From the couple of weeks that it took to set up the insulation and await delivery of your metal siding, there have been a dozen or so uninvited company in our wall assembly.
The R-benefit/inch must be updated (critical mainly because it appears this article is staying recycled): it's R4 to R4.2/inch for Rockwool products as the 1st commenter noted.
We nevertheless essential to figure out how you can mechanically fasten six inches of rock wool to the outside of the home. We wanted a method that will aid the vertical load in the insulation and also the siding in addition to horizontal lateral hundreds exerted by wind forces.
One benefit of this type of insulation is that it offers a route for h2o to empty downward (Preferably, to a functioning footing drain). Like exterior rigid foam, the above-quality percentage of the insulation has to be protected against physical abuse by some type of rigid finish substance.
To accomplish our R-60 aim around the roof, we over-framed the prevailing roof framing with 16-inch-deep TJIs and installed steel truss rods with horizontal keep-downs to prevent The brand new rafters from spreading.
“It has an exceedingly modest gain in R-benefit but I do like a lot of the other Attributes,” Wiscoguy writes In this particular Q&A put up. “Also, next to nobody in my area wishes to get it done, which pushes my timetable back further more.”
In a fully enclosed wall cavity, the main difference from the seem attenuation in between mineral wool and superior density fiberglass batts isn't apparent.
The fabric maintains ninety% of its insulating qualities to the product’s daily life and it has a vapor permeance rating of around fifty perms. Termites don’t like it. And moisture will not likely compromise its thermal resistance.
I don't Consider the latex paint are going to be an issue in sensible thicknesses. "Fair" right here will be a quick spray utilized coating to work as a binder. I do not seriously think you'll have any problems with shedding even though.
You don't need moisture trapped in the wall, and Zip-R sheathing isn't really perfect for enabling h2o vapor to migrate out to the outside, possibly, Specifically without having rain screen planned.
Armed with an educated National Grid system workers, the program was strengthened with support from workforce in the Building Science Corporation (BSC) who function method consultants To judge styles (and guard applicants from by themselves).
I concur with everything Invoice mentioned and hope that you're not overthinking this. In attics like yours there is an easy and cost efficient tactic: Pull out the previous insulation, put many hard work into air sealing the ceiling from your attic, and blow in just as much insulation as you may find the money for, with blocking and vent baffles on the eaves to prevent wind washing and retain air circulation to the ridge vent. This is often website messy and sometime not comfortable to perform, but additionally pretty Do-it-yourself-welcoming operate.
I am glad the Heco Topix Therm labored on this venture. I remember that the mineral wool thickness was appropriate at the edge with the operating array exactly where it wouldn't compress the MW. It doesn't audio such as you had excessive trouble.
Are there any fears about dropping R -benefit from soil backfill compacting the mineral wool, or from ground h2o flowing with the wool all through or subsequent a rain storm ("h2o washing")?