Renovating with ceramic or porcelain tiles can completely transform a space—but when tiles are laid incorrectly, the result can be far from the stylish finish you imagined. With the Irish tiling market growing and evolving, investing in quality workmanship and correct installation is more important than ever.
In this guide we look at the 5 most common tiling mistakes, how to spot issues early, and what you can do (whether you’re DIYing or working with a pro) to ensure a durable and stylish finish.
The foundation of any successful tiling job is the correct substrate. Unfortunately, one of the most frequent mis‑steps is inadequate preparation, which can lead to cracking, lifting or uneven tiles.
Ensure the surface is clean, dry, level and free of grease or dust.
If you're tiling over existing tiles, you must roughen the surface to ensure proper adhesion.
Especially in Ireland’s variable climate, moisture control and surface stability are critical.
The thickness and application of the adhesive layer is another area where things often go wrong. In particular:
For floor tiles, adhesive thickness should typically be around 3–5 mm, depending on tile size and substrate.
Too thin a layer = poor adhesion. Too thick = risk of bulging or uneven tiles.
Also consider the curing time of the adhesive before foot traffic is allowed—rushing this will compromise the result.
Even when materials are top quality, a poor layout can spoil the final look. In Ireland’s market, large‑format tiles are increasingly popular for their modern aesthetic. But they also demand more planning.
Lay tiles out dry before fixing to visualise the pattern and cuts.
Avoid tiny off‑cuts at edges—strive for symmetry and balanced end pieces.
For large format tiles, plan seams and transitions carefully—these formats show irregularities much more evidently.
If you’re hiring professionals rather than doing it yourself, look out for these signals:
They skip the spirit level or don’t use spacers/tiles crosses → bad sign for precision.
Tiles are stored poorly (uneven, damp, or stacked badly) before installation.
If you’re taking on the job yourself, you can still achieve a professional‑looking result, provided you respect the process:
Start by marking central lines and aligning from the centre of the space outward.
Ensure the adhesive layer is applied uniformly, and use a notched trowel for consistent thickness.
Use the right tools: tile cutter or wet saw, laser level, spacers, rubber mallet, etc.
For wood‑look tiles or designs with directionality, accuracy in cutting and aligning is vital.
Big format tiles (e.g., 60×120 cm) bring a clean look, but they need perfect substrate and installation method (such as “double buttering” of adhesive).
Whether you’re renovating a home in Cork, fitting out a hotel lobby in Dublin or upgrading an office space in Galway, the difference between amateur and professional tiling is clear. By focusing on surface prep, adhesive thickness, layout planning, the right tools—and the right installer—you’ll be rewarded with a surface that looks exceptional and lasts.
At Deco Stones, we’re committed to helping our Irish clients achieve this standard. From premium tile ranges to advice on installation, we’ve got you covered.
