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Handwerk_8214 Sep 2025 19:49Hello everyone,
I have mostly been reading quietly until now, but I have a question:
We are renovating an old house. I have finished the insulation, installed the roofing vapor control layer, smoothed some areas with mortar to create an even surface for the membrane, applied primer, and then applied a bead of sealant to ensure the membrane is airtight. When the electrician chiseled into the wall, the mortar cracked, and the vapor control layer became loose and is no longer airtight.
How should I fix this issue? Should I reapply mortar behind it and press in new sealant (Vario DoubleFit), or just apply sealant properly? What would be the best approach?
Thanks in advance!
I have mostly been reading quietly until now, but I have a question:
We are renovating an old house. I have finished the insulation, installed the roofing vapor control layer, smoothed some areas with mortar to create an even surface for the membrane, applied primer, and then applied a bead of sealant to ensure the membrane is airtight. When the electrician chiseled into the wall, the mortar cracked, and the vapor control layer became loose and is no longer airtight.
How should I fix this issue? Should I reapply mortar behind it and press in new sealant (Vario DoubleFit), or just apply sealant properly? What would be the best approach?
Thanks in advance!
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