ᐅ Structural Engineer and KfW55 Certification

Created on: 2 Aug 2016 15:23

Hello everyone,
despite extensive research, I haven’t been able to fully understand how responsibilities are divided regarding energy requirements/energy performance certificates for a new build.
I hope you can help me.

We are planning to build a detached house and need to comply with the KfW55 standard.
The structural engineer and the certified energy efficiency expert authorized to submit the KfW application are two different people in our case. The question is:
Can the structural engineer carry out all the necessary calculations to meet the KfW55 standard so that the energy efficiency expert only needs to review everything, submit the application, monitor the construction implementation, and finally confirm it?
Or is the structural engineer not allowed to do this, meaning that I also need the energy efficiency expert to perform the planning services to ensure compliance with the KfW55 standard, in addition to the tasks described above?

Thank you very much for your support.
nihoelz

nihoelz2 Aug 2016 21:03

MarcWen schrieb:
So far, we haven’t received anything from the structural engineer. However, since the following must be submitted to the building authority before construction starts:

Proof of sound insulation
Proof of thermal insulation
Proof of structural stability
our structural engineer must have prepared these documents accordingly.

Does this mean these documents MUST come from the structural engineer? Or can the KfW expert also provide the proof of thermal insulation?

Bauexperte2 Aug 2016 21:09

nihoelz schrieb:

So, these documents MUST come from the structural engineer?

These documents must be submitted to the approving authority before or at the latest at the start of construction.

nihoelz schrieb:

Or can the KfW expert also prepare the thermal protection certificate?

Not just "or" – the thermal protection certificate must be prepared by a government-certified expert in sound and thermal insulation. If the structural engineer is also certified for this, they can prepare the certificate; if they are "only" a structural engineer, the aforementioned expert must perform the calculations.

Regards, Bauexperte

nihoelz2 Aug 2016 21:32

So I understand correctly: any energy or thermal aspects must in any case be evaluated and considered by the KfW expert in our case, so these items can be excluded from the structural engineer’s scope of work?

Bauexperte2 Aug 2016 22:01

#10

First of all – please complete your profile according to the forum rules; “B.” is not a professional designation!

nihoelz schrieb:
So, I understand correctly: any energy or thermal aspects must be considered and determined by the KfW expert anyway, so these issues can be excluded from the structural engineer’s scope?

You have an architect; they will know which tasks need to be assigned to whom.

Do you have a justified concern that mistakes might occur in this regard, or why are you asking so specifically?

Best regards, Bauexperte

nihoelz3 Aug 2016 10:24

#11

Indeed, I did not receive any clarity on this point from the architect and therefore asked here.
Thank you very much for the answers.

Bauexperte3 Aug 2016 10:53

#12

nihoelz schrieb:
Indeed, I did not receive any clarity on this point from the architect, which is why I asked here.

You should have a clarifying conversation with your architect and, depending on the outcome, consider whether to continue working with them.

I expect an architect to provide comprehensive explanations to their clients—more so than a salesperson.

Edit: Thank you!

Regards, Bauexperte

ᐅ Structural Engineer and KfW55 Certification

Reaktionen