Lippage is the height difference between adjacent tiles. Homeowners often assume it’s a bad tile batch, but in reality, it’s usually caused by subfloor flatness violations. At JN Tile, we frequently diagnose lippage complaints in La Porte kitchens where the tile itself is perfectly within spec.
The ANSI Flatness Standards Most Floors Fail
ANSI A108 standards require:
No more than 1/4" variation in 10 feet
No more than 1/16" variation in 2 feet
For large-format tile (any tile with one side ≥15"):
1/8" in 10 feet
1/16" in 2 feet
Most builder-grade slabs in La Porte fail these tolerances straight from the pour.
Why Texas Slabs Make Flatness Worse Over Time
La Porte homes sit on expansive clay soils that:
Expand when wet
Shrink during drought
Move seasonally
This slab movement creates:
Micro-curling
Settlement dips
High ridges near load-bearing walls
Installing tile without correcting these deviations guarantees visible lippage—especially under kitchen lighting.
Large-Format Tile Magnifies Every Defect
The larger the tile, the less forgiving the installation.
Large-format tile:
Bridges high and low spots
Cannot conform to substrate irregularities
Amplifies even minor flatness errors
Using leveling clips does not fix flatness—they only align tile edges temporarily.
Why Skipping Floor Prep Is the Root Cause
Common prep shortcuts that cause lippage:
No mechanical grinding of high spots
Skipping self-leveling underlayment
Feathering thinset instead of flattening the slab
Installing directly over old tile or coatings
At JN Tile, flatness correction happens before layout begins—not during installation.
Lippage Is More Than Cosmetic
Excessive lippage:
Creates trip hazards
Causes uneven load distribution
Leads to edge chipping and tile cracking
Violates ANSI installation standards
In kitchens, where rolling appliances and heavy islands are common, these risks compound quickly.
How Professionals Prevent Lippage Before Tile Is Set
Correct process includes:
Laser-level slab mapping
Grinding and filling to ANSI tolerances
Tile layout planning to avoid high-risk transitions
Mortar selection matched to tile size and substrate
Skipping any of these steps shifts the problem onto the finished surface.
Flat Floors Aren’t Optional
If you’re seeing lippage in your La Porte kitchen, it’s not bad luck—it’s bad prep. JN Tile specializes in technically correct floor preparation that protects your investment long-term.
Contact us today. We proudly serve La porte, TX, Deer park, TX, Pasadena, TX, Seabrook, TX, and Houston, TX.
