ᐅ Roof windows with double or triple glazing

Hello everyone,

We are currently reviewing the offer from our carpenter and noticed that the roof windows were only quoted as double-glazed. When I ask around, it seems that everyone is only using double glazing?

So far, I have found out that triple-glazed windows generally don’t have condensation issues. However, in winter, the window also tends not to stay clear of snow.

From an energy perspective, I’m unsure whether it’s worth paying the 300 euros (about $320) extra per window, as otherwise, they might become the weakest part of the house. We only have two windows, so it’s a relatively small extra cost—but it does add up.

What type of glazing have you installed and why?

Thanks,
Andreas

Our children sleep under roof windows that are only double-glazed. In hindsight, this was clearly the wrong place to cut costs. It’s a similar situation with the toilet located under the roof window.

The triple-glazed roof windows are somehow crazy.
We have six very large Velux roof windows and chose the double glazing (Uw value 1.0).
The triple-glazed windows with a Uw value of 0.8 would have cost €3000 more in total – that equals the heating costs over six years. The windows wouldn’t pay off even after 200 years.
We also placed great importance on good insulation (windows, walls, roof...), but there are limits to what makes sense.

One thing is the calculation, another is the unpleasant draft sensation that is being reduced.

The draft is not caused by double or triple glazing, but by the continuous seal around the window, which simply does not achieve 100% airtightness...

I fully agree with Lumpi...the additional cost is not justified.

Oh dear... in our "kfw70-almost-passing-kfw55 house," we only have double glazing everywhere, including the Velux window.
There are no drafts anywhere, and we’re fine, even able to look out the windows during winter.

Clearly, there are items where you can save on extra costs. Choose double glazing.

Brief regards