![]() ![]() Kinda dusty, required me to move all furniture away from the walls, and I had to touch up paint the walls afterwards. Since stucco patching generally sucks aesthetically, I chose to have the cellulose blown in on the interior. Forget vapor barrier entirely - older houses assume vapor will gradually work its way through the entire wall system. it is more like house wrap in its purpose - to prevent liquid water intrusion, not to stop water vapor moving out of the structure. Note that tar paper isn't really vapor barrier. Probably a nonstarter for a stucco house. Adding insulating board to the exterior of the house under a new layer of siding.I know you want to do this from the attic but the problem there is that there can be barriers that prevent the insulation getting all the way down the wall (windows obviously, but there can be other things going on in there.) I know there are warnings about damaging keys with this but I have had no problems over the 12 years or so since the work was done. Putting holes in the walls (either interior or exterior) to blow in dense pack cellulose. ![]() Taking things down to the studs, filling the bays, and then putting up new drywall.I believe your main options for insulating walls are: That's under your stucco, yes? Is there sheathing (plank sheathing given the age of the house) on the interior of the stucco also? If so you can likely insulate your walls in the way you described safely. To safely insulate your walls without the use of spray foam insulation, you'll likely need to address the construction of your walls from the outside.Įdit: I'm sorry, I glossed over your last sentence, where you said you have tar paper. Older lumber has a greater to ability to get wet and dry out without rot/damage, but if you fill the cavity with insulation (thereby limiting the ability of the lumber to dry out), you'll certainly exceed that threshold. If so, your wall system is functioning because it's able to dry out adequately when it gets wet. If your stucco is original, it's likely that you have no weather barrier at all behind the stucco (tar paper, etc). The plaster & lath interior walls of your home aren't what's critical here-it's the makeup of your exterior walls. ![]()
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