Good morning,
we have a house from 1971 with ETICS (external thermal insulation composite system) – 5 cm (2 inches) insulation.
Our roof is a flat roof, which was renovated this year.
We would also like to renovate our facade at some point. I have read that doing so would require us to upgrade the insulation according to the Building Energy Act.
This would obviously mean considerable additional work, for example because the parapet, etc., would need to be renewed – it was installed on top of the 5 cm (2 inches) insulation.
Now, there is apparently the possibility to be exempted due to economic infeasibility in order to only renew the plaster, for example.
What are the chances of this? What is the best way to approach it?
It cannot be that you can renew the plaster for maybe around 10,000 euros but are then required by the Building Energy Act to insulate and pay three times as much including all related work – that cannot be financially reasonable! Are costs caused by additional work, such as renewing the parapet, included in the calculation of economic feasibility?
Best regards!
we have a house from 1971 with ETICS (external thermal insulation composite system) – 5 cm (2 inches) insulation.
Our roof is a flat roof, which was renovated this year.
We would also like to renovate our facade at some point. I have read that doing so would require us to upgrade the insulation according to the Building Energy Act.
This would obviously mean considerable additional work, for example because the parapet, etc., would need to be renewed – it was installed on top of the 5 cm (2 inches) insulation.
Now, there is apparently the possibility to be exempted due to economic infeasibility in order to only renew the plaster, for example.
What are the chances of this? What is the best way to approach it?
It cannot be that you can renew the plaster for maybe around 10,000 euros but are then required by the Building Energy Act to insulate and pay three times as much including all related work – that cannot be financially reasonable! Are costs caused by additional work, such as renewing the parapet, included in the calculation of economic feasibility?
Best regards!
H
hampshire18 May 2021 09:10If you are only making repairs—plaster remains intact and less than 10% of the surface area is repaired—you do not need to carry out energy retrofitting.
If you are only working on small details or aesthetics, you don’t really have a topic.
The overhang is already quite decent. It’s hard to estimate from the picture, but if you could achieve 8–10cm (3–4 inches), the existing 5cm (2 inches) would already be moving in a very good direction.
The overhang is already quite decent. It’s hard to estimate from the picture, but if you could achieve 8–10cm (3–4 inches), the existing 5cm (2 inches) would already be moving in a very good direction.
hampshire schrieb:
If you are only making repairs—the plaster stays intact and less than 10% of the surface is repaired—you don’t need to do an energy retrofit. I think you also replied to me in my other thread. We have a long, horizontal crack in the facade. Is this something urgent? I mean, could such a crack cause the plaster to crumble or let moisture get into the insulation?
Otherwise, the facade looks like new.
What could be the worst-case scenario here? That the area around the crack needs to be replastered (the 10-percent rule), or could this lead to the entire facade having to be rebuilt with new insulation, etc.?
H
hampshire18 May 2021 09:18I wouldn’t worry about that at all for my house. However, there are people better informed than me here in the forum.
guckuck2 schrieb:
If you’re only doing small fixes or cosmetic work, it’s not really an issue.
The overhang looks quite decent. It’s hard to tell from the picture, but if you could extend it by 8–10cm (3–4 inches), then with the existing 5cm (2 inches) it would already be heading in a very good direction.I measured, it’s 9cm (3.5 inches) plus the 5cm (2 inches), so 14cm (5.5 inches) total. Is that enough for insulation according to the building energy regulations?basti009 schrieb:
I measured: 9 cm plus 5 cm makes 14 cm (5.5 inches). Is that enough insulation according to the building energy regulations?With 14 cm (5.5 inches) of EPS 035, you get about 0.24 W/m²K, which is the limit value, as another user mentioned.
With 14 cm (5.5 inches) of EPS 032, it’s even 0.22 W/m²K.
This only considers the insulation layer itself, not the (unknown) masonry or any possible insulating plaster.
It’s really cutting it close. Ideally, the parapet (attic wall) should have an overhang of 2-3 cm (about 1 inch) so water can drip off and not run down the facade.
In your case, the energy consultant will determine what is most cost-effective.
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