Hello all professionals!
I am helping my sister with renovating her house from the 70s. Basement, attic with a siporex slab on the raised floor that we've replaced with foam plastic, underfloor heating, self-leveling compound.
The important part is the exterior walls. The construction (from outside) is: brick facade, air gap, asphalt board, insulation, Ac350, Treetex boards (fiberboard).
As I see it, none of the above provide any vapor barrier function. I suggested removing the Treetex, Ac350 and installing a proper vapor barrier but they don't like that (too much work). Can a vapor barrier now be added on the existing without tearing anything down and then gypsum board?
Some alternatives I've considered:
* Skip the vapor barrier altogether?
* Frame 45, additional 45 insulation, vapor barrier, and then gypsum board (enclose the Ac350 + Treetex)!?
* Vapor barrier gypsum board (preferably not as it will be tricky with the electrical wiring)
* Tear out Treetex + Ac350 and then replace with (option 2)?
Can you advise me on how I can proceed here?
Reading up, it seems the Ac350 (if that's what it is) is supposed to breathe, the Treetex also breathes?
The house will have ventilation (exhaust but maybe FTX).
I am helping my sister with renovating her house from the 70s. Basement, attic with a siporex slab on the raised floor that we've replaced with foam plastic, underfloor heating, self-leveling compound.
The important part is the exterior walls. The construction (from outside) is: brick facade, air gap, asphalt board, insulation, Ac350, Treetex boards (fiberboard).
As I see it, none of the above provide any vapor barrier function. I suggested removing the Treetex, Ac350 and installing a proper vapor barrier but they don't like that (too much work). Can a vapor barrier now be added on the existing without tearing anything down and then gypsum board?
Some alternatives I've considered:
* Skip the vapor barrier altogether?
* Frame 45, additional 45 insulation, vapor barrier, and then gypsum board (enclose the Ac350 + Treetex)!?
* Vapor barrier gypsum board (preferably not as it will be tricky with the electrical wiring)
* Tear out Treetex + Ac350 and then replace with (option 2)?
Can you advise me on how I can proceed here?
Reading up, it seems the Ac350 (if that's what it is) is supposed to breathe, the Treetex also breathes?
The house will have ventilation (exhaust but maybe FTX).
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None of your options will be wrong, but my thought is, you have a wall that has worked for about 50 years, why do something other than what has been done?
If it's for insulation purposes and you want a vapor barrier, install it first and then the 45 rule on top of that.
And if vapor tightness is to be added, maybe choose a vapor brake that can breathe a little, as it is difficult to get completely tight with a vapor barrier in an old house in connection to the roof and interior walls.
If it's for insulation purposes and you want a vapor barrier, install it first and then the 45 rule on top of that.
And if vapor tightness is to be added, maybe choose a vapor brake that can breathe a little, as it is difficult to get completely tight with a vapor barrier in an old house in connection to the roof and interior walls.