Attic insulation is undoubtedly the most effective measure for improving a home's energy efficiency. The data is compelling: up to 30% of your home's heat escapes through the roof when the attic is not properly insulated.

This means that in winter you're heating the street, and in summer, outside heat penetrates directly into your living spaces. The result: an overworked heating and air conditioning system and ever-rising bills.

Insulating the attic floor with high-density mineral wool creates an effective thermal barrier that keeps the indoor temperature stable. Furthermore, thanks to the Energy Savings Certificates (CAE) program, this work can be done completely free for homes that meet the eligibility requirements.

Installation is completed in just a few hours, with no major construction or disruption. It's the (free) investment with the highest return in energy efficiency you can make in your home.

The heating system is the largest energy consumer in most Spanish homes, accounting for 40% to 60% of the energy bill. Optimizing it is essential to reduce consumption without sacrificing comfort.

Installing a programmable thermostat is the first step. It allows you to adjust the temperature according to the time of day: reducing it at night or when you're not home can save 10-15% on heating. The ideal temperature is 20-21°C during the day and 15-17°C at night.

Regular maintenance is equally important. An annually serviced boiler operates more efficiently and safely. Bleeding radiators at the start of each heating season removes air pockets that reduce their performance. And don't forget to turn off radiators in rooms you're not using.

Windows are one of the most vulnerable points in a home's thermal envelope. A window with single glazing loses up to 5 times more heat than a well-insulated wall.

If you have old single-glazed windows, replacing them with double glazing with thermal break can reduce heat loss through windows by up to 50%. It's a significant investment but with a clear return in comfort and savings.

If you can't change the windows, there are more affordable measures: fitting adhesive draught strips to the frames to seal air infiltrations, installing solar control films on the glass, or using thick thermal curtains at night. These simple measures can reduce losses by 10-20%.

Ventilation is necessary to maintain good indoor air quality, but doing it incorrectly can result in enormous energy waste. The most common mistake is leaving windows open for long periods in winter, cooling down the entire thermal mass of the home.

The recommendation is to ventilate intensively and briefly: open all windows wide for 10-15 minutes a day, preferably first thing in the morning. This method completely renews the indoor air without cooling the walls or furniture.

Avoid leaving windows in tilt mode for hours, as this produces very slow but continuous air renewal that progressively cools the home. In summer, ventilate at night when the outside temperature drops and close up during the hottest hours.

If your home has humidity problems or insufficient ventilation, consider installing a mechanical ventilation with heat recovery (MVHR) system that renews air efficiently while recovering some of the heat.

Replacing all lighting in your home with LED bulbs is one of the simplest and most cost-effective measures you can take. LED bulbs consume up to 80% less energy than traditional incandescent bulbs and 50% less than compact fluorescents.

In addition to their efficiency, LEDs have an extraordinary lifespan: they last between 15,000 and 50,000 hours, compared to 1,000 hours for an incandescent bulb. This means that, besides saving on electricity, you save on replacement bulbs.

To maximize savings, choose the right wattage for each room (don't light your bathroom like an operating theatre), make the most of natural light during the day, and consider installing motion sensors in hallways and transit areas. Every small action counts.

Appliances account for approximately 25% of a household's electricity consumption. When the time comes to replace them, choosing models with the best energy label will make a significant difference to your bill.

The difference between a class A appliance and a class D or E can mean 50-60% savings in electricity consumption over its lifetime. The most important are those that run continuously (fridge, freezer) or are used frequently (washing machine, dishwasher).

In the meantime, you can optimize the use of your current appliances: always run the washing machine and dishwasher at full load, choose eco programs when possible, defrost the fridge regularly, and don't preheat the oven longer than necessary. Small habit changes that add up to considerable savings.

Many homeowners are unaware that programs exist that 100% fund energy efficiency improvements in homes. The most notable is the Energy Savings Certificates (CAE) program, which allows you to get your attic insulated completely free of charge.

Unlike traditional subsidies, CAEs don't require waiting for calls for applications or advancing money. The process is immediate: you verify your eligibility, a technician assesses your home, and if you meet the requirements, installation is carried out within days at no cost.

At Verdenomia, we specialize in managing the entire CAE process for attic floor insulation. We handle verification, planning, professional installation, and administrative processing. You just sign and enjoy a more efficient and comfortable home.

Don't miss this opportunity: every day without insulation is energy (and money) escaping through your roof.