When removing old bathroom tiles in Spain, it is very common to discover that the tiles were not installed with a full, even adhesive layer.
Instead, we often find large adhesive “blobs” or patches applied to the back of each tile.

For many Northern European professionals, this looks unusual. In Scandinavia and the Baltic region, tiling is typically done with full-surface adhesive coverage on a properly levelled substrate.

So why is it different here?

Let’s look at both systems objectively.

Traditional Spanish “Dot-and-Dab” Tile Installation

In many Spanish homes built between the 1980s and early 2000s, tiles were installed using a spot-bonding method:

• Adhesive or mortar was applied in patches on the back of the tile.

• The tile was pressed directly against brick or uneven masonry.

• The wall underneath was often not fully levelled beforehand.

Why Was This Method Used?

There are several practical reasons:

1. Construction Speed During Building Boom

Spain experienced massive construction growth. Developers needed fast turnaround. Spot bonding allowed quicker installation.

2. Lower Material Use

Less adhesive is required compared to full coverage.

3. Uneven Brick Surfaces

Many Spanish interior walls are hollow clay block. Instead of fully plastering and levelling walls, installers compensated using thicker adhesive spots.

4. Dry Climate Assumptions

Historically, Spain’s drier climate reduced concern about trapped moisture compared to Northern Europe.

5. Cost-Oriented Construction Culture

Many developments were built to sell quickly, not necessarily to last decades under high moisture stress.

This method is not “wrong.”
It was practical for its time and context.

However, building standards evolve.

Limitations of the Spot-Bonding Method

While it can function adequately, it has structural and durability weaknesses:

• Air cavities remain behind tiles.

• Reduced adhesive contact area.

• Higher risk of tile detachment over time.

• Moisture can accumulate in voids.

• Not suitable for large-format tiles.

• Less resistance to vibration and structural movement.

In wet zones (showers especially), incomplete coverage increases risk if waterproofing is inadequate.

Modern European standards generally require 80–100% adhesive coverage in wet areas.

🇫🇮🇪🇪 Northern European Full-Coverage Method

In Northern Europe, tile installation typically follows this process:

• Wall is levelled with plaster or cement board.

• Waterproof membrane is applied in wet areas.

• Adhesive is combed with a notched trowel across the entire surface.

• Tile is pressed to achieve near 100% coverage.

Why This Method Is Technically Superior

1. Maximum Adhesion

Full contact ensures stronger bond and load distribution.

2. No Air Voids

Eliminates moisture pockets behind tiles.

3. Better for Large Format Tiles

Modern design increasingly uses larger tiles. Spot bonding is unsuitable for them.

4. Improved Moisture Management

Combined with proper waterproofing systems, this dramatically reduces risk of hidden water damage.

5. Long-Term Durability

Less risk of hollow sounds, cracking, or detachment.

Climate Is Not an Excuse Anymore

Some argue that Spain’s climate justifies lighter methods.
But modern bathrooms generate:

• Steam

• Condensation

• Daily water exposure

Building science does not change with geography.

Today’s renovation standards across Europe favour full-surface adhesion and proper waterproofing — regardless of country.

So Which Method Should Be Used Today?

For modern renovations, especially in investment properties, holiday rentals, or long-term homes:

Full adhesive coverage + proper waterproofing
is the safer and more durable solution.

It increases longevity, reduces callbacks, and protects property value.

Our Approach at Limpax

When we renovate bathrooms, we follow modern European standards:

• Substrate preparation

• Levelling if necessary

• Waterproof membrane in wet zones

• Full adhesive coverage

• Correct tile selection for the environment

Because durability is not optional — especially in rental and investment properties.

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You’re building authority now.
Let’s do it properly.