Hello,
I hope to get some help here. We are renovating a villa built in the 50s-60s with a frame wall construction. Viewed from the inside, the wall looks like this:
tretetex, råspont 17x95, stud approximately 55x60, wind barrier, asfabord, wood paneling. Total insulation thickness about: 70mm
This is how the wall will look when it's finished:
Drywall, OSB board, råspont 17x95, will PU-glue and screw on a 45x70, stud 45x45 crosswise, asfabord, battens 28x45, cladding board, total insulation thickness about: 185mm
In the ceiling, there is tretex painted several times which I plan to keep and screw the drywall into this as a barrier.
I will seal with acrylic sealant at each corner where the drywall panels meet and at the wall/floor and wall/ceiling junctions.
There is a fresh air vent in every room.
Now to my pondering regarding diffusion plastic... I am not quite sure which side I take on this. Currently, there is no plastic in the walls or ceiling. Can I, if I have controlled ventilation, skip the plastic??
Does air pass through wallpaper+painted drywall+OSB+råspont, and if so, wouldn't OSB+råspont function like a "lung"?
Anyone with the same thoughts or done something similar... Grateful for advice...
Kind regards, Yllom
I hope to get some help here. We are renovating a villa built in the 50s-60s with a frame wall construction. Viewed from the inside, the wall looks like this:
tretetex, råspont 17x95, stud approximately 55x60, wind barrier, asfabord, wood paneling. Total insulation thickness about: 70mm
This is how the wall will look when it's finished:
Drywall, OSB board, råspont 17x95, will PU-glue and screw on a 45x70, stud 45x45 crosswise, asfabord, battens 28x45, cladding board, total insulation thickness about: 185mm
In the ceiling, there is tretex painted several times which I plan to keep and screw the drywall into this as a barrier.
I will seal with acrylic sealant at each corner where the drywall panels meet and at the wall/floor and wall/ceiling junctions.
There is a fresh air vent in every room.
Now to my pondering regarding diffusion plastic... I am not quite sure which side I take on this. Currently, there is no plastic in the walls or ceiling. Can I, if I have controlled ventilation, skip the plastic??
Does air pass through wallpaper+painted drywall+OSB+råspont, and if so, wouldn't OSB+råspont function like a "lung"?
Anyone with the same thoughts or done something similar... Grateful for advice...
Kind regards, Yllom
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My first thought is..... The house was built a long time ago, not much use of water in the house and a ventilation system adapted for that lifestyle...
Modern houses are more insulated, (which you should do) the moisture movement then becomes more between the walls, roof, and outdoor air...
So, plastic both the roof and walls between both layers of insulation... It's important that both the roof and walls are plasticized,,, otherwise, don't bother... If you don't do both, the moisture will move to where it's not plasticized, which obviously is not a good idea...
Then you write that the drywall should be screwed into the tretex..... Hopefully, you mean into the beams that hold up the tretex.. otherwise you'll have big problems getting the boards to stay up..
That was my suggestion....
Modern houses are more insulated, (which you should do) the moisture movement then becomes more between the walls, roof, and outdoor air...
So, plastic both the roof and walls between both layers of insulation... It's important that both the roof and walls are plasticized,,, otherwise, don't bother... If you don't do both, the moisture will move to where it's not plasticized, which obviously is not a good idea...
Then you write that the drywall should be screwed into the tretex..... Hopefully, you mean into the beams that hold up the tretex.. otherwise you'll have big problems getting the boards to stay up..
That was my suggestion....
Hello hello,
No, the plaster should be screwed into the OSB board + the tongue and groove board behind, the tretex should be removed. Kind of like you mentioned, my thought is that we won't be able to put plastic everywhere and get it really tight, which is why it doesn't feel right considering that I'm concentrating the air in a couple of places instead. I've been thinking about installing a Spirex (I think that's what it's called) on the roof so that there's almost always ventilation out, what do you think about this? In the bathroom + drying room, we have a moisture-controlled fan,
// Yllom
No, the plaster should be screwed into the OSB board + the tongue and groove board behind, the tretex should be removed. Kind of like you mentioned, my thought is that we won't be able to put plastic everywhere and get it really tight, which is why it doesn't feel right considering that I'm concentrating the air in a couple of places instead. I've been thinking about installing a Spirex (I think that's what it's called) on the roof so that there's almost always ventilation out, what do you think about this? In the bathroom + drying room, we have a moisture-controlled fan,
// Yllom