ᐅ Is Summer Thermal Insulation Mandatory for New Construction?

Created on: 21 Jun 2019 21:30
C
crion
Good evening everyone!

We are currently about to submit the building notification in Bovenden, just north of the city boundary of Göttingen (Lower Saxony), and we just had our architectural meeting with the architect from our home builder FIBAV.

During the meeting, the topic of roller shutters briefly came up, and we said that we do not want any.
The response was that we should or must consider an alternative type of sun protection.
For us, the issue was settled: we currently live in a rental apartment owned by a Göttingen housing cooperative, first occupied in 10/2014, without roller shutters.

However, afterwards I felt somewhat concerned and asked by email.
The very quick reply was:
“Summer heat protection according to DIN 4108 Part 2 is mandatory and is calculated by [...].
This shows which rooms must be equipped with shading.

Provisions for possible later shading systems can be integrated into the façade either before or after construction.
Please discuss this with your construction manager. He can then coordinate it with the trades.”

It’s good to know that summer heat protection according to the standard is mandatory—also to prevent the majority of people from retrofitting energy-intensive air conditioning later, no question.
But is summer heat protection also a legal or otherwise mandatory requirement, or can we omit it without facing any sanctions—worst case, a forced retrofit?

If summer heat protection is somehow a sanctionable obligation: does it have to be an external shading system?
My wife cannot live without curtains, so we already have some form of interior sun protection—of course less effective than external shading, but present.
We will not install an air conditioning system later...

Regardless of whether it is mandatory: What are the most cost-effective options for reasonably effective heat protection?
Or is that already provided by curtains?

Best regards,
Christian
H
haydee
23 Jun 2019 18:10
Straps are still available.
In a passive house, this is not possible due to the openings.

Shading is important and difficult to retrofit.
G
guckuck2
23 Jun 2019 18:14
Straps are clear thermal bridges. Energy loss is one issue, but cold walls = condensation = a breeding ground for mold is another.
Besides, this is outdated since 1970. Sorry. This simply isn’t done anymore in new construction. Not to mention the comfort aspect. In existing buildings, electrification of roller shutters is often at the top of the renovation wish list, but in new construction, it’s omitted? Really penny-pinching in the wrong place. This is not a golden faucet debate.
blackm8823 Jun 2019 18:18
Apparently, straps are no longer used because they allow too much air exchange, which is bad for the blower door test. Cranks form a closed system with no air exchange. So: crank or electric operation. Access for maintenance should be from the outside to avoid large thermal bridges here as well! However, this means there will be no interior windowsill left for plants.
Tip: Aluminum roller shutters. Plastic ones become brittle, the slats can crack and may deform. There are also several threads about this topic...
H
haydee
23 Jun 2019 18:28
It depends on the window sills—we have some. With a 45cm (18 inch) wall thickness, the windows were set flush to avoid gaps.

Straps might be the 70 series. For switches located directly next to the windows, without any networking or central control, there is not much difference in comfort.
Switches next to the door, central control, or automatic operation via KNX provide a real increase in comfort.
Y
ypg
23 Jun 2019 19:57
hanse987 schrieb:

If you want or even need good results from a blower door test, then this can become an issue. I think this is often why there is resistance to straps.


We have a nice, modern house. Older users here know it. Our blower door values are good, though not quite enough for 55, and we only aimed for 70. We use straps, and yes, they don’t exactly look elegant, but we don’t really focus on those; instead, we enjoy our furnishings, the wonderful garden views, and generally live in our house rather than just occupying it.

And if a rain shower or some other fancy electronic gadgets aren’t financially feasible, then it’s just a normal shower (this is a placeholder for anything others might consider socially inferior standard) and the straps.

But thermal insulation is essential. It’s like a necessary heating system.
H
HilfeHilfe
24 Jun 2019 07:22
Bookstar schrieb:

They are idiots, don’t worry about it.

now now now

It’s perfectly fine to keep up with the times. Firstly for aesthetics, and secondly, if my kids were to touch it with their greasy fingers, it would soon look dirty.

Everyone has to decide for themselves. Spend a few more euros and you get a nice solution.