Hello,
I have the following question: We have a house with a balcony that is almost integrated into the roof. The ceiling slab is made of concrete, and the balcony, which is recessed or rather built into this height externally, has a wooden structure underneath. It basically sits at ceiling level but extends outward at the height of the roof overhang. The balcony extends as far as the roof does. (The start of the balcony equals the end of the roof).
We do not know what the roof structure underneath looks like. We only know that the balcony floor was sealed with roofing felt, and at first, water always accumulated there because the felt was very wrinkled. Therefore, a slope was created using screed, which was poured onto the felt, and then a rubber-like waterproofing membrane from PCI was applied on top.
In the meantime, cracks have formed in the screed layer because the wooden structure underneath naturally moves. Some cement is also efflorescing from the cracks.
Is the originally recommended construction actually appropriate?
How is something like this built correctly?
Apart from a complete metal tray with a slope, is there no alternative to repeatedly patching roofing felt?
Is there not something like tile-shaped roof shingles that interlock and create a drainage channel underneath?
I would greatly appreciate any advice, as we are not really sure whether the whole setup is good or problematic.
I have the following question: We have a house with a balcony that is almost integrated into the roof. The ceiling slab is made of concrete, and the balcony, which is recessed or rather built into this height externally, has a wooden structure underneath. It basically sits at ceiling level but extends outward at the height of the roof overhang. The balcony extends as far as the roof does. (The start of the balcony equals the end of the roof).
We do not know what the roof structure underneath looks like. We only know that the balcony floor was sealed with roofing felt, and at first, water always accumulated there because the felt was very wrinkled. Therefore, a slope was created using screed, which was poured onto the felt, and then a rubber-like waterproofing membrane from PCI was applied on top.
In the meantime, cracks have formed in the screed layer because the wooden structure underneath naturally moves. Some cement is also efflorescing from the cracks.
Is the originally recommended construction actually appropriate?
How is something like this built correctly?
Apart from a complete metal tray with a slope, is there no alternative to repeatedly patching roofing felt?
Is there not something like tile-shaped roof shingles that interlock and create a drainage channel underneath?
I would greatly appreciate any advice, as we are not really sure whether the whole setup is good or problematic.
Hello "Snakey".
Whether the installation was done correctly can only be assessed by me (as an expert) if I see all the system components as well as the installation method. There are too many possibilities, and even with an apparently proper installation, critical errors can occur in areas that are not visible to technical laypersons (and should not be expected to be).
To avoid sounding like a "know-it-all," I prefer not to speculate on the WHY.
Just this much: based on the information you have provided here, cracks in the screed do not necessarily have to occur.
Best regards, KlaRa
Whether the installation was done correctly can only be assessed by me (as an expert) if I see all the system components as well as the installation method. There are too many possibilities, and even with an apparently proper installation, critical errors can occur in areas that are not visible to technical laypersons (and should not be expected to be).
To avoid sounding like a "know-it-all," I prefer not to speculate on the WHY.
Just this much: based on the information you have provided here, cracks in the screed do not necessarily have to occur.
Best regards, KlaRa
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