Good morning,
Yesterday the windows were delivered. The window installer noticed that one window is 10cm (4 inches) too narrow. He said it was his mistake and offered to order a new one (which will probably take another 14 days or more) or install this one. On the left side, he wants to place Styrodur insulation, which has very good insulating properties.
I basically do not want to wait that long again, since all the following trades (electrical, gas, plumbing) can only start once ALL windows and doors are installed.
Is using Styrodur in this way safe, or could it cause thermal bridges and therefore mold? After all, it is also used to insulate various concrete components.
The masonry is 36.5cm (14 inches) Poroton bricks. This is a new build, and the roof structure has just been completed.
Thank you
Yesterday the windows were delivered. The window installer noticed that one window is 10cm (4 inches) too narrow. He said it was his mistake and offered to order a new one (which will probably take another 14 days or more) or install this one. On the left side, he wants to place Styrodur insulation, which has very good insulating properties.
I basically do not want to wait that long again, since all the following trades (electrical, gas, plumbing) can only start once ALL windows and doors are installed.
Is using Styrodur in this way safe, or could it cause thermal bridges and therefore mold? After all, it is also used to insulate various concrete components.
The masonry is 36.5cm (14 inches) Poroton bricks. This is a new build, and the roof structure has just been completed.
Thank you
After extensive research on Google, I found the following:
It is said: "...using Styrodur on the inside is risky if it is not fully and tightly glued without any gaps. It is essentially vapor-tight and not capillary-active. Moisture condensing between the wall and the Styrodur can lead to mold growth.
A thin calcium silicate board with the appropriate system adhesive would be better. Apart from that, insulation around the reveal (window or door reveals) is recommended."
In my view, the idea of using Styrodur is dangerous because moisture can accumulate between the Styrodur and the masonry, leading to mold.
So the question is whether it might be better to build up the 10cm (4 inches) with Poroton bricks. Then you would have a single wall, and from my perspective, moisture formation would be less likely since there would no longer be a warm/cold gradient?
It is said: "...using Styrodur on the inside is risky if it is not fully and tightly glued without any gaps. It is essentially vapor-tight and not capillary-active. Moisture condensing between the wall and the Styrodur can lead to mold growth.
A thin calcium silicate board with the appropriate system adhesive would be better. Apart from that, insulation around the reveal (window or door reveals) is recommended."
In my view, the idea of using Styrodur is dangerous because moisture can accumulate between the Styrodur and the masonry, leading to mold.
So the question is whether it might be better to build up the 10cm (4 inches) with Poroton bricks. Then you would have a single wall, and from my perspective, moisture formation would be less likely since there would no longer be a warm/cold gradient?
B
Bieber081510 Aug 2017 06:34We received new windows around 1991, and one of them was too small. A board was used as a temporary solution until the proper window was delivered and installed.
Two of our windows were damaged and therefore not installed. This process took several weeks. During that time, OSB boards were installed instead. However, the other trades were still protected.
Considering the entire time you live in the house, two weeks is really nothing. Do you really want to make compromises because of that?
Considering the entire time you live in the house, two weeks is really nothing. Do you really want to make compromises because of that?
W
winnetou7810 Aug 2017 06:58There are aerated concrete panels exactly 5cm (2 inches) thick, with a tongue on one side and a groove on the other, ready to use.
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