Hello,
I would like to build a house with an exposed roof structure visible from the upper floor, featuring a shallow gable roof without an attic. What roof pitch is advisable (with the intended covering being tiles), and why? Is the following correct, and are there any additional considerations (in North Rhine-Westphalia)?
Are there significant cost differences depending on the roof pitch?
I would like to build a house with an exposed roof structure visible from the upper floor, featuring a shallow gable roof without an attic. What roof pitch is advisable (with the intended covering being tiles), and why? Is the following correct, and are there any additional considerations (in North Rhine-Westphalia)?
- At least 15 degrees when roof windows are to be installed (according to Velux);
- At least 22 degrees to ensure rain tightness (according to dach.de) ("classic flat roof tile");
- 30 to 45 degrees are optimal for photovoltaic panels or solar collectors (according to Thomas Königstein).
Are there significant cost differences depending on the roof pitch?
K
karl.jonas2 Mar 2022 22:20Thank you for the responses.
There is an inner district statute, which does not specify the roof pitch.
I am working with a construction supervisor (an acquaintance who has already built about a dozen houses here) and therefore have complete freedom. Am I understanding your comment correctly?: "General contractors prefer to use nail plate trusses for cost reasons, which avoids the (more expensive) open construction method (with rafters) for visual/aesthetic reasons."
Why? Wouldn’t it make more sense to raise the knee wall, if allowed (keeping the same ridge height), instead of changing the roof pitch?
The roof faces southwest, so the ridge runs southeast–northwest.
For now, I’ll take what Zubi123 wrote:
MM1506zzzz schrieb:
Is there a local development plan?
There is an inner district statute, which does not specify the roof pitch.
Pitiglianio schrieb:
a classic rafter roof or a nail plate truss roof
I am working with a construction supervisor (an acquaintance who has already built about a dozen houses here) and therefore have complete freedom. Am I understanding your comment correctly?: "General contractors prefer to use nail plate trusses for cost reasons, which avoids the (more expensive) open construction method (with rafters) for visual/aesthetic reasons."
Bauenaberwie schrieb:
If we could have gone a bit higher, we would have chosen 30
Why? Wouldn’t it make more sense to raise the knee wall, if allowed (keeping the same ridge height), instead of changing the roof pitch?
Zubi123 schrieb:
Depending on the orientation of the roof surfaces...
The roof faces southwest, so the ridge runs southeast–northwest.
For now, I’ll take what Zubi123 wrote:
Zubi123 schrieb:
There are pros and cons everywhere.
karl.jonas schrieb:
Are there significant cost differences depending on the roof pitch?The pitch has the least impact. You already mentioned a gable roof; a hip or half-hipped roof would be more expensive—especially over a non-rectangular floor plan (which, if I remember correctly, you don’t plan). You would need to look at the details more specifically. Why don’t you try contacting me through the channels you already know? Would you consider a mansard roof?https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
B
Bauenaberwie3 Mar 2022 06:45The steeper roof pitch creates more usable space in the attic. At 25 degrees, the height in the center is 1.88m (6 feet 2 inches). At 30 degrees, it should be around 2.3m (7 feet 7 inches) or so. This means you have more options for using the attic.
But then you are assuming a constant eaves height. Only then does your statement hold true. Because if you are generally allowed to build higher, @karl.jonas is right—you can create even more storage space with a lower roof pitch.
In other words, taking an extreme example: I would prefer 10 square meters at 1.88 meters (6.2 feet) rather than 1 square meter at 2.3 meters (7.5 feet), 1 square meter at 2.0 meters (6.6 feet), 1 square meter at 1.7 meters (5.6 feet), 1 square meter at 1.4 meters (4.6 feet), and so on...
In other words, taking an extreme example: I would prefer 10 square meters at 1.88 meters (6.2 feet) rather than 1 square meter at 2.3 meters (7.5 feet), 1 square meter at 2.0 meters (6.6 feet), 1 square meter at 1.7 meters (5.6 feet), 1 square meter at 1.4 meters (4.6 feet), and so on...
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Pitiglianio3 Mar 2022 08:34karl.jonas schrieb:
Do I understand your post correctly?: "General contractors prefer to use nailed trusses for cost reasons, thus avoiding the (more expensive) open construction method (with a rafter roof) for visual/aesthetic reasons."General contractors are also happy to build a traditional rafter roof for you, but in the end, it is the builder who must decide whether the extra cost is justified. And I don’t believe that an open gable is necessarily eliminated with a truss roof. I only said that from my own experience, general contractors don’t like to offer an open gable. They have their standard construction methods, and these rarely include the open gable.
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