ᐅ Moisture is seeping through the floor-to-ceiling windows in the new build.
Created on: 18 Jan 2021 10:41
H
HansHack
Hello everyone,
We are currently building our single-family house, and so far everything has gone well.
However, after installing the floor-to-ceiling windows on the ground floor, we noticed that moisture is penetrating through the masonry barrier into the interior of the house through all three windows. The ground floor windows were installed on the masonry barrier, whereas on the upper floor this is not the case. There, the windows were mounted on the concrete slab.
Inside the ground floor, the floor-to-ceiling windows were sealed with a sealing tape. On the outside, such a sealing tape has not yet been applied (although it has been used on all the other “standard” windows).
The window installer will come back to the site soon, and I plan to address this issue with them then. However, I wanted to get some opinions beforehand so I might have some arguments ready.
Thank you very much!
We are currently building our single-family house, and so far everything has gone well.
However, after installing the floor-to-ceiling windows on the ground floor, we noticed that moisture is penetrating through the masonry barrier into the interior of the house through all three windows. The ground floor windows were installed on the masonry barrier, whereas on the upper floor this is not the case. There, the windows were mounted on the concrete slab.
Inside the ground floor, the floor-to-ceiling windows were sealed with a sealing tape. On the outside, such a sealing tape has not yet been applied (although it has been used on all the other “standard” windows).
The window installer will come back to the site soon, and I plan to address this issue with them then. However, I wanted to get some opinions beforehand so I might have some arguments ready.
Thank you very much!
With us, the floor-to-ceiling windows were sealed from the outside using liquid rubber and fleece. This sealing was applied over the bitumen thick coating on the basement wall before the insulation was installed. The same procedure was followed for the front door and garage door.
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knalltüte18 Jan 2021 19:43HansHack schrieb:
Okay, thanks for the hint. I will remind the window installer about it. Or clarify whether this is even within their scope of work, or if, for example, the shell builder should apply the bitumen sealing tape or black coating. In fact, sealing the floor-to-ceiling windows as well as the doors is usually the responsibility of a roofer. However, they should definitely coordinate closely with overlapping trades (such as plasterers or bricklayers if using clinker bricks) regarding the execution of the joint details, especially around the perimeter insulation area. Floor-to-ceiling windows in particular are often not sealed properly (I bet more than 50% of the time). Try searching for "The forgotten connection."
superzapp schrieb:
In fact, sealing of floor-to-ceiling windows as well as doors is usually the responsibility of a roofer. However, they should coordinate closely with overlapping trades (plasterer or bricklayer if using facing bricks) regarding the execution of the junction details—especially in the area of the perimeter insulation. Floor-to-ceiling windows, in particular, are often not properly sealed (I bet more than 50% of the time). Just search for “The forgotten connection”. What material is generally used for sealing over the perimeter insulation? Also liquid-applied membrane? So from the window onto the bituminous thick coating and then again from the window over the insulation?
hippjoha schrieb:
For us, the floor-to-ceiling windows were sealed from the outside with liquid waterproofing and fleece. This sealing was connected to the bituminous thick coating on the basement wall, and only then was the insulation applied on top. The same applies to the front door and garage door.That is correct. And I always recommend doing it yourself. Only this way can you ensure it fits 100%. It will take you at most two afternoons.You don’t need a bituminous thick coating if you have a waterproof basement (WU Keller).
Thank you very much for all the responses so far. I took another photo from the outside yesterday. As I understand it, no sealing tape needs to be installed here by the window installer, as is the case on the inside everywhere, right? Instead, I need to create a proper waterproofing using liquid waterproofing membrane and fleece that extends a few centimeters (inches) over the corners. I basically have no problem doing this myself if the window installer or roofer declines... What’s important to me is that it is properly sealed in the end, as we obviously don’t want any moisture inside the house that might only become noticeable after years.
HansHack schrieb:
Thanks in advance for all the previous answers. Yesterday, I took another picture of the outside. As I understand it, the window installer no longer needs to fit sealing tape here, unlike on the inside where it is applied everywhere, right? Instead, I need to create a proper seal with liquid waterproofing and fleece that extends a few centimeters over the corners. I’m generally fine doing this myself if the window installer or roofer declines... My main concern is that it is properly sealed in the end, since of course we don’t want any moisture inside the house that might only show up after years. Isn’t this not the window installer’s responsibility? Mine only pointed it out to me... The roofer has to or can do it.
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