Underfloor Heating in New Builds in Spain: What Works and What Doesn’t?

Vloerverwarming in nieuwbouw Spanje: wat werkt wel en niet?

Underfloor heating is becoming increasingly popular in new-build homes in Spain. It offers comfort, even heat distribution, and a clean, modern look.

However, there are still many questions about how underfloor heating works with different types of flooring.

What works well? What doesn’t? And what should you pay attention to in a new-build property on the Costa Blanca?

In this article, we explain it clearly.

What types of underfloor heating are there?

In Spain, we mainly see two systems:

1. Water-based underfloor heating

This system uses pipes with warm water installed in the floor.

Advantages:

  • energy-efficient when used correctly
  • even heat distribution
  • suitable for entire homes

2. Electric underfloor heating

This system works with electric cables or heating mats.

Advantages:

  • fast heating
  • ideal for bathrooms
  • easier to install

For full homes, water-based systems are usually the preferred choice.

Which flooring works best with underfloor heating?

Not every floor works equally well with underfloor heating.

Good choices:

PVC (dryback) / LVT

  • excellent heat conductivity
  • comfortable underfoot
  • stable with temperature changes

Tiles

  • conduct heat very well
  • but feel harder and colder without heating

Less suitable:

Solid wood

  • can expand and shrink
  • sensitive to temperature changes

Thick carpets

  • insulate heat
  • reduce efficiency

Underfloor heating in new builds: where does it often go wrong?

In practice, we often see the same mistakes:

  • flooring is chosen without considering the heating system
  • underfloor heating is started too quickly
  • no attention to build-up and drying times
  • incorrect adhesives or materials used

This can lead to:

  • cracks
  • loose flooring
  • poor heat distribution

The start-up protocol: crucial but often ignored

After installation, underfloor heating must be started up gradually.

This means:

  • slowly increasing the temperature
  • allowing proper drying time for the subfloor
  • preventing tension in the floor

This step is often underestimated, but it is essential for a long-lasting result.

Levelling and underfloor heating

In new builds, people often assume the subfloor is ready to use.

In reality, levelling is often necessary, especially for PVC floors.

A smooth subfloor ensures:

  • better heat distribution
  • a cleaner final result
  • fewer risks of problems

Also read our article about:
👉 levelling in a new-build home in Spain

for more information.

When should you plan underfloor heating and flooring?

Timing is everything.

A proper sequence is:

  1. installation of underfloor heating
  2. drying and start-up
  3. levelling (if needed)
  4. installation of the floor

Working too fast = problems later.

Underfloor heating in new builds on the Costa Blanca

On the Costa Blanca, we see a clear trend:

More and more new-build homes are equipped with underfloor heating, often combined with PVC flooring.

This combination offers:

  • comfort
  • energy efficiency
  • a modern look

Advice on underfloor heating and flooring

Not sure which floor works best with underfloor heating in your home?

In our showroom in Altea, we are happy to advise you on the right combination of heating and flooring.

We guide you through the entire process: from selection to installation.

Port of Altea operates across the Costa Blanca, including:

Altea, Albir, Benidorm, Calpe, Moraira, Jávea, Denia and Alicante.

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