Hello everyone,
I need your help:
We are currently building a single-family house (KfW70 standard, 160 m² (1,722 sq ft), no basement) and did not include roller shutters in the contract with our general contractor. Originally, we planned to install exterior roller shutters mounted in the window recess beneath the facing bricks. The more I see this solution on other houses, the less attractive I find it. Therefore, I am currently looking for possible alternatives.
The most appealing option would, of course, be electric built-in or external roller shutters. However, I keep hearing that these always cause thermal bridges, which is obviously undesirable (if thermal bridges really are an issue with these). In our new development, I have recently noticed that about 90% of the houses have these types of roller shutters installed.
So, what is the reality? Can external roller shutters be installed without major problems? Or should they be avoided and alternatives considered?
What have you installed? If you have external roller shutters, how did you manage it? Additional insulation, insulated shutter boxes?
For your information:
The wall structure is as follows: 17.5 cm (7 inches) aerated concrete, 16 cm (6 inches) insulation, 4 cm (1.5 inches) air gap, 11.5 cm (4.5 inches) facing brick.
The current stage of construction: foundation slab poured today.
Thank you in advance!
I need your help:
We are currently building a single-family house (KfW70 standard, 160 m² (1,722 sq ft), no basement) and did not include roller shutters in the contract with our general contractor. Originally, we planned to install exterior roller shutters mounted in the window recess beneath the facing bricks. The more I see this solution on other houses, the less attractive I find it. Therefore, I am currently looking for possible alternatives.
The most appealing option would, of course, be electric built-in or external roller shutters. However, I keep hearing that these always cause thermal bridges, which is obviously undesirable (if thermal bridges really are an issue with these). In our new development, I have recently noticed that about 90% of the houses have these types of roller shutters installed.
So, what is the reality? Can external roller shutters be installed without major problems? Or should they be avoided and alternatives considered?
What have you installed? If you have external roller shutters, how did you manage it? Additional insulation, insulated shutter boxes?
For your information:
The wall structure is as follows: 17.5 cm (7 inches) aerated concrete, 16 cm (6 inches) insulation, 4 cm (1.5 inches) air gap, 11.5 cm (4.5 inches) facing brick.
The current stage of construction: foundation slab poured today.
Thank you in advance!
BeHaElJa schrieb:
Keep in mind that this will reduce your lintel height—or rather, part of the window opening will then be occupied by the roller shutter (you don’t want to have planned for a height of 2.10m (6 ft 11 in) and then end up hitting your head).That’s why this decision is extremely urgent. Masonry work will start on Monday, and I want to finalize this matter by Monday or Tuesday so that the lintel heights can still be adjusted. The window sizes planned so far are meant to be implemented as is, without being made smaller.Mycraft schrieb:
You just have to decide for yourself whether you can live with the modest appearance or the thermal bridges.We have already decided that the mounted roller shutter box is the better—and for us more visually appealing—option. Until now, we assumed that the resulting thermal bridges would be problematic and therefore only surface-mounted roller shutters were an option. Since this seems to be incorrect, I hope we can still make all the necessary arrangements in time.Just to clarify:
The roller shutter would be installed directly below the lintel, right? If you look at the cross-section of the wall with aerated concrete—insulation—air gap—brick veneer, the roller shutter box would be positioned vertically below the aerated concrete (or the lintel), so that the insulation can be installed as usual? In that case, the thermal bridge would indeed be negligible.
Or am I mistaken?
Mycraft schrieb:
no, you are thinking in the right direction... Apparently not. I just spoke with our general contractor, and according to our site manager, the windows are installed in the insulation layer, so the roller shutter box would indeed create a thermal bridge, which could potentially cause us to lose our KFW standard. This would require compensatory measures to be taken.
Any comments?!
S
Sebastian7911 Apr 2016 08:57Yes, nonsense – at least someone is not thinking globally here.
The site manager is not the one calculating the thermal insulation certificate – how does he come to such a general conclusion?
These are MINIMAL thermal bridges, and if that really endangers the KFW funding, then everything is being done on very thin ice. But I still doubt that...
The site manager is not the one calculating the thermal insulation certificate – how does he come to such a general conclusion?
These are MINIMAL thermal bridges, and if that really endangers the KFW funding, then everything is being done on very thin ice. But I still doubt that...
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