Energy refurbishment: these 10 things you need to know

We give you tips for planning, subsidies& Partner

If you want to noticeably reduce the energy consumption of your home, you can’t avoid energy-efficient renovation. Older buildings in particular often have poor energy efficiency. A burden on the budget, but also on the environment. An energetic building renovation pays off.

1. What is an energetic renovation?

An energy refurbishment makes a building energy fit: the energy consumption for heating, hot water preparation and ventilation is minimized through targeted structural measures. It reduces energy costs noticeably – for property owners and tenants alike. In view of rising energy prices, this is an important argument in favor of energy-efficient refurbishment. At the same time, owners thus make a valuable contribution to the environment. Because renovation reduces CO2 emissions and promotes the use of renewable energies.

2. What is involved in an energetic renovation??

You can reduce your property’s energy needs through a variety of measures. This includes, among others:

  • Thermal insulation measures (especially exterior walls, roof insulation, insulation of the basement ceiling)
  • the replacement of old and leaking windows and external doors
  • the installation of a new, modern heating system
  • the integration of ventilation systems with heat recovery

Which measures are necessary and meaningful, always depends on the concrete conditions.

3. Is an energetic renovation worthwhile?

Yes, if the renovation or modernization is done professionally.

Thermal insulation of the exterior facade and roof saves up to 30 percent of energy costs. However, exactly how much you can save also depends on the condition and material of the structure. A new heating system with heat pump, condensing boiler technology or wood pellet stove can reduce energy costs by around 25 percent.

What is sensible and feasible for your property should be clarified in advance with an expert.

Low energy consumption reduces the burden on the environment and is good for climate protection. With an energetic renovation you also improve the quality of living in your home. And you increase the value of your property. Houses and condominiums that are energy fit sell better than properties with poor energy efficiency.

4. When is an energetic renovation obligatory?

Due to the Energy Saving Ordinance (EnEV), buyers of an existing property are obliged to carry out energy refurbishment. This applies in particular to single-family and two-family homes that were built before 1. February 2002 were built. Buyers should be aware that they may be obliged to carry out refurbishment within two years of moving in if the relevant standards are not met.

  • Replace the old heating system
  • Insulation of pipes
  • the insulation of the roof or the attic

Oil and gas heating systems may not be operated after 30 years of operation. The obligation to renovate concerns so-called standard and constant temperature boilers. This does not apply to low-temperature and condensing technology.

In cold basements, the insulation of heating and hot water pipes is mandatory. According to the EnEV, home buyers must insulate the top floor ceiling or optionally the roof of an old building.

Buildings that have been renovated after the 1. February 2002 already meet certain EnEV requirements. Therefore, the need for renovation is usually not large. But even for houses built in 2000, insulation is usually sufficient.

Incidentally, owners of old buildings are not obliged to carry out comprehensive energy refurbishment of their house. If you commission renovation work, however, it must comply with the EnEV specifications.

You can find more information on the Energy Saving Ordinance here: co2online.en

5. How to proceed if I want to renovate energetically?

First it must be determined where the energetic weak points of your real estate lie. Leaky windows? An outdated heating system? Poor thermal insulation? To find the energy guzzlers, you should involve an expert right from the start. This or these determines by means of energy check, where there are optimization possibilities, what they cost and which they can bring.

Together with the specialist, you then set the roadmap for your energy-optimized home. If you need a new heating system? Can you use renewable energy? What needs to be done most urgently? What can still wait?

It is important to have an overall energy concept for your property. If, for example, you only renew the heating system, but the facade leaks, energy continues to be wasted.

Ideally, the energy renovation is carried out from the outside to the inside. If the building envelope is tight, this already brings a lot of. You need new windows? Then you can perhaps combine this with improved burglary protection at the same time.

You should also consider the costs of energy-efficient renovation or modernization from the outset. How do you want to finance the project? Which subsidies can you use. Contact your savings bank or the Landesbausparkasse (LBS) for financing, for example.

The energy certificate is helpful for buyers of a second-hand property. The seller must present it at a house inspection. The energy performance certificate provides valuable information about the energy condition of the property.

Tip: Before deciding to buy, have a check carried out to determine how large and cost-intensive the renovation requirements for the building are.

6. Where can I find a contact person for the energy-efficient renovation of my home??

The first contact person for energy refurbishment should be a professional energy consultant.

Would you like to take advantage of subsidies from a program of the Kreditanstalt fur Wiederaufbau (K)? Then the best thing to do is to contact experts on federal subsidy programs for energy efficiency in residential buildings right away.

Experts for the federal subsidy programs for energy efficiency in residential buildings.

Energy consultants can be found, for example, at the LBS, at a consumer center, at the TuV or the Bauherren-Schutzbund e. V.

Your savings bank or LBS can advise you on financing.

7. What does an energetic renovation cost?

There is no blanket answer to this. The cost depends on the concrete measures planned. Clearly: the more extensive the measures, the higher the costs.

The following interactive graphic shows average values and serves as a guide.

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