Professional tiling on the Costa Blanca

Why pro tiling lasts four times longer

Bad tiling shows within months. Tiles that sound hollow when tapped, cracked or blackened joints, corners losing alignment. Properly done tiling lasts 30-40 years without significant issues. The difference comes down to four factors the average client doesn’t see but that determine real durability: substrate prep, adhesive choice, laying technique and final grouting. Each has a multiplier effect, so a failure in any one compromises the whole.

Substrate prep is the most-skipped in rushed work. Before adhesive and tile, you have to verify the substrate is flat (we check with an aluminium straightedge for deviations up to 3mm over 2 metres), clean (no dust or grease) and balanced absorption (neither too dry nor too wet). If the substrate has bigger deviations, it must be levelled with self-levelling mortar before starting.

Adhesives: the detail that separates durable from disaster

C1 cement adhesive is the cheapest, sold in 25kg bags at any hardware store. Fine for basic ceramic on dry interior walls. For floors, bathrooms, exterior or any modern porcelain stoneware with low absorption, you must use at least C2, ideally C2TES1 (cementitious, improved, extended open time, reduced slip). Cost difference between C1 and C2TES1 is relatively small, but durability and detachment-resistance gain is huge.

For large format (tiles over 60x60cm), what’s being laid in modern construction, use a specific large-format adhesive and apply double back-buttering (trowel on substrate and on tile). Without double back-buttering, large tiles risk internal voids that over time cause point-pressure breakage.

Levellers and perfect joints

The leveller systems with plastic wedges seen on professional jobs aren’t aesthetic flair. They guarantee adjacent tiles end up at the exact same height, no perceptible step when running a finger across. Without levellers, especially on floors, small height differences appear that ruin the look.

Modern joints are 1.5-2mm with crosshairs in large format and 2-3mm in classic formats. Small joints give a continuous minimalist look but require more laying precision. Grouting is done with epoxy in heavy-humidity zones (shower, kitchen worktop) and standard flexible cementitious grout elsewhere. Epoxy is stain and mould resistant but more demanding to apply and usually pricier.

Special work

Thin porcelain panels (Dekton-type) at 4mm in large format are the new trend for premium worktops and cladding. Laying needs specific tools (large carrying suction cups, big-capacity wet saw) and refined technique. You can’t improvise with thin porcelain, bad handling and the panel breaks beyond repair.

For mosaics, especially small glass or natural stone, use a transparent white adhesive so it doesn’t show through joints. Grout with quality grout because mould on small mosaics is visually unpleasant and hard to clean later.