What Every DIYer and Installer Needs to Know Before Laying That First Plank

Contributor: Stuart Perque

Luxury Vinyl Plank (LVP) flooring has become one of the most popular flooring choices for homeowners—and for good reason. It’s durable, waterproof, affordable, and comes in stunning designs that mimic real hardwood. But here’s the catch: even the best LVP can fail if it’s not installed correctly.

At Renovation Flooring, we’ve seen it all. Homeowners who invested thousands of dollars in beautiful flooring, only to watch it buckle, warp, or separate within months—all because of installation mistakes that could have been avoided.

Whether you’re a DIY enthusiast ready to tackle your first flooring project or an installer looking to sharpen your skills, this guide will walk you through the do’s and don’ts of proper LVP installation.

Why Proper Installation Matters

LVP is marketed as an “easy” flooring option, and while it’s certainly more forgiving than hardwood, that doesn’t mean you can cut corners. Improper installation can lead to:

  • Buckling and warping from temperature changes
  • Peaking where planks push against each other
  • Gapping between planks
  • Moisture damage from below
  • Premature wear and tear
  • Voided manufacturer warranties

The worst part? Many of these issues don’t show up immediately. You might think your installation was a success, only to discover problems 6-12 months later.

Preparing Your Subfloor: The Foundation of Success

Before a single plank goes down, your subfloor needs to be clean, dry, flat, and stable. This step is non-negotiable.

For Plywood Subfloors

Common Mistake: Installing LVP directly on plywood without proper preparation.

What to Do:

  • Check that plywood is securely fastened (no squeaks or movement)
  • Sand down any high spots or seams
  • Fill any holes, gaps, or cracks with appropriate filler
  • Ensure the subfloor is level (no more than 3/16″ variation over 10 feet)
  • Clean thoroughly—remove all dust, debris, and old adhesive
  • Check moisture levels with a moisture meter (should be below 12%)

Do You Need Underlayment on Plywood?

This depends on your specific LVP product. Some LVP comes with attached underlayment, while others require a separate underlayment layer. Always check the manufacturer’s recommendations. Underlayment can provide:

  • Sound dampening
  • Minor subfloor imperfection correction
  • Added comfort underfoot
  • Thermal insulation

⚠️ Pro Tip: Never layer underlayment over underlayment. If your LVP has attached padding, do NOT add additional underlayment—this can cause the floor to feel “spongy” and may void your warranty.

For Concrete Subfloors

Common Mistake: Skipping the moisture barrier on concrete.

This is one of the most frequent—and costly—mistakes we see. Concrete is porous and holds moisture, even if it appears dry to the touch. That moisture will eventually work its way up and cause your LVP to fail.

What to Do:

  • Always perform a moisture test before installation (calcium chloride test or relative humidity test)
  • Always install a moisture barrier (6-mil polyethylene sheeting or a specialized vapor barrier underlayment)
  • Ensure new concrete has cured for at least 60-90 days
  • Fill any cracks or low spots with self-leveling compound
  • Verify the concrete is level (same 3/16″ over 10 feet rule applies)

Signs of Moisture Problems:

  • White, chalky residue on concrete (efflorescence)
  • Damp spots
  • Musty odors
  • Previous flooring adhesive failure

⚠️ Warning: Moisture issues don’t just damage your flooring—they can lead to mold and mildew growth beneath the floor, creating health hazards for your family.

Acclimation: Don’t Skip This Step!

Before installation, your LVP needs to acclimate to your home’s environment.

What to Do:

  • Bring the flooring into the room where it will be installed
  • Let it sit for at least 48 hours (some manufacturers require longer)
  • Maintain normal room temperature (65-85°F) and humidity levels
  • Keep boxes flat and slightly open for air circulation

Why It Matters:

LVP expands and contracts with temperature changes. If you install it straight from a cold warehouse or hot delivery truck, it will shift as it adjusts to your home’s climate—leading to gaps, buckling, or peaking.

The Installation Process: Step by Step

  1. Plan Your Layout
  • Measure the room and calculate the width of the last row
  • If the last row will be less than half a plank wide, adjust your starting row
  • Decide on your installation direction (typically parallel to the longest wall or main light source)
  • Stagger end joints by at least 6 inches (some manufacturers require more)
  1. Leave Expansion Gaps

This is critical! LVP needs room to expand and contract.

  • Leave ¼ to ½ inch gap around all walls and fixed objects
  • This includes around door frames, cabinets, islands, pipes, and transitions
  • These gaps will be covered by baseboards and trim

Common Mistake: Installing too tightly against walls or pinching the flooring under door frames.

  1. Proper Plank Connection
  • Follow the manufacturer’s instructions for your specific locking system
  • Angle-and-drop systems and fold-down systems have different techniques
  • Use a tapping block (never hammer directly on the plank)
  • Ensure each row is fully engaged before moving to the next
  1. Work Clean
  • Vacuum as you go to prevent debris from interfering with connections
  • Check planks for defects before installing
  • Keep your work area organized

Karndean Luxury Vinyl floor for custom home in Seacrest FL

What NOT to Do: Common Installation Mistakes

❌ Don’t Install Over Existing Flooring (Unless Approved)

While some LVP can go over existing hard floors, you should:

  • Never install over carpet or padding
  • Check manufacturer guidelines
  • Ensure the existing floor is in good condition
  • Account for added height at transitions and doorways

❌ Don’t Use the Wrong Adhesive

If you’re installing glue-down LVP:

  • Use only the adhesive recommended by the manufacturer
  • Follow open time and working time instructions exactly
  • Never use leftover adhesive from other flooring types

❌ Don’t Forget Transitions

Proper transitions are essential at:

  • Doorways and room changes
  • Changes in flooring type
  • Areas over 40 feet in any direction (expansion breaks)
  • Changes in subfloor type

❌ Don’t Install in Extreme Temperatures

  • Never install in unheated or un-air-conditioned spaces
  • Sunrooms, garages, and enclosed porches may not be suitable
  • Direct sunlight during installation can cause immediate expansion

❌ Don’t Secure the Floor to the Subfloor

Unless using glue-down LVP, floating floors must float freely:

  • No nails or screws through the planks
  • No adhesive to the subfloor
  • No pinching under heavy objects or cabinets

Special Considerations

Radiant Heat

Many LVP products are compatible with radiant heating, but:

  • Maximum floor temperature is typically 85°F
  • Turn off the heat 24-48 hours before installation
  • Gradually increase temperature after installation
  • Always verify with the manufacturer

Bathrooms and Kitchens

LVP is waterproof on the surface, but:

  • Water can seep through seams and expansion gaps
  • Use silicone caulk around tubs, toilets, and showers
  • Clean up standing water promptly
  • Consider the moisture barrier beneath, especially on concrete

Heavy Furniture and Appliances

  • Use furniture pads under legs
  • Use plywood sheets to roll heavy appliances
  • Don’t drag furniture across the floor
  • Refrigerators and stoves should have protection under their feet

Signs Your LVP Was Installed Incorrectly

If you’re experiencing any of these issues, installation errors may be to blame:

✅ Planks separating or gaps forming between boards
✅ Edges lifting or “tenting”
✅ Buckling in the middle of the room
✅ Clicking or popping sounds when walking
✅ Planks that feel loose or bouncy
✅ Visible peaking at transitions or walls
✅ Moisture or discoloration beneath the flooring

When to Call the Professionals

DIY flooring installation can be rewarding, but it’s not for everyone or every situation. Consider professional installation if:

  • Your subfloor has significant damage or leveling issues
  • You have concrete without a moisture barrier
  • You’re dealing with complex room layouts
  • You’re unsure about proper techniques
  • You want your warranty fully protected

Let Renovation Flooring Help

Installing LVP correctly the first time saves you money, frustration, and the headache of having to redo the job. We’ve helped countless homeowners who came to us after a failed DIY attempt or a botched contractor job—and we’d much rather help you get it right from the start.

Whether you’re looking for:

  • Professional LVP installation you can trust
  • Expert advice on subfloor preparation
  • Help choosing the right flooring for your space
  • Answers to your installation questions

We’re here for you.

Ready to Get Started? Let’s Talk!

Don’t leave your flooring investment to chance. If you’re unsure about any part of the installation process, or if you’d simply prefer to have experienced professionals handle the job, we’re just a phone call away.

📞 Call Renovation Flooring today or contact us online for a free consultation. Our team is happy to answer your questions, assess your space, and ensure your new floors are installed correctly—so they look beautiful and last for years to come.

Your floors deserve the best. So do you.