Thermal insulation

You can improve the thermal insulation of your home in one day and without intrusive building works to make it more comfortable from day one and for ever more. Make your home as comfortable as possible with the most advanced and sustainable insulation solutions.

Calculate your insulation rating

Heat your home, not the planet. Improve the insulation of your home.

The benefits of having Smart Insulation

Calculate your potential insulation

Answer a few simple questions and find out what it is

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

1/4 Type of home

Next: Size of home

1. Select home type

Choose home type that best suits the characteristics of your home.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

2/4 Size of home

Next: Wall cavity size and finishes

2. Select the size of your home

Choose the surface area of your home closest to its actual size.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

2/4 Size of home

Next: Wall cavity size and finishes

2. Select the size of your home

Choose the surface area of your home closest to its actual size.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

2/4 Size of home

Next: Wall cavity size and finishes

2. Select the size of your home

Choose the surface area of your home closest to its actual size.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

2/4 Size of home

Next: Wall cavity size and finishes

2. Select the size of your home

Choose the surface area of your home closest to its actual size.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

3/4 Wall cavity size and finishes

Next: Summary and personal details

3. Wall cavity size and finishes

Choose the thickness of the insulation cavity and your preferred finishes.

Type of home

1

Size of home

2

Wall cavity size and finishes

3

Summary and personal details

4

4/4 Summary and personal details

4. Summary and personal details

Check that everything is as you want and enter your personal details

This is the equipment you have selected

Type of home:

Surface area: Up to m2

Wall cavity size and finishes: -cm wall cavity

Wall cavity size and finishes: Option

Personal details

We need your data to be able to make a budget that is as real and adjusted as possible.

Yes

No

€/month incl. VAT in 12 interest-free payments

Estimated price for

linear meters of exterior façade insulation, height of 2.5m and 20% of wall cavities. Volume of wall cavity to be filled approximately

m3. Estimated reduction of heating and cooling consumption of 15% for homes constructed before 1980, and of 10% for homes constructed between 1980 and 2006

m3. Estimated reduction of heating and cooling consumption of 20% for homes constructed before 1980, and of 15% for homes constructed between 1980 and 2006

Icono atención cliente

Any more questions?

Call us or drop us a line and we'll contact you to evaluate whether our thermal insulation solution is right for your home.

Any questions?

Here you'll find some of the most frequent questions, with their answers, in case they are helpful for you.

Thermal insulation consists of controlling heat transmission from a building, insulating it from the outside temperature or from other parts of the building to minimise heat loss in winter and gains in the summertime.

Thermal insulation is the main, cheapest and most effective energy-saving measure. What's more, most thermal insulation provides effective sound insulation, keeping bothersome noise out of the building.

Because 40 % of the energy consumed by Spanish households is used for heating and cooling.

There are numerous simple ways of insulating the home which can significantly reduce the amount of heat wasted and keeping gas and electricity bills lower (for heating and air conditioning).

Any renovations and modernisation carried out on the home are a superb occasion for analysing energy efficiency and insulation: you'll gain in comfort, lower your bills and emissions and add to the value of your home.

Spain has set itself an objective within the National Integrated Energy and Climate Plan (PNIEC) to upgrade 1.2 million homes by 2030.

The roof, walls, windows, doors and floors are the main areas where warm air escapes and cold air gets in.

Although there is no "one-size-fits-all" solution, generally speaking, houses lose warmth as follows:

  • From 30 % to 35 % through walls and thermal bridges.
  • Around 25 % through the roof and terraces.
  • Up to 25 % through doors, windows, seals, and cracks.
  • Between 7 % and 15 % through the floor, depending the type of home.
Imagen aislamiento

That's why insulating your walls and roof is the quickest and most efficient way of reducing energy consumption in the home.

There are three main methods for improving thermal insulation of walls and roofs:

  • From the outside: it's the most efficient way to reduce energy demand, with the External Thermal Insulation Composite System (ETICS) or ventilated façade. The drawback is that the project must tackle the entire building, it can take several weeks, and it is the most expensive solution.
  • From the inside (facing shell): there are numerous versions of this solution on the market available for installation. The drawback is that it reduces the amount of living space in the home and does not deal with thermal bridges.
  • In the middle: a very quick, economical and effective technique is insulation injecting insulating material into the air chambers of walls and roofs, provided that the dwelling has double partition walls (double-leaf façades, façades with air chambers) or a false ceiling. The drawback is that it can only be used if there is an air chamber. Like the facing shell method, it does not resolve the thermal bridge issue.

You can also improve openings, improving insulation of exterior doors and windows. There are many ways to improve insulation with windows, installing double glazing in metal-framed windows, with or without thermal bridge breaking, or triple glazed windows with low emissions treatments and PVC frames with excellent thermal efficiency. Depending on the climate, the orientation of the gap and your budget, you will always find a solution that will improve the energy efficiency of the home.

Iberdrola offers a Smart Insulation service to insulate your home using blown cavity wall insulation. What's more, in the case of top-floor flats and detached homes with false ceilings, we can also insulate the roof. This also applies to homes with uninhabited basements.

The first noticeable change in the home is comfort. It will stay warmer for longer in winter and cooler in summer. In winter, I will notice that the walls are not as cold as they used to be before I installed the insulation and that my home will feel far more comfortable. I will notice less difference in the temperatures between different parts of the rooms.

The heating/cooling system will start up less frequently, and I will notice fewer temperature variations. This will mean lower heating/cooling bills.

Improved insulation helps to prevent draughts, moisture and mould, improving living conditions and health.

Yes. There are subsidies available for up to 80 % managed under each region's recovery and energy transition plans. Iberdrola provides you with a system for managing these subsidies, supporting you throughout the process.

If the home has double partition walls (double leaf façades, façades with air chamber) or false ceilings, insulation by blowing insulating material into these chambers is a quick, economical and effective technique.

The insulating material is blown into the air chamber, filling the entire cavity and providing homogeneous insulation while stopping draughts. And it also provides sound insulation!

The solution has been used for more than 30 years and is used widely in countries with a continental climate. In the United Kingdom, more than 10 million homes have been fitted with blown cavity wall insulation. Different materials are used depending on the type of chamber and home. We can advise you on which material is most suitable for your home.

Holes are made in the brick or in the partition wall and the insulation material is blown through. The holes are then carefully sealed so that there is no sign of the operation. Holes are made all over the façade so that the insulation covers the entire wall. The insulation completely fills the air gap, leaving a layer of insulation that not only insulates but also prevents outside air from coming through the air gap.

It can be done from either the outside or the inside. In the case of flats, it is done through the inside to avoid using scaffolding and supporting structures.

If you want to install blown cavity wall insulation in your home, you need to find out if there is an air chamber in your walls.

If your home was built after 1960 and before 2006, it most likely has air chambers. If it was built after 1979, it probably has some insulation, although it is probably insufficient.

If the wall sounds hollow when you bang on it, or if when you go close to the socket (without touching it) you notice air currents, then you have air chambers.

In any case, an Iberdrola partner can come to your home to see if there is an air chamber and measure its thickness to provide you with an estimate for blown cavity wall insulation.

No. It's a simple process. It takes just hours or a day to insulate a flat. In the case of a detached house, it can take one or two days to insulate.

The operation can be carried out from the inside or the outside, provided that there is a common electricity supply for the blower. In the case of tiled rooms, it is preferable to insulate from the outside to avoid perforating the tiles.

There is no requirement for a building permit and additional equipment is only needed in the case of high buildings. In such cases, if the building residents' association agrees, the cost of additional measures is offset with the economy of scale of making the improvement jointly.

The benefits of thermal insulation continue throughout the life of the building. It needs no maintenance and there are therefore no additional costs.

Different materials are used in blown cavity wall insulation, but they all have properties or treatments that mean they require no maintenance. Thermal insulation will reduce the demand for energy in the home, which will put a smile on your face when you see your fuel bills are lower, year after year. The planet will thank you, too. What's more, it will improve your quality of life and provide sound insulation.

There are several materials including wool (mineral wool or rock wool), cellulose and expanded polystyrene insulation (EPS).

Mineral wool and rock wool have similar insulating properties and both are a very good choice if the air gap is of sufficient size (from 4 or 5 cm gap thickness). Both are non-combustible, with A1 fire rating. They help to make buildings more fire resistant. Both are permeable to water vapour, which means that the building can breathe, allowing water vapour through the walls. Both are non-hygroscopic, so they do not absorb moisture. They also provide some sound insulation and are very durable, with a service life of more than 50 years. Glass mineral wool is used to insulate smaller chambers, from 3 cm upwards, and allows the use of smaller nozzles.

EPS is the material of choice for very small chambers, from 2 cm upwards, as it gives better coverage. On the downside, it is more expensive and does not insulate from noise.

Cellulose has the advantage of being a recycled material, which helps to make it more sustainable, however it must be treated to make it fireproof and to absorb the minimum amount of water, which gives it a Class B insulation material rating. Because it absorbs water, it is not suitable for installation on façades, because it would not comply with the technical building code (CTE).

No. It is the most economical option for reducing the need for heat and cold in a home.

It costs between around €800 and €1,500 to insulate a flat. A detached home from €1,200 to €2,500 or even more in the case of a large property.

The thicker the chamber, the more insulating material is needed to fill it and the greater your savings on heating and air conditioning.

It's the ideal solution if you have air chambers and gives you the best return on each euro invested in insulation.

To ease the initial outlay, Iberdrola has agreements with lenders that will allow you to finance it. That means you can pay for your installation while you save on your bills.

The amount will depend on the size of your home, the type of heating and the thickness of the chamber. In the case of a home with a gas boiler with an annual consumption of €550, saving 20% of the gas used for heating will reduce the annual bill by around €90 and prevent the emission of 240 kg of Co2 every year. If you have an oil-fired or LNG boiler, the emissions avoided will be higher.

The more you spend on heating your home, the bigger the potential savings and reduction of emissions.

If you also decide to upgrade your heating system, you can choose something less powerful, which will be kinder to the environment and make more savings.