ᐅ Cold Roof – Are Roof Windows Necessary for Cross Ventilation?
Created on: 9 Feb 2016 21:47
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Julchen_76
Hello everyone,
We are in the final planning phase of our house and are now wondering if, for our planned cold roof, two small roof windows for cross-ventilation are necessary.
Our client advisor says yes, but the general contractor considers them unnecessary.
How did you handle this in your projects?
Good luck, Julia
We are in the final planning phase of our house and are now wondering if, for our planned cold roof, two small roof windows for cross-ventilation are necessary.
Our client advisor says yes, but the general contractor considers them unnecessary.
How did you handle this in your projects?
Good luck, Julia
So what do we have then? Unfortunately, I didn’t quite understand what exactly defines a warm roof and a cold roof.
In our case, the insulated layer is our top floor ceiling (with 2 full stories). In the attic itself, there is no insulation between the beams or anywhere along the roof slopes. We have vent tiles in the gable and a ventilation gap between the roof and the masonry. So, it is a ventilated, uninsulated attic. I had always referred to this as a cold roof. Is that correct?
In our case, the insulated layer is our top floor ceiling (with 2 full stories). In the attic itself, there is no insulation between the beams or anywhere along the roof slopes. We have vent tiles in the gable and a ventilation gap between the roof and the masonry. So, it is a ventilated, uninsulated attic. I had always referred to this as a cold roof. Is that correct?
S
Sebastian7910 Feb 2016 15:12No, warm roof and properly executed.
WildThing schrieb:
So what do we have then? I didn’t quite understand what exactly defines a warm roof and a cold roof?
For us, the insulated layer is our top floor ceiling (in a two-story building). In the attic itself, there is no insulation between the joists or anywhere on the pitched roof surfaces. We have ventilation tiles in the gable and an air gap between the roof and the masonry. So, it’s a ventilated, uninsulated attic. I had always called this a cold roof. Is that correct?For us, the top floor ceiling is also insulated, and both the eaves and the ridge have ventilation grills.Sebastian79 schrieb:
No, it’s a warm roof and properly executed.Okay, then it seems we have a warm roof as well.A cold roof would be when, for example, insulation is placed between the rafters, and air circulation only occurs above them. So basically when the roof surface itself is colder than the roof structure?!
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Sebastian7910 Feb 2016 15:30This is how I understood it.
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Bieber081510 Feb 2016 17:00Ah, learned something new, but still have some questions. Wikipedia explains cold roofs and warm roofs as insulated roofs, as far as I understand. Now, many houses have an uninsulated roof; the insulation layer is the ceiling of the top floor. Can these terms cold roof and warm roof even be applied here? Can someone explain?
Is a *ventilated* uninsulated attic then more of a cold roof? Unventilated would be a warm roof?
Jochen104 schrieb:
In our case, the top floor ceiling is insulated and the eaves and ridge have ventilation grills.No, that’s a warm roof and properly constructed.
Is a *ventilated* uninsulated attic then more of a cold roof? Unventilated would be a warm roof?
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