Underfloor heating in new builds in Spain: what works and what doesn't?

Vloerverwarming in nieuwbouw Spanje: wat werkt wel en niet?

A new build in Spain is increasingly equipped with underfloor heating. It provides comfort, an even temperature, and a luxurious appearance.

Still, there are many questions about underfloor heating combined with different floor types.

What works well? What doesn’t? And what should you watch out for in a new build on the Costa Blanca?

In this article, we explain it clearly.

What types of underfloor heating are there?

In Spain, we mainly encounter two systems:

1. Water-based underfloor heating

This system works via pipes with warm water in the floor.

Advantages:

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

2. Electric underfloor heating

Works via electric cables or mats.

Advantages:

  • fast heating
  • ideal for bathrooms
  • easier to install

For entire homes, water-based systems are usually chosen.

Which floor works best with underfloor heating?

Not every floor works equally well with underfloor heating.

Good choices:

PVC (dryback) / LVT

  • excellent heat conduction
  • comfortable
  • stable with temperature changes

Tiles

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

Less suitable:

Wood (solid)

  • can expand and contract
  • sensitive to temperature differences

Thick carpets

  • insulate heat
  • reduce efficiency

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

In practice, we regularly see the same mistakes:

  • floor chosen without considering the system
  • underfloor heating is started up too quickly
  • no consideration of build-up and drying times
  • wrong glue or materials used

This can lead to:

  • cracks
  • flooring coming loose
  • poor heat distribution

The start-up protocol: crucial but often forgotten

After installation, underfloor heating must be started up gradually.

This means:

  • gradually increasing the temperature
  • taking into account drying times of the substrate
  • preventing stresses in the floor

This is often underestimated but is essential for a good result.

Leveling and underfloor heating

In new builds, it is often assumed that the floor is immediately suitable.

In reality, leveling is often necessary, especially with PVC floors.

A flat surface ensures:

  • better heat distribution
  • a neater final result
  • less risk of problems

Also read our article about
👉 leveling in a new build home in Spain
for more explanation.

When do you arrange underfloor heating and flooring?

Timing is everything.

A good sequence is:

  1. installation of underfloor heating
  2. drying and starting up
  3. leveling (if necessary)
  4. laying the floor

Working too fast = problems later.

Underfloor heating in new builds on the Costa Blanca

In the Costa Blanca, we see a clear trend:

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

This combination offers:

  • comfort
  • energy efficiency
  • a modern look

Advice on underfloor heating and floors

Are you unsure 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 underfloor heating and floor finishing.

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

Port of Altea operates throughout the Costa Blanca, including:

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

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