stable
- Flat
- Dry
- Secure
If the old flooring is loose, uneven, or damaged, adding underlayment on top does not make it a good base.
9. More Layers Can Create Height Problems
Extra underlayment changes floor height.
That can affect:
- Doors
- Appliances
- Transitions
- Baseboards
- Stairs
It may only be a few millimeters, but those millimeters can matter at a doorway or transition.
10. So When Do You Actually Need It?
You may need underlayment when:
- The product requires it
- The product does not have attached pad
- Sound control is part of the installation plan
- The concrete system calls for a specific layer
- The manufacturer approves the combination
You may NOT need it when:
- The LVP already has attached backing
- The manufacturer prohibits additional pad
- You are trying to use it to fix an uneven floor
- It creates too much softness
The Best Question to Ask
Do not ask:
“Should we add underlayment?”
Ask:
“What does this exact LVP product require over my exact subfloor?”
That is the question that matters.
At Dream Flooring LLC — (303) 330-0575, we provide LVP installation, vinyl flooring, hardwood, engineered hardwood, laminate, repairs, stairs, and subfloor preparation throughout Denver Metro.
If you are choosing LVP flooring in Denver, call Dream Flooring LLC at (303) 330-0575.
Underlayment can improve the right flooring system. The wrong underlayment can create the problem you were trying to prevent.
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