ᐅ How important is a "traditional" roof in the era of photovoltaic systems?
Created on: 6 Nov 2024 09:29
T
tempusfugit
Hello everyone,
Our construction project is currently being reviewed by the architect, but I would be very interested in the forum members’ opinions regarding the upper part of the house.
The house (bungalow) faces almost directly south and will have a roof pitch of about 20 degrees. The total roof area is approximately 14 x 14 meters (46 x 46 feet) with a gable roof, and there is no shading from neighboring buildings or similar. Given the affordable solar panels and energy storage options, a full coverage with solar panels makes sense (heat pump, electric car, home office).
Now the question is, how up-to-date is a traditional roof covering with clay tiles beneath the solar panels?
What options would there be if one plans to build an insulated roof with photovoltaics in 2025, prioritizing the most economical solution?
Our construction project is currently being reviewed by the architect, but I would be very interested in the forum members’ opinions regarding the upper part of the house.
The house (bungalow) faces almost directly south and will have a roof pitch of about 20 degrees. The total roof area is approximately 14 x 14 meters (46 x 46 feet) with a gable roof, and there is no shading from neighboring buildings or similar. Given the affordable solar panels and energy storage options, a full coverage with solar panels makes sense (heat pump, electric car, home office).
Now the question is, how up-to-date is a traditional roof covering with clay tiles beneath the solar panels?
What options would there be if one plans to build an insulated roof with photovoltaics in 2025, prioritizing the most economical solution?
- Traditional roofing first, then adding the solar mounting system?
- Sandwich panels or even roofing felt like in the USA, with solar panels mounted on top?
- Integrated/in-roof solar modules like SunRoof (probably the most expensive solution)?
tempusfugit6 Nov 2024 11:25nordanney schrieb:
What do you mean by that?In my US house, the popping sounds weren't really noticeable (they use a lot of permanent elastic sealant there), but there was no intermediate ventilation or anything like that, and there was quite a bit of condensation—although that was probably more due to the overall construction method.N
nordanney6 Nov 2024 11:32tempusfugit schrieb:
but there was no intermediate ventilation or anything like that, and there was quite a lot of condensation – but that was probably more due to the general construction method. Yep. You won’t have that problem here in Germany. Buildings here are constructed “properly.”
I didn’t even notice any loud banging sounds; at first, it felt more like living inside a guitar or a cello. The material (metal-PUR/PUR-metal) certainly offers very little sound insulation compared to wood fiber insulation boards or similar, of which we should have at least placed a thin panel in between.
Overall, I wouldn’t see any real advantage compared to traditional construction methods.
Overall, I wouldn’t see any real advantage compared to traditional construction methods.
tempusfugit6 Nov 2024 11:46Arauki11 schrieb:
Standard, inexpensive flat tiles and full-area photovoltaic panels on both sides; in the end, I think you will like it that way too.
With a sandwich roof, I was concerned about noise issues, which was a problem for us even though we live in a rural area. The external rafter insulation works great against temperature but is quite poor for sound insulation, so we could even hear the neighbor’s trash bin lid or loud wind noises. We eventually found a solution, but we probably should have included a soundproofing layer in between. Interesting point about the noise problem. I would have also considered insulation between the rafters.
In terms of cost, I still need to get quotes from roofers — so far the estimates have been quite expensive. Even with the cheapest tile (Braas Opal Bieber) and 24x10 rafters.
tempusfugit schrieb:
I would have also considered insulation between the rafters.Then this problem wouldn't exist. Personally, I prefer exposed beams much more, and I believe that insulation above the rafters also offers several advantages.
In general, compared to previous houses I have known, I now understand that high-quality insulation should have an extremely high priority.
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hanghaus20236 Nov 2024 12:56nordanney schrieb:
Yep. In Germany, you won’t have any problems with that. Construction is done "properly" there. Do you mean construction in the US is not done properly?
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