ᐅ Adding an exterior windowsill after installing external wall insulation (EWI)
Created on: 10 Jan 2020 18:23
D
denz.
Good evening,
We have a bay window that extends 1.5m (5 feet) outward and has a narrow patio door on one side. This door is only opened for cleaning or ventilation, not for going outside.
There was originally supposed to be a windowsill here. For all the other windows (which are not floor-to-ceiling), we have aluminum windowsills.
Is it possible to install a windowsill here afterwards? For the others, these actually extend slightly into the plaster or the external thermal insulation composite system (ETICS). That’s difficult to do here.
The window faces north and is relatively sheltered since the house wall is directly to the left. So this window will not be exposed to much rain.
The bay is single-story, while the wall on the left side extends up two floors.
We have a bay window that extends 1.5m (5 feet) outward and has a narrow patio door on one side. This door is only opened for cleaning or ventilation, not for going outside.
There was originally supposed to be a windowsill here. For all the other windows (which are not floor-to-ceiling), we have aluminum windowsills.
Is it possible to install a windowsill here afterwards? For the others, these actually extend slightly into the plaster or the external thermal insulation composite system (ETICS). That’s difficult to do here.
The window faces north and is relatively sheltered since the house wall is directly to the left. So this window will not be exposed to much rain.
The bay is single-story, while the wall on the left side extends up two floors.
You mean because there would be about one centimeter (0.4 inches) of metal sticking out on each side? Hmm. Well, what would be the alternative?
Good question. I’d have to check again, but it’s probably aluminum window sills at the windows, basically. That’s it. The offer might specify a quantity. I can take a look at that tonight.
But honestly, that doesn’t really help me much. The general contractor is willing to do it, but of course, he doesn’t want to tear open the facade for it, and I don’t really want that either.
Good question. I’d have to check again, but it’s probably aluminum window sills at the windows, basically. That’s it. The offer might specify a quantity. I can take a look at that tonight.
But honestly, that doesn’t really help me much. The general contractor is willing to do it, but of course, he doesn’t want to tear open the facade for it, and I don’t really want that either.
denz. schrieb:
You mean because there would be about one centimeter (0.4 inches) of metal on both the left and right sides that “stands out”? Hmm. Well, what would be the alternative?
Good question. I’d need to check again, but most likely it means aluminum window sills at the windows. That’s it. There might be a quantity listed in the offer. I can check this evening.
But that doesn’t really help me much. The general contractor wants to do it, but of course he doesn’t want to open up the facade, and I don’t really want that either. If it says that there should be a window sill there, then he has to solve that properly. And that probably only works with plastering.
You won’t be able to cut the aluminum so precisely that it fits all around with an even gap where you just have to press in some silicone.
Otherwise, just let him do it and take a look at the result.