Joachim73
2015-11-22 18:38:38
- #1
Hello!
We have the following problem and need help: One year ago, we had the pitched roof of our house insulated by a professional roofing company. Now, condensation has repeatedly formed on the vapor barrier. Since nothing changed, not even when we altered the ventilation behavior, I cut open the vapor barrier at one point as a last resort: A cold draft came towards me. Some gaps were present between the insulation boards, while in other places the insulation boards were compressed between the rafters (probably cut too large). An underlay membrane, although listed on the invoice (and paid by me), was not present. Through the gaps, you could see the tiles.
Now the question is: What should be done? Although I am an amateur, I suspect that gaps and compressions in the insulation boards are not okay. Does this need to be remedied? Or is it sufficient to spray insulating foam in between and close the vapor barrier again?
And: How important is the underlay membrane? That is, is it enough to demand the calculated amount back from the roofing company since it was not installed? Or should something structural be done here?
Drywall and painting work are now almost finished everywhere, and the rooms are inhabited. If the underlay membrane is necessary, could it also be installed from the roof side? After all, there are 74 sqm of roof area.
I am puzzled by the whole matter, as the master roofing company that also carried out the insulation work is considered absolutely reputable.
Thank you all in advance for the answers.
We have the following problem and need help: One year ago, we had the pitched roof of our house insulated by a professional roofing company. Now, condensation has repeatedly formed on the vapor barrier. Since nothing changed, not even when we altered the ventilation behavior, I cut open the vapor barrier at one point as a last resort: A cold draft came towards me. Some gaps were present between the insulation boards, while in other places the insulation boards were compressed between the rafters (probably cut too large). An underlay membrane, although listed on the invoice (and paid by me), was not present. Through the gaps, you could see the tiles.
Now the question is: What should be done? Although I am an amateur, I suspect that gaps and compressions in the insulation boards are not okay. Does this need to be remedied? Or is it sufficient to spray insulating foam in between and close the vapor barrier again?
And: How important is the underlay membrane? That is, is it enough to demand the calculated amount back from the roofing company since it was not installed? Or should something structural be done here?
Drywall and painting work are now almost finished everywhere, and the rooms are inhabited. If the underlay membrane is necessary, could it also be installed from the roof side? After all, there are 74 sqm of roof area.
I am puzzled by the whole matter, as the master roofing company that also carried out the insulation work is considered absolutely reputable.
Thank you all in advance for the answers.