Can you install glue down vinyl over tiles?
One question we get asked a lot is whether you can install glue down vinyl over tiles — whether porcelain tiles, slate tiles, or baked terracotta tiles.
The short answer is: in most cases, yes. But some tile types are easier than others, and there are important checks and balances to complete before you proceed.
Step 1: Check the Integrity of the Tiles
If tiles are not properly bonded into the substrate, they may sound hollow when tapped. This is a big red flag. Any tiles that are loose, cracked, water-damaged, or covered in residue will need to be removed before installation can continue.
Step 2: Eliminate Surface Contamination
Tiles must be free of contaminants such as dirt, waxes, oils, or sealants. These can usually be removed with a strong tile cleaner or diluted acid solution. In tougher cases, grinding may be required.
Terracotta tiles can be especially challenging, as many are sealed with linseed oil. These need to be ground back to the raw core before primers can be applied.
Step 3: Know Which Tiles Are Unsuitable
While porcelain and baked tiles are usually workable, slate tiles are a no-go. Slate has a layered natural structure, and those layers can unpredictably release over time. For this reason, slate tiles must always be removed before installing glue down vinyl.
Step 4: Apply a Slurry and Screed
Once tiles are clean and sound, a slurry primer is applied. Commonly used options include:
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ITE Slurry – a fast-drying, paint-on system ideal when followed by ITE screed.
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Tal Slurry – used with Tal self-levelling screeds for a reliable finish.
Self-levelling screed is essential over tiles. It evens out grout lines, fills dips, and eliminates lippage (height differences between tiles). Without it, grout lines can eventually echo through the vinyl.
Step 5: Surface Preparation for Best Adhesion
If tiles are shiny, sanding the surface lightly before applying slurry gives a better surface profile. This helps the slurry and screed mechanically lock into the surface, strengthening the overall system.
Step 6: Proceed with Installation
After preparation, the standard glue down system can be followed:
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Self-levelling screed
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Adhesive
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Vinyl installation
Keep in mind that screed over tiles tends to dry more slowly since moisture escapes only through the top surface. Plan your timeline accordingly.
A Word of Caution
In the South African market, many tiled floors are poorly installed. Even if only one or two tiles appear cracked, a reverb stick test often reveals widespread looseness due to expansion and contraction. In these cases, it’s best to remove all tiles. While this adds a day of work, it ensures your vinyl floor lasts for many years.
Final Thoughts
Installing glue down vinyl over tiles can save time and effort if the existing tiles are structurally sound and properly prepared. However, if there are concerns about loose or hollow tiles, removal is the safer long-term choice.
All the products you need — self-levelling compounds, adhesives, and vinyl flooring — are available on the Floor Mechanics website. If you’d like guidance before purchasing, our team is available via WhatsApp, email, or phone to help you make the right choice.
