The Rockwool company summarizes the main changes in the new Basic Document of Energy Saving in Buildings DB -HE of the Technical Building Code (CTE) in their guide “What changed from March 12 ?”. In the Document, the requirements in new building are increased to reduce energy consumption and demand and new specifications for already built ones are also included.
Last Wednesday March 12, the new Basic Document of Energy Saving in Buildings DB -HE of the Technical Building Code (CTE) approved in September 2013 entered into force. This new DB increases the requirements in building, for this sector to contribute to the country’s energy saving and CO2 emissions reduction goals as expressed in the Kyoto Protocol and in the European targets called 20-20-20.
More efficiency in building
It is estimated that most of the energy we consume daily comes from non-renewable sources, so making rational use of it is necessary to manage natural resources and thus avoid environmental damage.
“In this aspect,” says Pedro Luis Fernández- Cano, director of the Rockwool Peninsular Business Unit, “The construction sector plays a key role. Almost 50 % of total energy consumption is produced by buildings, especially homes. This is the reason why architects, businesses and organizations around the world are trying to find resources that will lead to sustainable construction. ”
New features included in the new text
The major change introduced in this new DB -HE consists of limiting the maximum consumption of buildings. In new building or expansions of non-residential buildings, these should achieve a Class B or higher and for residential ones, they will have a maximum consumption of primary energy.
Existing buildings, meanwhile, must adapt their features to this new code and achieve a maximum joint demand, for which they must comply with the new values when modifying elements of the envelope or when retrofits in more than 25% of the building’s thermal envelope are made.
Although the requirements are tougher than those in the DB -HE 2006, they are far from the levels required in other European countries. They are therefore to be reviewed in the near future to achieve NZEB buildings (nearly zero energy balance buildings) .
One of the most efficient and low cost ways to meet new and future requirements is to apply insulation systems in the building’s envelope, and investing in efficient enclosures (windows and doors). These solutions must be cost-optimized, ie those which, taking into account all costs over the life of the building (both the initial investment and the savings produced) are the most economical.
Guide, What changes from March 12?
Rockwool has a technical service offering advice for the correct application of the new DB -HE Basic Document, as well as a Guide of the main changes “What changes from March 12 ? “
According to Pedro Luis, “now buildings must ensure their energy certification level. Thus, when buying a house, users will be aware of the benefits of this building. In this sense, the DBHE is an extremely important step forward for the consumer, which is becoming increasingly aware of environmental care and in savings in energy consumption, and this also impacts us very positively as an industry.”