ᐅ Facade Insulation: Implications for Windows, Roller Shutter Boxes, and Extensions
Created on: 27 Feb 2024 18:16
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MarkFalk
Hello,
for our conventionally built house from 1992, I am considering adding exterior wall insulation including new windows. I’m not clear about the details and would like to ask:
As far as I understand, with exterior wall insulation, the new windows are installed further outward, flush with the old plaster. Regarding the roller shutters, this means not only that the old guides need to be removed and reinstalled on/in the insulation. Is this even possible? And what about the roller shutter boxes? Installing new roller shutter boxes in front of the old ones is not an option because the insulation is only about 15cm (6 inches) thick. But removing the old roller shutter boxes is also not possible or would require a huge effort and create a lot of mess. So how is this problem usually solved?
What about canopies and similar structures? We have massive brick-covered canopies over the entrance and terrace. The supporting structure on the house side consists of large beams screwed to the house wall (and at the front end, of course, vertical supports). Does all of this have to be dismantled and reinstalled? Is it even possible to mount such structures on the insulation?
for our conventionally built house from 1992, I am considering adding exterior wall insulation including new windows. I’m not clear about the details and would like to ask:
As far as I understand, with exterior wall insulation, the new windows are installed further outward, flush with the old plaster. Regarding the roller shutters, this means not only that the old guides need to be removed and reinstalled on/in the insulation. Is this even possible? And what about the roller shutter boxes? Installing new roller shutter boxes in front of the old ones is not an option because the insulation is only about 15cm (6 inches) thick. But removing the old roller shutter boxes is also not possible or would require a huge effort and create a lot of mess. So how is this problem usually solved?
What about canopies and similar structures? We have massive brick-covered canopies over the entrance and terrace. The supporting structure on the house side consists of large beams screwed to the house wall (and at the front end, of course, vertical supports). Does all of this have to be dismantled and reinstalled? Is it even possible to mount such structures on the insulation?
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nordanney29 Feb 2024 14:37MarkFalk schrieb:
Do you perhaps know a website where all of this is explained in detail?
You mean that the reveal of the old window opening, that is the old masonry, would be insulated over? But that would then have to be done with the same thickness, for example 15cm (6 inches) on each side. Then the windows would have to be smaller – or rather the window opening enlarged, otherwise the roller shutters wouldn’t fit anymore. That is a completely normal procedure, even in new builds the reveals are insulated. Attached is the first image that comes up after two seconds of Googling. The reveal is insulated on both the inside and outside, or the frame is insulated over (or the guide rail of the roller shutter). The new windowsill is adapted accordingly.
And in reality, the outside looks like this (as it does at my home):
There are even special insulation boards for the reveal. Normally, two to three cm (around 1 inch) of insulation is used. That is entirely sufficient. State of the art.
MarkFalk schrieb:
You mean internal insulation? That would be my preference, since I could do it myself, but it would take up too much interior space. Or do you mean removing and reinstalling the windows from the inside? Which doesn’t change the issue with the external insulation that you described. Internal insulation of the reveal. See the image above. As I said, external insulation is not an issue.
Complete internal insulation is mostly a bad idea and often leads to mold. For a layperson it might even be more difficult than doing an external insulation system (ETICS) yourself.
MarkFalk schrieb:
In new construction, windows are usually installed "normally" far to the outside from the start.
But okay, it is certainly also a question of the window width. Where it makes sense. For monolithic construction, for example, not all the way to the outside, because then you don’t have a windowsill anymore. For ETICS (External Thermal Insulation Composite Systems), the window is installed at the outer side or at the start of the insulation layer.
MarkFalk schrieb:
That looks "normal". ;-) That’s what I’m saying... The windows are about 1.5cm (0.6 inches) smaller on each side than the old windows. Setting them further forward would have involved a major effort, since they sit on the masonry on the outside and then there’s the facing brick, which also sits in front of the roller shutter box. As shown in the picture: lintel above the roller shutter box, facing brick outside in front of the roller shutter box. The new windows were ordered with integrated roller shutters, identical to the original ones, and insulated as described above.
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WilderSueden29 Feb 2024 16:31MarkFalk schrieb:
In new construction, windows are usually installed "normally" set far outwards from the start. Ours are positioned roughly in the middle. This leaves space on the outside for an external roller shutter box, and on the inside, there is additional insulation behind the frame. Everything is plastered over, so nothing is visible.
MarkFalk schrieb:
That’s why I’m asking – since it seems to affect about every other person. What I meant to say is… talk to a specialist about it. The energy consultant knows these cases and can advise what the most effective solution is for your exact construction and renovation type. You usually need them anyway for funding purposes. And the window installer will definitely be familiar with the issue.
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alterego13415 Mar 2024 02:04Year of construction 1992, is external insulation really somewhat useful for you? Serious question, it varies from case to case.
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