HI i just remodeled a bathroom in a 100+ year old house. There was the siding and empty wall cavity and then there was sheetrock. I added tyvek to the back of the siding and insulation and than new mold resistant sheetrock,
What are common techniques to waterproof a wall from the inside. I would like to get better insight on the matter.
How can i waterproof, vapor proof, keep my insulation from getting wet and all that good stuff without taking the exterior siding off.
Thanks for the tips
Replies
Well, obviously you can "vapor proof" from the inside by installing a vapor barrier behind the interior wall covering. "Water proofing" is going to be a problem, though, since the studs are in the way, so any water barrier is going to be interrupted every 16 inches, plus there's no place to drain the water that collects. You can achieve something, but far from perfect.
It sounds like all you would achieve in this project would be to create a vapor barrier on a very small section of the wall area--just the outside wall of the bathroom.
Even if you installed a curtain of polyethelene with a high perm rating, there would still likely be air leakage into the wall assembly from other parts of adjoining framing, air which will also carry moisture.
If you're mainly concerned about humid bathroom air finding its way into the wall assembly, I think a more effective approach will be to install a good, quiet bath exhaust fan of about 60 CFM capacity with a short, unobstructed duct to the outside.
Tear out all that you have done and have polyurethene foam sprayed to the sheathing/siding from the inside.
Other than that, you are attempting the impossible, tantamont to pushing rain UP the roof!
Picture this, it is raining and you want to take a walk without getting wet, so you put lastic bags on your skin before dressing.
Sound rediculous?
That's what I thought
Waterproof??? Maybe install a vapor RETARDER (not barrier) to control air borne moisture diffusion through the wall. A vapor retarder paint would do it w/out ripping the drywall out. Least expensive/invasive way to install a vapor retarder for a finished interior wall. Make sure your exhaust fan works well and you'll be good to go.
If you need water proofing ... closest would be ceramic tile in a bathroom, I think. I doubt if that is what you are thinking, though. Definately good for a shower/tub surround.
Kind of sound like you're not sure what you want/need.
I think his concern is not waterproofing from the inside, but that he has siding directly on the studs with no sheathin or tarpaper so he is trying to keep the water hat wind drives through the siding from becoming locked up in the wall
Yeah, I think he wants to install some sort of rain screen from the inside. I also think that's not going to work, since there's no place for the water to drain.
Interesting. I didn't read that into it at all. Particularly since he said he has the Tyvek ... which in my mind is a substitute for felt paper (which I assume is a kind of wind driven rain screen.
The Tyvek was presumably an attempt at a rain screen. But, as I said, it doesn't provide a place for the water to drain.
The water would drain same as any install of siding and felt or Tyvek, I would think.
It would drain down to the bottom of the stud bay, and then where?
It MIGHT work if the OP pried open the lowest course of siding a hair and stuck the end of the Tyvek in there. There'd still be some overflowing at the edges and pooling in the bottom of the stud bay, but no worse than present, I suppose.
I obviously don't understand you. It would drain the same place as any siding installation. It wouldn't be IN the stud bay as the tyvek is on the outside ... siding, tyvek, studs/insulation, interior finish(es).
clew
He applied the tyvek from the INSIDE.
So, it's stapled or whatever, to the back of the siding. It runs in strips in BETWEEN the studs.
So, the plane is interupted each stud and probably doesn't go between the siding and the box frame at the bottom, unless he pried the siding out and managed to stuff the tyvek down behind it.
Oh ... I get it! (I'm a little slow sometimes) ... I missed reading that he applied it in pieces from the inside. That is like a pointless and expensive effort, it seems. It literally doesn't do what it is supposed to and is relatively expensive to do it.
waterproofing
There is no tarpaper or vapor barrier. I drain the runoff out of the building. I would like to know what you guys do in a situation like that.
I would like to know what you guys do in a situation like that.
Does the fire department need practice?
HOW do you drain runoff out oif the building!?!?!
What you describe is not possible
Whjat thedevil arewe missng?