Homes built more than two decades ago, while often holding significant architectural and emotional value, typically fall short of today’s energy efficiency standards. This mismatch results in higher energy consumption, increased utility bills, and reduced indoor comfort. Fortunately, undertaking renovations to improve energy efficiency not only lowers costs but also increases the property’s value and enhances the quality of life for its occupants.
How to improve the energy efficiency of a home built more than 20 years ago:
One of the key factors in these homes is thermal insulation. Many of these properties lack an adequate thermal envelope, leading to heat loss in winter and allowing heat to enter during summer. There are solutions such as external insulation systems like SATE (External Thermal Insulation System) or internal insulation using materials like wood fiber or mineral wool, which can significantly improve comfort without altering the building’s aesthetics. Although internal insulation may be more economical, it reduces usable floor space and can make it difficult to preserve interior elements such as original tiling.
Windows are another critical element. Over time, many have become obsolete in terms of their insulating properties. Nowadays, double-glazed windows with PVC or thermally broken aluminum frames can be installed, preserving the original character of the façade while significantly enhancing energy performance. Complementing them with thermal shutters or external blinds also helps regulate indoor temperatures effectively, maximizing energy efficiency.
In addition to high-quality window and door joinery, solar protection systems play a crucial role in improving energy efficiency. Installations such as external shutters or retractable awnings help block direct solar radiation, preventing indoor overheating during the summer. These solutions also help reduce the need for air conditioning and other cooling systems, contributing to overall energy savings.
Climate control is another area where substantial improvements can be made. Systems such as aerothermal technology, which use energy from the outside air for heating and cooling, are highly efficient and sustainable. Furthermore, incorporating mechanical ventilation with heat recovery helps maintain excellent indoor air quality while optimizing energy efficiency.
An important part of energy renovation involves addressing thermal bridges—areas where heat loss is most pronounced. These are typically found at window joints, wall corners, floor-to-wall connections, and metal structural elements. Several common solutions can be applied to improve these critical points and reduce heat loss, such as sealing windows with weatherstripping, adding insulation at wall corners and floor joints, and insulating metal elements like beams and columns with suitable materials. These strategies contribute significantly to reducing energy loss and improving the home’s thermal performance.
Finally, regarding public grants for energy-efficient renovations, it is essential to check current programs and funding calls, as they can vary depending on the region. In many autonomous communities, these programs are now managed by Consellería, and available subsidies may cover between 40% and 80% of the total renovation costs. Additional support may also be available for the installation of photovoltaic systems and for improving the energy performance of buildings. We recommend staying informed about calls and conditions that match your project’s needs.
Renovating a home over 20 years old is not only a smart financial decision but also an investment in well-being, comfort, and sustainability. At our studio, we specialize in renovations that preserve the original character of each home while adapting it to today’s standards. If you’re considering upgrading your home, we would be happy to assist you with personalized solutions and expert guidance.
