A home with good insulation can save up to 30% of energy, which has direct effects on both the electricity bill that comes at the end of the month and in CO2 emissions to the environment. What precautions should be taken to improve the thermal efficiency of our homes? Here are some notes.


The thermal insulation of a home is the ability it has to retain heat (in winter) or cold (in summer), which basically generated by heating and / or cooling. As much as we invest in a good air conditioner or a good heating system, of little use if the house is well insulated from the thermal point of view.

But not just a question of saving energy or environmental awareness, but also because, in less than a year, from January 1, 2016 – and will run the royal decree announced Certification of Existing Buildings Energy Efficiency , which require that all homes are purchased, sold or rented in Spain have a certificate that guarantees their energy behavior.


Thus, the houses have a distinctive efficiency similar to that already have appliances, which also will affect the sale price or rental thereof. In fact, households are classified by a series of letters that go to the ‘A’ (most efficient) to ‘G’ (degree of lower energy efficiency).

Let us see then what are some of the aspects to consider for improved without large investments, the thermal insulation of our house:


  • In a home heat loss occurs through windows, doors, floors, walls and ceilings. For windows and doors to the outside, it is very important to check for leaks and energy, if any, to take appropriate action. In floors, walls or ceilings is essential a good installation with effective, high thermal resistance. If the home has a few years in the market there are a wide variety of materials that underpin the thermal insulation of a wall, floor or ceiling.
  • The windows are one of the weaknesses of the house. To minimize heat loss or cold it is advisable to have a double glazing system and, if possible, air chamber. Also improve its ability to insulate if they have a quality joinery (PVC, for example) to avoid thermal bridging, and who have a specific glass to reduce heat loss.
  • In summer it is highly advisable to use awnings and blinds to minimize overheating of the house.
  • In winter, however, we must maximize the sunlight and let her through the glass of the window curtains and drapes leaving open.
  • Finally, it is essential to ventilate the house both morning and evening. With 10 minutes is enough to clear the air of a room. If we had time we accumulate excessive heat in summer and let in too cold in winter.