ENERGY EFFICIENCY

The XXI century is the century, when mankind set as a priority to turn to a healthier way of life. The preservation of the planet begins by preserving the own health and way of life. In our case, it is about preserving the way of life.

The concept ENERGY EFFICIENCY is usually met in two possible contexts, one of which refers to devices, while the other one refers to measures and behaviours.

ENERGY EFFICIENCY devices are those with a high level of useful effect, i.e. with small losses during the transformation of one form of energy into another.

ENERGY EFFICIENCY MEASURES

Energy efficiency measures are those measures taken in order to reduce the consumption of energy. Whether we deal with technical or non-technical measures or behaviour changes, all the measures imply the same or even a higher level of comfort and better standards.

The most frequent measures taken in order to reduce energy losses and increase energy efficiency are:

  • replacing non-renewable energy resources with renewable one
  • replacing inefficient energy consumers with efficient ones
  • insulating the premises that are being heated
  • replacing the worn-out joinery at the premises that are being heated
  • installing measurement and regulation devices for energy consumers
  • implementing tariff systems, by which energy distributors encourage energy savings etc.

ENERGY-EFFICIENT HOUSES

“Passive House Standard” is a concept that raises quality to its limits, in order to achieve maximum comfort and energy efficiency. The “Passive House” concept was developed in Germany in the 80’s and it is strictly defined by Pi (Passivhous Institut) in Darmstadt, Germany. It represents the set of directives, on which all modern energy saving standards are based.

 

From the point of building new premises and in terms of energy savings, this is the strictest standard in the world.

The implementation of new standards by Husbanken for the concession of mortgages has made Norway the world leader in the fight against energy losses, i.e. in the construction of new buildings by applying the most advanced standards. The building standard that is currently enforced in Norway is TEK10. It is expected that the new TEK17 standard will go into force in the near future, in order to get as close as possible to the international standard set in Germany during the 80’s. The implementation of the TEK17 standard is not compulsory yet, but its compulsory implementation is expected soon.

The “Passive House” standard has strict limits for the U value (thermal conduction) of the building materials used in the construction of new buildings. The biggest challenge of every project is finding the right formula for the usage of the suitable materials in the correct proportion during the construction of external walls and roof structures.

INSULATION OF THE PREMISES

According to the passive standard, the U value of the outer walls should not exceed 0.15 W/m2K. It is recommended that the thermal transfer coefficient of the outer walls should be as low as possible, up to a value of U=0.1 W/m2K, if possible. In order to achieve that, it is necessary to use 400 mm of mineral wool in the Wooden Frame structure.

 

In the case of outer walls with contact façade (which are not common in the Scandinavian market), the outer covering of the wall is a façade made of expanded polystyrene (XPS) and the mineral wool used in the wooden frame structure may have a thickness of less than 400 mm, depending on the thickness of the expanded polystyrene used as outer covering of the façade wall.

In order to reduce the influence of thermal bridges while building the wooden frame structure, it may be convenient to replace the wooden frame structure with a I_joist structure. An installation plane with additional 50 mm of mineral wool must be made on the inner side of the wall.

Norway quickly joined the energy saving marathon.

SEALING THE PREMISES

In order to increase the energy efficiency of your building, it is necessary to pay attention to SEALING THE PREMISES, i.e. the prevention of “AIR LEAKS”. Our goal is to preserve (maintain) the desired heat in your building. We struggle to prevent energy losses caused by the passage of air through cracks in the premises. The Blower Door Test that we carry out at the end of the installation represents our responsibility to your building.

That is something that can be achieved only by means of a suitable behaviour in the production of the elements used in your building and by sealing them correctly, when they are assembled.

A LASTING HOUSE

Wood is the basic material that we use for the construction of your house. Particular attention should be paid to preventing the passage of moisture into the wooden elements used in the construction of your building.

Our professional team pays special attention to: The selection and proper application of materials that prevent the penetration of moisture into the wooden elements of the house that we build for you.

We use materials that have the best characteristics among those in offer.

We pay exceptional attention to:

  • The juncture of the wooden elements and the foundation;
  • The sealing of all wet nodes in the house;
  • The films that we use to prevent the occurrence of condensate;
  • The protection of the facade;