The dearth of tumble security in impression #6 is a tad alarming. OSHA is generating the rounds in Massachusetts even on modest assignments such as this.
Some data counsel that persistent inhalation of mineral wool may perhaps end in upper respiratory consequences. The EPA has not labeled rock wool or slag wool for carcinogenicity. But when putting in it, put on a dust mask at minimum.
Although I have never witnessed mositure issues with this sort of assembly myself, the post DC linked to displays some problems that could occur up. I believe you're most probably to determine these difficulties in case you are in a location with quite long intervals of incredibly high regular humidty concentrations.
Over a linked abide by up Take note to your air sealing challenge on the whole, New England has become hammered by a series of snow storms & a consistent arctic chill over the past thirty day period - 9 out of ten houses on most household blocks are fighting big icicles and increasing ice dams...... There is certainly not one icicle rising on this creating!
Low-Power buildings often call for demanding air sealing, but this project was noteworthy for the unusual building enclosure components and also the recognition that exterior rock wool is an excellent Alternative for “vapor-out” assemblies.
In case you have bricks or cement block foundation partitions, you are going to desire a vapor barrier to go many of the way up the crawlspace wall to the best. It’s not crystal clear to me the insulation must go on very first; if you use rigid foam (instead of open insulation that should be enclosed on all sides), then it looks like you may put the insulation on next.
You can obtain blown mineral wool insulation. I’ve hardly ever employed, as well as viewed, the things, but it really’s out there. In the event you don’t need to use cellulose (which is frequently the popular selection for blown in insulation within an attic), you’d in all probability be most effective off applying blown mineral wool instead of batts. Blown insulation is really finest for an attic floor, and it’s surely the easiest to apply. You also get the benefit of no difficulties with thermal bridging because you bury the floor joists within the insulation. Monthly bill
Mineral wool was 50% more than fiberglass but it appears that evidently now - Regardless that both equally have enhanced drastically in the last number of many years - the previous is closer to double the cost ( R13 vs.
So why not Passive Household? Why not Passive House + fifty%? Regardless how high Electricity rates get there will almost always be some extent where additional insulation isn't going to Provide you an considerable reduction in Power intake. That's why we commonly use modelling to determine what is smart.
Consequently, we screwed a perforated metallic shelf by using a nylon insect screen to guidance and safeguard The underside edge of the rock wool insulation while delivering air flow and weep openings with the rainscreen style and design. We utilised the identical easy bracket system for the window and door headers.
For those who study throughout the various content articles on GBA, you can obtain an notion rockwool insulation of a lot of the fundamental concepts that will assist you to to be aware of where issues ought to Choose ideal effectiveness. You could generally question in Q+A way too if you can get stumped of For those who have a situation that doesn't quite in shape any on the illustrations while in the articles or blog posts.
The first thing I'd do is get some cable staples and tack that run of NM cable up for the underside in the rafters. You're not purported to free of charge-span wiring like that.
>"To limit humidity traveling from CMU wall to insulation ? Isn’t we are trying to let the wall assembly to dry to the inside?" Concrete & CMU foundations need not dry towards the inside. Individuals kinds of foundations functionality just high-quality even if fully saturated with h2o, and therefore are not degraded by moisure unless It is really regularly relocating through the concrete in a large rate having minerals with it.
Hello Fred, Sorry for hold off in reaction.... As equally Martin and Michael commented, you will discover mineral wool panels made for down below grade problems and as long as the perimeter soil is properly-draining, this down below grade mineral wool can be quite a good substitute to foam solutions. Even so, the challenge highlighted inside this text was a deep energy retrofit of an current framework and whole excavation exposing the exterior Basis might have been needed to put in insulation on the exterior side of the inspiration - not a realistic thing to consider on this tight urban web site.