ᐅ 35-degree pitched roof with concrete tiles

Hello everyone,

Due to our elevation, we experience significant below-freezing temperatures in midwinter, horizontal snowfall from the valley side, and, in addition, plenty of sunshine in summer. We are planning a gable roof with a 35-degree pitch, and the architect has suggested making the roof out of concrete (either precast elements or cast in place; currently, he prefers the first option). One advantage of this is that the house would not heat up as much. We are also planning to have a black exterior, and the roofing will be done with bitumen.

Does anyone have experience with concrete roofs? If so, could you share some insights (advantages, disadvantages, costs, etc.)? At the moment, for a 150m² (1,615 sq ft) roof area, additional costs of about 15,000 euros are expected, all included.

Best regards
Karlstraße

So, when I’m in mountainous areas in Germany and Austria, I don’t see concrete roofs there... I think other roofing methods have proven to be more effective.

Karlstraße schrieb:
Currently, with a roof area of 150sqm (1,615 sq ft), additional costs amount to about 15,000 euros for everything included.

And you're seriously considering that?! Even an air conditioner would probably be cheaper than going for such a special feature.
Or instead, green the roof— that works too.

You are building a black house in the Alps and want to prevent it from heating up too much?

How about an alternative with a Ytong solid roof? That would be my choice if I were planning again.

Knallkörper schrieb:
How about an alternative with a Ytong solid roof? That would be my choice if I were still in the planning stage.

Also an alternative, it looks interesting in the pictures online. Let’s see, otherwise you’re probably right and it will stay with the rafter roof. I can imagine that a concrete roof is better for the indoor climate, especially since the house is open up to under the roof. But whether the difference justifies 15,000 euros...