Heating bills have experienced dramatic increases in recent years. Natural gas prices have risen by more than 40% since 2020, and electricity is not far behind. But the price of energy is only part of the problem.

The other major cause is the poor condition of Spain's housing stock. More than 80% of residential buildings in Spain were built before stringent energy efficiency regulations existed. This means that most of our homes have inadequate or non-existent thermal insulation.

The result is a vicious circle: homes lose heat quickly, heating has to work harder to maintain a comfortable temperature, and the bill rises month by month. In a poorly insulated home, turning on the heating is like trying to fill a bathtub with the plug removed.

According to data from IDAE (Institute for Energy Diversification and Saving), an average Spanish home spends between €900 and €1,500 per year on heating. But with the right measures, this expense can be significantly reduced.

Thermal insulation is the measure with the greatest direct impact on the heating bill. The technical data is clear: a properly insulated home can reduce its heating consumption by between 25% and 35%.

Why does it have such an impact? Because insulation addresses the root of the problem: heat loss. In a typical home, losses are distributed approximately as follows:

• Roof and ceiling: 25-30% of heat loss
• Walls: 20-25% of losses
• Windows and doors: 15-20% of losses
• Floor: 7-10% of losses
• Ventilation and air renewal: 20-25% of losses

As you can see, the roof is the area with the greatest thermal losses. This is due to a basic physical principle: hot air rises. If your attic is not insulated, the heat generated by your heating rises and escapes directly outside.

Good insulation creates a thermal barrier that keeps heat inside your home for longer. Your heating needs to run fewer hours and at lower power to maintain the same temperature, which translates directly into savings of between €250 and €450 per year in a typical home.

Of all available energy efficiency measures, attic floor insulation offers the best cost-benefit ratio. And with the CAE program, the ratio is unbeatable because the cost to you is zero.

The most common technique is blown mineral wool insulation. A uniform layer of high-density mineral wool is projected onto the floor of the uninhabited attic, creating a continuous insulating blanket that eliminates thermal bridges.

The advantages of this technique are multiple:

• Quick installation: between 2 and 4 hours for a standard home
• No construction: no renovations or structural modifications needed
• Immediate effectiveness: you notice the difference from day one
• Durability: mineral wool maintains its properties for over 25 years
• Safety: non-combustible material with no harmful emissions

Furthermore, insulation doesn't only work in winter. In summer, the same thermal barrier prevents outside heat from penetrating your home, also reducing the need for air conditioning. It's a year-round improvement.

Although attic insulation is the star measure, combining it with other good habits can maximize savings on your heating bill.

Programmable thermostat: automatically adjusts temperature according to the time of day. Reducing your home temperature by 1°C can save 7% on heating. Program 20°C during the day and 16-17°C at night.

Boiler maintenance: an annual service ensures your boiler operates at maximum efficiency. A poorly maintained boiler can consume up to 15% more energy.

Radiator bleeding: at the start of each heating season, bleed all radiators to remove accumulated air. A radiator with air performs up to 50% less than one properly bled.

Ventilation habits: ventilate intensively (10-15 minutes with windows wide open) rather than leaving windows ajar for hours. This renews the air without cooling the walls.

Smart use of blinds and curtains: in winter, raise blinds during sunny hours to take advantage of free solar heat and lower them at dusk to reduce window losses.

To illustrate the real impact of insulation, let's look at the case of the Martínez family, from a detached house in the province of Alicante.

Before insulation:

• 120 m² detached house with an 85 m² attic
• Uninsulated attic, bare concrete floor
• Natural gas central heating with radiators
• Average heating bill: €135/month in winter (November to March)
• Constant feeling of cold, especially in the upper floor rooms

After insulation:

• Blown mineral wool insulation (200mm thickness) across the entire attic
• Installation completed in 3 hours with no disruption
• Average heating bill: €92/month in winter
• Monthly savings: €43/month (a 32% reduction)
• Estimated annual savings: €215 (for the 5 heating months only)

Beyond the financial savings, the family highlights the notable improvement in comfort: upper rooms maintain a more stable temperature, cold draughts have been eliminated, and the heating turns on less frequently. "It's like living in a different house," they told us.

And all of this without paying a single penny, thanks to the CAE program.

If you're tired of paying exorbitant heating bills, the Energy Savings Certificates (CAE) program is your best ally. This program allows 100% financing of your attic insulation, at no cost to you.

The process with Verdenomia is very simple:

• Step 1: Verify your eligibility in less than 2 minutes through our online form. You just need to answer a few basic questions about your property.
• Step 2: If you meet the requirements, an advisor will contact you within 24 hours to schedule a free technical visit.
• Step 3: A technician assesses your attic and proposes the most suitable insulation solution.
• Step 4: You sign the CAE transfer contract (you transfer the energy savings certificates, which have no value to you as an individual).
• Step 5: Our professional installers carry out the work in just a few hours. No construction, no disruption, no cost.

From the next day, you start enjoying a warmer home in winter, cooler in summer, and significantly lower heating bills. There's no fine print, no hidden costs: it's an official program backed by Spanish legislation.

Don't wait any longer. Every day without insulation is energy and money escaping through your roof. Check now if your property is eligible.