- Concrete Overlays Home
- Get the Look - Interior Overlay Pictures
- When to Use a Polymer Overlay
- Comparison Chart of Overlay Systems: Which is best for your project?
- Five Factors to Consider when Choosing a Resurfacing System
- Concrete Overlay Reviews
- Types of Overlays
- Epoxy Coatings
- Microtoppings & Skim Coats
- Self-Leveling Overlays
- Spray-Down Toppings
- Polishable Overlays
- Stamped Concrete Overlays
- Preparing Concrete for Resurfacing
- Concrete Resurfacing
- Reducing Bond Failures Caused by Moisture-Vapor Transmission
- Don't Let Water Vapor Delaminate Your Overlay: How to seal concrete before an overlay
- How-To Tips for Installing Concrete Overlays
- Answers to Common Questions About Concrete Overlays: Advice from expert Chris Sullivan
- How to Add Color to Concrete Overlays
- How to Protect and Maintain Resurfaced Concrete
- Overlay Tools: Seven essential tools for concrete resurfacing
- Related Information
- Concrete Overlay Videos, with Bob Harris
- Decorative Concrete Overlays: A primer of the various overlay types and the decorative possibilities with each
- Vertical Concrete Overlays: Lightweight cement-based overlays mimic stone, brick, and other wall textures
Placing Overlays over Tile Floors
What is the best self-leveling concrete overlay to apply over ceramic or clay tiles? Do the tiles need to be treated before applying the overlay?
This will depend on the type of tiles you are going over. Glazed tiles usually require a light sanding to "rough up" the surface. The glaze can often act as bond breaker and is a difficult surface for anything to adhere to. Porous unglazed clay or stone tiles, on the other hand, require no additional preparation.
The other factor to consider is the depth or thickness of the overlay. If you go too thin, the grout lines in the tile floor can ghost through the material. This won't matter if another hard flooring surface will be going over the self leveler, but the ghosting can ruin the appearance of the floor if the self leveler is going to be stained or sealed. If you will be applying the self leveler at thickness less than 1 inch, consider using a crack-suppression membrane or fiber fabric to help eliminate the possibility of ghosting. If the grout lines are deep, use a repair mortar to fill the grout lines and create a level surface.
Author Chris Sullivan, ConcreteNetwork.com technical expert and vice president of sales and marketing for ChemSystems Inc.
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