The time has come to fix the leaking balcony... The balcony is "built-in" under the roof and also serves as a roof to the bedroom on the floor below.
Currently, the ceiling in the bedroom below the balcony is insulated internally with 75 mm of styrofoam + 45 mm of air gap before gypsum boards (13 mm). The primary goal now is to replace the balcony's waterproofing layer and create an effective construction for water drainage, something that failed miserably when the house was built in 1977... There are clear indications that water is seeping into the exterior wall in the bedroom, and I can now confirm after a few days with the drilling machine that it comes from the balcony.
It has a concrete joist, and after some drilling, I noticed that the balcony was cast with 70 mm of concrete on top of roofing felt. I have now removed the cast slab and am dealing with the old roofing felt and cold asphalt...
Since I have now determined that I have 70 mm "depth" on the balcony, I will be able to install external insulation and then remove it in the bedroom, thus raising the ceiling by about 13 cm!
So, taking the slope into account, I have about 40 mm available for insulation... With polyurethane-based insulation, that should be more than enough. The question is how to proceed to make it work...
The balcony will then be finished with tiles as a surface layer.
How do I proceed to achieve insulation+waterproofing layer+slope?
Currently, the ceiling in the bedroom below the balcony is insulated internally with 75 mm of styrofoam + 45 mm of air gap before gypsum boards (13 mm). The primary goal now is to replace the balcony's waterproofing layer and create an effective construction for water drainage, something that failed miserably when the house was built in 1977... There are clear indications that water is seeping into the exterior wall in the bedroom, and I can now confirm after a few days with the drilling machine that it comes from the balcony.
It has a concrete joist, and after some drilling, I noticed that the balcony was cast with 70 mm of concrete on top of roofing felt. I have now removed the cast slab and am dealing with the old roofing felt and cold asphalt...
Since I have now determined that I have 70 mm "depth" on the balcony, I will be able to install external insulation and then remove it in the bedroom, thus raising the ceiling by about 13 cm!
So, taking the slope into account, I have about 40 mm available for insulation... With polyurethane-based insulation, that should be more than enough. The question is how to proceed to make it work...
The balcony will then be finished with tiles as a surface layer.
How do I proceed to achieve insulation+waterproofing layer+slope?