Why a Flat Subfloor is Essential for Click-Lock LVP Flooring

Luxury Vinyl Plank (LVP) flooring has become a popular choice for homeowners and businesses due to its durability, affordability, and realistic wood-like appearance. Among the different installation methods, click-lock LVP flooring stands out for its ease of installation, requiring no glue or nails. However, one critical factor often overlooked is subfloor flatness. If the subfloor isn’t level, it can cause a host of issues that impact the longevity and performance of your flooring.

The Importance of a Flat Subfloor

A properly prepared subfloor ensures that your click-lock LVP flooring installs smoothly and lasts for years. Here’s why subfloor flatness is crucial:

1. Prevents Gaps and Separation

Click-lock LVP flooring relies on a tight interlocking system. If the subfloor is uneven, the planks may not lock properly, leading to visible gaps between boards. Over time, this can worsen as foot traffic causes movement.

2. Reduces Risk of Plank Damage

When installed over an uneven surface, planks can flex excessively, putting stress on the locking mechanism. This can cause the edges or joints to break, leading to chipped or separated planks.

3. Prevents a Hollow or Bouncy Feel

Uneven subfloors create areas where the LVP planks don’t sit flush against the surface, causing a bouncy or hollow feel when walked on. This not only affects comfort but can also lead to long-term wear and tear.

4. Enhances Aesthetic Appeal

A flat subfloor ensures a smooth and seamless finish, preventing dips, ridges, or uneven transitions that can make your floor look unprofessional.

5. Maintains Manufacturer Warranty

Most LVP flooring manufacturers specify a maximum allowable subfloor variation, typically no more than 3/16 inch over 10 feet. If your subfloor exceeds this limit and damage occurs, it could void the product warranty.

How to Check and Fix an Uneven Subfloor

Before installing click-lock LVP flooring, it’s crucial to assess and correct subfloor imperfections.

Step 1: Check for Unevenness

Use a long level, straightedge, or laser level to check for dips and high spots. Mark any areas that need attention.

Step 2: Correct High and Low Spots

• For High Spots: Sand down or grind raised areas in wood or concrete subfloors.
• For Low Spots: Use a self-leveling compound for concrete or an underlayment patch for wood to fill dips.

Step 3: Install an Underlayment (if needed)

Some LVP products require an underlayment for additional moisture protection and minor subfloor correction. Always follow manufacturer recommendations.

Conclusion

A flat subfloor is non-negotiable when installing click-lock LVP flooring. Proper preparation ensures a flawless appearance, prevents damage, and keeps your floor performing well for years. Taking the time to level your subfloor before installation can save you from costly repairs and frustration down the road.

Do you need help with flooring installation or have questions about subfloor preparation? Let us know in the comments!